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Stock-based Compensation (Details) - USD ($)
$ / shares in Units, $ in Millions
 3 Months Ended 6 Months Ended 12 Months Ended
Jun. 30, 2023
Mar. 31, 2023
Jun. 30, 2022
Mar. 31, 2022
Jun. 30, 2023
Jun. 30, 2022
Dec. 31, 2022
Dec. 31, 2021
Restricted Stock Units (RSUs)                
Share-based Payment activity [Roll Forward]                
Unvested at beginning of period (in shares) 688,400 841,300 786,800 912,400 841,300 912,400 912,400  
Granted (in shares) 345,200   188,500   345,200 188,500    
Vested (in shares) (15,100)   (28,600)   (160,700) (151,400)    
Forfeited (in shares) (15,100)   (7,700)   (22,400) (10,500)    
Unvested at end of period (in shares) 1,003,400 688,400 939,000.0 786,800 1,003,400 939,000.0 841,300 912,400
Performance Shares [Member]                
Share-based Payment activity [Roll Forward]                
Unvested at beginning of period (in shares) 316,400 567,000.0 466,100 646,000.0 567,000.0 646,000.0 646,000.0  
Granted (in shares) 151,800   113,000.0   182,800 113,000.0    
Vested (in shares) 0   0   (257,200) (175,100)    
Forfeited (in shares) (4,600)   (2,200)   (29,000.0) (7,000.0)    
Unvested at end of period (in shares) 463,600 316,400 576,900 466,100 463,600 576,900 567,000.0 646,000.0
Share-based Payment Arrangement [Member]                
Share-based Payment activity [Roll Forward]                
Unvested at beginning of period (in shares) 1,004,800 1,408,300 1,252,900 1,558,400 1,408,300 1,558,400 1,558,400  
Granted (in shares) 497,000.0   301,500   528,000.0 301,500    
Vested (in shares) (15,100)   (28,600)   (417,900) (326,500)    
Forfeited (in shares) (19,700)   (9,900)   (51,400) (17,500)    
Unvested at end of period (in shares) 1,467,000 1,004,800 1,515,900 1,252,900 1,467,000 1,515,900 1,408,300 1,558,400
Share-based Payment activity, additional disclosures [Abstract]                
Weighted average grant date fair value, beginning of period (in dollars per share) $ 192.36 $ 170.78 $ 152.62 $ 152.27 $ 170.78 $ 152.27 $ 152.27  
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Grants in Period, Weighted Average Grant Date Fair Value 137.67   224.59   136.13 223.61    
Weighted average grant date fair value, vested (in dollars per share) 131.67   129.96   116.49 147.57    
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Forfeitures, Weighted Average Grant Date Fair Value 186.15   173.02   148.89 173.44    
Weighted average grant date fair value, end of period (in dollars per share) $ 174.54 $ 192.36 $ 167.23 $ 152.62 $ 174.54 $ 167.23 $ 170.78 $ 152.27
Weighted average remaining contractual life, unvested shares outstanding 1 year 10 months 6 days 1 year 7 months 28 days 1 year 11 months 23 days 1 year 10 months 2 days 1 year 10 months 6 days 1 year 11 months 23 days 1 year 9 months 14 days 1 year 11 months 26 days
Unamortized deferred compensation cost $ 104.5       $ 104.5