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Equity - Share Repurchases, Dividends, Stock-Based Compensation (Details) - USD ($) $ / shares in Units, $ in Millions |  | 1 Months Ended | 3 Months Ended |
--- | --- | --- | --- | ---
Apr. 26, 2022 | Mar. 31, 2022 | Jan. 31, 2022 | Mar. 31, 2022 | Mar. 31, 2021 | Jul. 20, 2021
Share Repurchase Plan |  |  |  |  |  |
Value of shares authorized by the Board of Directors to be repurchased under share repurchase plan |  |  |  |  |  | $ 1,000.0
Share repurchases (in shares) |  |  |  | 113,529 | 0 |
Average costs per share |  |  |  | $ 150.97 |  |
Value of shares repurchased |  |  |  | $ 17.1 |  |
Remaining value of shares authorized by the Board of Directors to be repurchased under share repurchase plan |  | $ 695.5 |  | 695.5 |  |
Common Stock and Additional Paid-In (in Shares) |  |  |  |  |  |
Payments made to tax authorities on employees' behalf |  |  |  | $ 17.1 | $ 8.2 |
Dividends |  |  |  |  |  |
Common stock quarterly dividend per share (in dollars per share) |  |  |  | $ 0.875 | $ 0.6875 |
Common stock dividend quarterly declared and paid per share (in dollars per share) | $ 0.8750 |  |  | $ 0.8750 | $ 0.6875 |
Dividends paid |  |  |  | $ 54.2 | $ 43.8 |
Common Stock and Additional Paid in Capital |  |  |  |  |  |
Share Repurchase Plan |  |  |  |  |  |
Value of shares repurchased |  |  |  | (5.3) |  |
Restricted stock units (RSUs) |  |  |  |  |  |
Dividends |  |  |  |  |  |
Dividend equivalents paid |  |  |  | $ 2.5 | $ 1.0 |
Stock-Based Compensation |  |  |  |  |  |
Vesting period (in years) |  | 3 years | 3 years |  |  |
Changes |  |  |  |  |  |
Granted (in units) |  | 136,346 | 56,452 |  |  |
Weighted Average Grant Date Fair Value |  |  |  |  |  |
Granted (in dollars per unit) |  | $ 195.28 | $ 152.21 |  |  |
Restricted stock units (RSUs) and performance stock units (PSUs) |  |  |  |  |  |
Changes |  |  |  |  |  |
Unvested at the beginning of the year (in units) |  |  | 831,597 | 831,597 |  |
Granted (in units) |  |  |  | 305,249 |  |
Vested (in units) |  |  |  | (23,280) |  |
Cancelled or forfeited (in units) |  |  |  | (18,607) |  |
Unvested at the end of the period (in units) |  | 1,094,959 |  | 1,094,959 |  |
Shares reserved for future grants (all plans) |  | 1,569,117 |  | 1,569,117 |  |
Weighted Average Grant Date Fair Value |  |  |  |  |  |
Unvested at the beginning of the year (in dollars per unit) |  |  | $ 105.12 | $ 105.12 |  |
Granted (in dollars per unit) |  |  |  | 187.31 |  |
Vested (in dollars per unit) |  |  |  | 95.87 |  |
Cancelled or forfeited (in dollars per unit) |  |  |  | 114.28 |  |
Unvested at the end of the period (in dollars per unit) |  | $ 128.07 |  | $ 128.07 |  |
Aggregate Fair Value |  |  |  |  |  |
Unvested at the end of the period |  | $ 257.7 |  | $ 257.7 |  |
Number of shares of common stock that were unsettled |  |  |  | 59,135 |  |
Performance stock units (PSUs) |  |  |  |  |  |
Stock-Based Compensation |  |  |  |  |  |
Vesting period (in years) |  | 3 years |  | 3 years | 3 years |
Changes |  |  |  |  |  |
Granted (in units) |  | 112,451 |  |  |  |
Weighted Average Grant Date Fair Value |  |  |  |  |  |
Granted (in dollars per unit) |  | $ 195.28 |  |  |  |
Performance stock units (PSUs) | Maximum |  |  |  |  |  |
Stock Based Compensation |  |  |  |  |  |
Share of Common Stock |  |  |  | 2 |  |
All stock-based compensation plans |  |  |  |  |  |
Common Stock and Additional Paid-In (in Shares) |  |  |  |  |  |
Payments made to tax authorities on employees' behalf |  |  |  | $ 17.1 | $ 8.2 |

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