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Stock-Based Compensation (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Payment Arrangement, Expense $ 95.1 $ 74.9 $ 75.3
Other Stock Compensation Programs [Abstract]      
Amortization of Other Deferred Charges (Reversal)   $ 13.5  
Performance Shares [Member]      
Restricted stock unit activity [Roll Forward]      
Unvested at beginning of period (in shares) 458,100 567,000.0 646,000.0
Granted (in shares) 168,700 185,200 116,500
Vested (in shares) (109,000.0) (257,200) (175,100)
Forfeited (in shares) (92,100) (36,900) (20,400)
Unvested at end of period (in shares) 425,700 458,100 567,000.0
Share-based Payment Arrangement [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Number of shares available for grant (in shares) 1,500,000    
Restricted stock unit activity [Roll Forward]      
Unvested at beginning of period (in shares) 1,448,200 1,408,300 1,558,400
Granted (in shares) 669,600 705,700 469,700
Vested (in shares) (456,500) (554,000.0) (570,800)
Forfeited (in shares) (144,900) (111,800) (49,000.0)
Unvested at end of period (in shares) 1,516,400 1,448,200 1,408,300
Restricted stock unit activity, additional disclosures [Abstract]      
Weighted average grant date fair value, beginning of period (in dollars per share) $ 175.07 $ 170.78 $ 152.27
Weighted average grant date fair value, granted (in dollars per share) 210.34 143.64 204.05
Weighted average grant date fair value, vested (in dollars per share) 184.86 126.28 147.78
Weighted average grant date fair value, forfeitures (in dollars per share) 173.88 164.42 168.92
Weighted average grant date fair value, end of period (in dollars per share) $ 187.78 $ 175.07 $ 170.78
Weighted average remaining contractual life, unvested shares outstanding and expected to vest 1 year 3 months 18 days    
Unamortized deferred compensation cost $ 93.5    
Fair value of shares vested 84.4 $ 70.0 $ 84.3
Grant date fair value 140.8 101.4 95.8
Share-based Payment Arrangement [Member] | Performance Shares [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Payment Arrangement, Expense 12.6 9.0 26.8
Share-based Payment Arrangement [Member] | Restricted Stock Units (RSUs) [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Payment Arrangement, Expense $ 82.5 $ 65.9 $ 48.5
Restricted Stock Units (RSUs) [Member]      
Restricted stock unit activity [Roll Forward]      
Unvested at beginning of period (in shares) 990,100 841,300 912,400
Granted (in shares) 500,900 520,500 353,200
Vested (in shares) (347,500) (296,800) (395,700)
Forfeited (in shares) (52,800) (74,900) (28,600)
Unvested at end of period (in shares) 1,090,700 990,100 841,300