| Cash Provided by (Used in) Operating Activity, Including Discontinued Operation | $3.1B | $3.4B | $1.0B | $2.9B | $3.7B | $3.9B | $1.7B | $3.8B |
| Cash Provided by (Used in) Financing Activity, Including Discontinued Operation | -$216.9M | -$2.4B | $2.8B | -$2.2B | -$2.2B | -$1.3B | -$2.9B | -$2.4B |
| Comprehensive Income Including Noncontrolling Interest | $1.9B | $1.9B | $1.8B | $1.6B | $3.1B | $1.5B | $2.1B | $2.1B |
| Comprehensive Income Attributable to Parent | $1.9B | $1.9B | $1.8B | $1.6B | $3.1B | $1.5B | $2.1B | $2.1B |
| Comprehensive Income Including Noncontrolling Interest | $1.9B | $1.9B | $1.8B | $1.6B | $3.1B | $1.5B | $2.1B | $2.1B |
| Comprehensive income (loss), including noncontrolling interest | $1.9B | $1.9B | $1.8B | $1.6B | $3.1B | $1.5B | $2.1B | $2.1B |
| Comprehensive Income (Loss), Net of Tax, Including Portion Attributable to Noncontrolling Interest | $1.9B | $1.9B | $1.8B | $1.6B | $3.1B | $1.5B | $2.1B | $2.1B |
| Comprehensive Income (Loss), Total | $1.9B | $1.9B | $1.8B | $1.6B | $3.1B | $1.5B | $2.1B | $2.1B |
| Comprehensive Income, Including Noncontrolling Interest | $1.9B | $1.9B | $1.8B | $1.6B | $3.1B | $1.5B | $2.1B | $2.1B |
| Comprehensive Income Including Noncontrolling Interest | $1.9B | $1.9B | $1.8B | $1.6B | $3.1B | $1.5B | $2.1B | $2.1B |
| Total Comprehensive Income | $1.9B | $1.9B | $1.8B | $1.6B | $3.1B | $1.5B | $2.1B | $2.1B |
| Comprehensive Income | $1.9B | $1.9B | $1.8B | $1.6B | $3.1B | $1.5B | $2.1B | $2.1B |
| Comprehensive Income (Loss), Net of Tax, Attributable to Parent | $1.8B | $1.9B | $1.8B | $1.5B | $3.0B | $1.4B | $2.1B | $2.0B |
| Other Comprehensive Income (Loss) | $1.8B | $1.9B | $1.8B | $1.5B | $3.0B | $1.4B | $2.1B | $2.0B |
| Cash Provided by (Used in) Investing Activity, Including Discontinued Operation | -$2.5B | -$1.5B | -$385.5M | -$407.3M | -$455.6M | -$771.3M | -$504.9M | -$1.7B |
| Goodwill Additions | $1.9B | $1.0B | $142.4M | $222.6M | $161.1M | $585.8M | $241.6M | $1.7B |
| Payments for Repurchase of Common Stock | $1.4B | $628.4M | $898.3M | $1.4B | $1.8B | $473.9M | $2.3B | $1.7B |
| Stock Repurchased During Period, Value | $1.4B | $628.4M | $898.3M | $1.4B | $1.8B | $473.9M | $2.3B | $1.7B |
| Treasury stock, value, acquired | $1.4B | $628.1M | $897.4M | $1.4B | $1.8B | $473.8M | $2.3B | $1.7B |
| Payments To Acquire Businesses And Interest In Affiliates | $2.3B | $1.3B | $241.6M | $250.8M | $297.1M | $681.8M | $373.8M | $1.6B |
| Change in Deferred Revenue | — | — | -$313.4M | $759.2M | $253.7M | $7.1M | -$369.0M | $1.1B |
| Dividends, Common Stock | $811.0M | $807.9M | $925.6M | $929.0M | $923.9M | $921.7M | $1.0B | $1.0B |
| Cash Dividends on Common Stock | $811.0M | $807.9M | $925.6M | $929.0M | $923.9M | $921.7M | $1.0B | $1.0B |
| Income taxes paid | $454.2M | $445.4M | $529.2M | $779.2M | $485.5M | $677.7M | $563.2M | $751.0M |
| Stock-based compensation | $473.9M | $402.8M | $470.4M | $686.1M | $497.8M | $439.5M | $469.0M | $713.4M |
| Depreciation, Amortization And Other | $521.3M | $596.4M | $569.3M | $544.9M | $568.5M | $758.9M | $581.8M | $585.5M |
| Increase (Decrease) in Other Operating Assets | $266.3M | — | $441.5M | $445.9M | $211.1M | $0.0 | $285.3M | $453.8M |
| OCI Foreign Currency Gain (Loss) Before Reclassification and Tax | -$60.0M | $300.9M | -$486.1M | -$174.0M | $758.6M | $144.3M | -$181.9M | $345.9M |
| Foreign Currency Translation Adjustments, Net | -$60.0M | $300.9M | -$486.1M | -$174.0M | $758.6M | $144.3M | -$181.9M | $345.9M |
| OCI Foreign Currency Translation Adjustment, Before Tax | -$60.0M | $300.9M | -$486.1M | -$174.0M | $758.6M | $144.3M | -$181.9M | $345.9M |
| OCI Foreign Currency Gain (Loss), Pre-tax | -$60.0M | $300.9M | -$486.1M | -$174.0M | $758.6M | $144.3M | -$181.9M | $345.9M |
| Foreign currency translation gains (losses) | -$55.7M | $294.2M | -$475.0M | -$166.9M | $738.5M | $139.0M | -$173.2M | $338.9M |
| Foreign Currency Translation Adjustment, Net of Tax | -$55.7M | $294.2M | -$475.0M | -$166.9M | $738.5M | $139.0M | -$173.2M | $338.9M |
| Proceeds from issuance of shares | $504.5M | $150.8M | $477.4M | $210.3M | $510.0M | $156.1M | $466.2M | $289.5M |
| Shares Issued, Value, Share-Based Payment Arrangement, after Forfeiture | $504.5M | $150.8M | $477.4M | $210.3M | $510.0M | $156.1M | $466.2M | $289.5M |
| Change in Other Liabilities | -$176.6M | -$73.8M | -$11.9M | -$119.3M | -$102.2M | — | -$99.2M | -$263.9M |
| Other liabilities | -$176.6M | -$73.8M | -$11.9M | -$119.3M | -$102.2M | — | -$99.2M | -$263.9M |
| Net Change in Cash and Restricted Cash | — | -$532.7M | $3.3B | $184.4M | $1.1B | $1.8B | -$1.8B | -$250.2M |
| Accrued compensation and employee benefits | — | — | -$307.4M | -$477.3M | $646.6M | $1.0B | -$74.3M | -$245.3M |
| Foreign Currency Translation and Other Adjustments | -$22.7M | $258.6M | -$393.7M | -$142.9M | $691.6M | $149.3M | -$156.4M | $235.2M |
| Other comprehensive income (loss), after-tax | -$100.4M | $205.3M | -$504.7M | -$261.7M | $837.6M | $24.5M | -$133.9M | $202.2M |
| Other comprehensive income (loss) | -$100.4M | $205.3M | -$504.7M | -$261.7M | $837.6M | $24.5M | -$133.9M | $202.2M |
| Other Comprehensive Income (Loss), Net of Tax | -$98.1M | $200.5M | -$494.7M | -$259.0M | $822.8M | $20.2M | -$131.0M | $195.9M |
| OCI Attributable to Parent | -$98.1M | $200.5M | -$494.7M | -$259.0M | $822.8M | $20.2M | -$131.0M | $195.9M |
| Other comprehensive income/(loss) | -$98.1M | $200.5M | -$494.7M | -$259.0M | $822.8M | $20.2M | -$131.0M | $195.9M |
| Other Comprehensive Income (Loss), Net of Tax, Attributable to Parent | -$98.1M | $200.5M | -$494.7M | -$259.0M | $822.8M | $20.2M | -$131.0M | $195.9M |
| OCI Net of Tax, Parent | -$98.1M | $200.5M | -$494.7M | -$259.0M | $822.8M | $20.2M | -$131.0M | $195.9M |
| OCI Attributable to Parent | -$98.1M | $200.5M | -$494.7M | -$259.0M | $822.8M | $20.2M | -$131.0M | $195.9M |
| OCI Cash Flow Hedge Before Reclassification and Tax | -$47.6M | — | $14.6M | -$113.6M | $77.0M | -$243.1M | -$53.9M | -$181.4M |
| Cash flow hedges | -$47.6M | — | $14.6M | -$113.6M | $77.0M | -$243.1M | -$53.9M | -$181.4M |
| Unrealized Gain (Loss) on Derivatives, Net | -$47.6M | — | $14.6M | -$113.6M | $77.0M | -$243.1M | -$53.9M | -$181.4M |
| Amortization of capitalized software and acquired intangible assets | $133.1M | $165.7M | $160.2M | $152.2M | $153.2M | $280.3M | $152.4M | $171.8M |
| Capital Expenditures | $124.1M | $213.6M | $152.2M | $170.8M | $169.1M | $107.9M | $156.6M | $149.7M |
| Payments to Acquire Property, Plant, and Equipment | $124.1M | $213.6M | $152.2M | $170.8M | $169.1M | $107.9M | $156.6M | $149.7M |
| Depreciation | $138.1M | $141.6M | $133.1M | $133.8M | $138.8M | $216.8M | $143.6M | $142.7M |
| Change in Income Taxes Payable | $217.7M | $205.5M | $50.9M | -$345.2M | — | -$80.7M | $26.4M | -$138.8M |
| Increase Decrease In Accrued Income Taxes Payable | $217.7M | $205.5M | $50.9M | -$345.2M | — | -$80.7M | $26.4M | -$138.8M |
| OCI Defined Benefit Plan Prior Service Cost, Before Tax | $76.8K | $76.8K | — | $0.0 | — | — | — | $102.4M |
| Deferred taxes | $111.9M | -$171.7M | $59.2M | $134.1M | $88.5M | $75.5M | $53.9M | $97.7M |
| OCI - Cash flow hedge, net of tax | -$47.3M | — | -$3.9M | -$95.6M | $80.8M | -$185.9M | -$24.6M | -$96.1M |
| Other comprehensive income (loss), net of tax | -$47.3M | — | -$3.9M | -$95.6M | $80.8M | -$185.9M | -$24.6M | -$96.1M |
| OCI Cash Flow Hedge Gain (Loss) | -$47.3M | — | -$3.9M | -$95.6M | $80.8M | -$185.9M | -$24.6M | -$96.1M |
| Unrealized Gains (Losses) on Hedge Instruments | -$47.3M | — | -$3.9M | -$95.6M | $80.8M | -$185.9M | -$24.6M | -$96.1M |
| OCI - Cash Flow Hedges, Net of Tax | -$47.3M | — | -$3.9M | -$95.6M | $80.8M | -$185.9M | -$24.6M | -$96.1M |
| Unrealized gains (losses) on hedge instruments | -$47.3M | — | -$3.9M | -$95.6M | $80.8M | -$185.9M | -$24.6M | -$96.1M |
| Accounts payable | -$34.2M | $394.7M | -$124.4M | — | -$23.2M | -$6.9M | $291.9M | $92.5M |
| Effect of Exchange Rate on Cash (Continuing Operations) | -$58.0M | — | -$87.1M | -$56.7M | — | -$20.7M | -$77.5M | $86.4M |
| Cash flow hedge gain loss to be reclassified within 12 months | — | — | $25.1M | -$63.1M | — | -$112.5M | -$140.9M | -$65.7M |
| Cash Flow Hedge Gain Loss To Be Reclassified Within Twelve Months | — | — | $25.1M | -$63.1M | — | -$112.5M | -$140.9M | -$65.7M |
| OCI Cash Flow Hedge Reclassification, Before Tax | $10.2M | $2.8M | $7.5M | -$1.8M | -$1.9M | -$13.9M | -$29.4M | -$58.1M |
| Cash flow hedges, Gain or (loss) reclassified from accumulated OCI into income | $10.2M | $2.8M | $7.5M | -$1.8M | -$1.9M | -$13.9M | -$29.4M | -$58.1M |
| Other income, net (Note 6) | -$18.9M | -$49.6M | -$39.2M | $32.6M | -$43.0M | -$13.4M | $53.1M | -$51.9M |
| OCI - Defined benefit plan, net of tax | -$4.9M | $74.2M | $15.8M | -$3.4M | -$3.5M | -$67.0M | -$66.8M | $47.0M |
| Other Comprehensive Income (Loss) | -$4.9M | $74.2M | $15.8M | -$3.4M | -$3.5M | -$67.0M | -$66.8M | $47.0M |
| OCI Defined Benefit Plan Net of Tax | -$4.9M | $74.2M | $15.8M | -$3.4M | -$3.5M | -$67.0M | -$66.8M | $47.0M |
| Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax | -$4.9M | $74.2M | $15.8M | -$3.4M | -$3.5M | -$67.0M | -$66.8M | $47.0M |
| OCI Defined Benefit Plan, After Tax | -$4.9M | $74.2M | $15.8M | -$3.4M | -$3.5M | -$67.0M | -$66.8M | $47.0M |
| OCI Pension Adjustments | -$4.9M | $74.2M | $15.8M | -$3.4M | -$3.5M | -$67.0M | -$66.8M | $47.0M |
| OCI Pension Reclassification Adjustment, Pre-tax | -$4.9M | $74.2M | $15.8M | -$3.4M | -$3.5M | -$67.0M | -$66.8M | $47.0M |
| OCI Defined Benefit Plan, Net of Tax | -$4.9M | $74.2M | $15.8M | -$3.4M | -$3.5M | -$67.0M | -$66.8M | $47.0M |
| OCI Attributable to Noncontrolling Interest | $46.9M | $39.1M | $27.2M | $31.7M | $61.2M | $40.1M | $27.5M | $40.5M |
| Less: comprehensive income attributable to noncontrolling interest | $46.9M | $39.1M | $27.2M | $31.7M | $61.2M | $40.1M | $27.5M | $40.5M |
| Comprehensive Income Attributable to Noncontrolling Interests | $46.9M | $39.1M | $27.2M | $31.7M | $61.2M | $40.1M | $27.5M | $40.5M |
| Comprehensive Income, Noncontrolling Interest | $46.9M | $39.1M | $27.2M | $31.7M | $61.2M | $40.1M | $27.5M | $40.5M |
| OCI Net Actuarial Gain (Loss) | -$17.0M | -$17.0M | — | $0.0 | — | — | — | $30.2M |
| OCI Defined Benefit Plan Actuarial Gain (Loss) | -$17.0M | -$17.0M | — | $0.0 | — | — | — | $30.2M |
| OCI Pension Unamortized Gain (Loss) Arising Before Tax | -$17.0M | -$17.0M | — | $0.0 | — | — | — | $30.2M |
| OCI Benefit Plans Actuarial Gain (Loss), Before Tax | -$17.0M | -$17.0M | — | $0.0 | — | — | — | $30.2M |
| OCI Pension Unamortized Gain (Loss), Pre-tax | -$17.0M | -$17.0M | — | $0.0 | — | — | — | $30.2M |
| OCI Cash Flow Hedge, After Reclassification, Tax | -$10.4M | -$10.9M | $11.0M | -$16.1M | -$2.0M | -$43.2M | $115.0K | -$27.2M |
| OCI Pension and Postretirement Before Reclassification, Tax | -$1.7M | $30.5M | $1.9M | -$833.0K | -$1.1M | -$32.7M | -$15.5M | $17.4M |
| Financing — other | -$26.2M | -$472.2M | -$31.0M | -$38.5M | -$6.5M | -$35.6M | -$36.8M | -$16.1M |
| Interest Paid, Net | — | $10.9M | $12.6M | $17.2M | $116.0M | $9.6M | $115.0M | $9.0M |
| Interest Paid, Excluding Capitalized Interest, Operating Activity | — | $10.9M | $12.6M | $17.2M | $116.0M | $9.6M | $115.0M | $9.0M |
| OCI Reclassification Adjustment, Pension and Postretirement, Before Tax | $6.5M | — | -$17.7M | $4.3M | $4.7M | $25.8M | $82.4M | $7.8M |
| Add - Incremental shares under stock-based compensation plans (in shares) | $6.5M | — | $8.2M | $6.6M | $5.5M | — | $6.0M | $4.5M |
| Other investing activities, net | -$2.9M | -$2.2M | -$3.0M | -$4.2M | -$3.4M | -$4.3M | -$2.9M | -$2.4M |
| Payment for (Proceeds from) Other Investing Activity | -$2.9M | -$2.2M | -$3.0M | -$4.2M | -$3.4M | -$4.3M | -$2.9M | -$2.4M |
| Other Depreciation and Amortization | $3.6M | $3.7M | $4.2M | $5.9M | $5.2M | — | $1.0M | $2.0M |
| Net Income Loss Attributable To Redeemable Noncontrolling Interest | $1.9M | $1.6M | $2.2M | $1.7M | $2.1M | $1.3M | $2.1M | $1.7M |
| Stockholders' Equity, Other | $1.9M | $492.7M | $1.2M | $768.0K | -$1.6M | -$17.2M | $21.5M | $794.0K |
| Stockholders' Equity, Other | $1.9M | $492.7M | $1.2M | $768.0K | -$1.6M | -$17.2M | $21.5M | $794.0K |
| OCI Foreign Currency Translation Tax | -$2.1M | — | -$1.0M | -$4.5M | $5.4M | $918.0K | -$5.8M | $544.0K |
| OCI Foreign Currency Translation Gain (Loss), Tax | -$2.1M | — | -$1.0M | -$4.5M | $5.4M | $918.0K | -$5.8M | $544.0K |
| Diluted effect of share purchase plans related to Class A ordinary shares (in shares) | 97.1K | — | 197.8K | 177K | 50.4K | 289.2K | 107.7K | 521.7K |
| Proceeds from the sale of businesses and investments, net of cash transferred | — | — | $5.3M | $10.2M | $7.3M | — | $22.6M | $348.0K |
| Common Stock Dividends Per Share (Paid) | $1.3 | $1.3 | $1.5 | $1.5 | $1.5 | $1.5 | $1.6 | $1.6 |
| Common stock dividends per share cash paid | $1.3 | $1.3 | $1.5 | $1.5 | $1.5 | $1.5 | $1.6 | $1.6 |
| Common Stock Dividends Per Share (Cash Paid) | $1.3 | $1.3 | $1.5 | $1.5 | $1.5 | $1.5 | $1.6 | $1.6 |
| Common Dividends Per Share Paid | $1.3 | $1.3 | $1.5 | $1.5 | $1.5 | $1.5 | $1.6 | $1.6 |
| Cash Dividend per Common Share | $1.3 | $1.3 | $1.5 | $1.5 | $1.5 | $1.5 | $1.6 | $1.6 |
| Change in Accounts Receivable | — | $14.7M | $1.2B | — | $307.2M | — | $1.1B | — |
| Number of reportable segments | — | — | 3.00 | — | — | — | 3.00 | — |
| Advertising costs | $26.1M | $26.1M | $19.6M | $19.6M | $19.6M | $19.6M | — | — |
| Pre-tax stock-based compensation cost | $485.4M | $485.4M | $523.5M | $523.5M | $523.5M | $523.5M | — | — |
| Additions / (Releases) | $2.5M | $2.5M | $2.9M | $2.9M | $2.9M | $2.9M | — | — |
| Federal | $102.1M | $102.1M | $59.5M | $59.5M | $59.5M | $59.5M | — | — |
| Federal | -$38.6M | -$38.6M | $13.3M | $13.3M | $13.3M | $13.3M | — | — |
| State | -$13.8M | -$13.8M | $8.3M | $8.3M | $8.3M | $8.3M | — | — |
| Defined Benefit Plan, Net Periodic Benefit Cost (Credit) | $55.7M | $55.7M | $55.0M | $55.0M | $55.0M | $55.0M | — | — |
| Effective Income Tax Rate Reconciliation, FDII, Percent | 0.4% | 0.4% | 0.4% | 0.4% | 0.4% | 0.4% | — | — |
| Goodwill impairment losses | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | $0.0 | — | — |
| Tax holiday income tax benefits | $11.0M | $11.0M | $12.5M | $12.5M | $12.5M | $12.5M | — | — |
| Increase (Decrease) in Accounts Receivable | — | $14.7M | $1.2B | — | $307.2M | — | $1.1B | — |
| Number of reportable segments | — | — | $3.0 | — | — | — | $3.0 | — |
| Other Noncash Income (Expense) | $57.1M | — | $19.9M | $52.6M | $45.5M | $82.4M | $74.1M | — |
| Issuance of debt | $1.6B | $0.0 | $5.1B | — | — | — | $0.0 | $0.0 |
| Repayments of Debt | $100.0M | $671.2M | $931.9M | — | — | — | $0.0 | $0.0 |
| Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value | $85.44 | $85.44 | $86.62 | $86.62 | $86.62 | $86.62 | — | — |
| Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period | 255.7K | 255.7K | 340.1K | 340.1K | 340.1K | 340.1K | — | — |
| Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value | $73.17 | $73.17 | $77.59 | $77.59 | $77.59 | $77.59 | — | — |
| Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value | $72.94 | $72.94 | $86.45 | $86.45 | $86.45 | $86.45 | — | — |
| Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period | 1.5M | 1.5M | 1.5M | 1.5M | 1.5M | 1.5M | — | — |
| Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period | 1.8M | 1.8M | 1.9M | 1.9M | 1.9M | 1.9M | — | — |
| Vested, grant-date fair value | $431.6M | $431.6M | $474.8M | $474.8M | $474.8M | $474.8M | — | — |
| Number of shares purchased (in shares) | 3.5M | 3.5M | 3.5M | 3.5M | 3.5M | 3.5M | — | — |
| Unrecognized tax benefits, settlements | $2.9M | $2.9M | $3.1M | $3.1M | $3.1M | $3.1M | — | — |
| Unrecognized Tax Benefits, Decrease Resulting from Foreign Currency Translation | — | — | $221.0K | $221.0K | $221.0K | $221.0K | — | — |
| Interest expense and penalties, net (benefit)/charge recognized | $9.3M | $9.3M | -$5.0M | -$5.0M | -$5.0M | -$5.0M | — | — |
| Foreign currency effect | $856.3K | $856.3K | — | — | — | — | — | — |
| Additions for tax positions of prior years | $23.8M | $23.8M | $125.4M | $125.4M | $125.4M | $125.4M | — | — |
| Valuation Allowance, Deferred Tax Asset, Increase (Decrease), Amount | $34.4M | $34.4M | $17.7M | $17.7M | $17.7M | $17.7M | — | — |
