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Stock Repurchases, Dividends and Earnings per Share - Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
1 Months Ended 3 Months Ended 9 Months Ended
Jul. 31, 2023
Sep. 30, 2023
Jun. 30, 2023
Mar. 31, 2023
Sep. 30, 2022
Jun. 30, 2022
Mar. 31, 2022
Sep. 30, 2023
Sep. 30, 2022
Oct. 26, 2023
Dec. 31, 2022
Oct. 31, 2020
Dividends Payable [Line Items]                        
Reserve for stock issuance (in shares)   11,700,000           11,700,000        
Share repurchase authorized amount                       $ 2,000.0
Stock repurchased and pending settlement (in shares)   100,000     0     100,000 0      
Stock repurchased and pending settlement   $ 10.7           $ 10.7        
Remaining authorized repurchase amount   $ 1,400.0           $ 1,400.0        
Quarterly dividend declared (in dollars per share) $ 0.535 $ 0.535     $ 0.495     $ 1.525 $ 1.415      
Cash dividends declared   $ 168.5 $ 156.6 $ 156.5 $ 156.4 $ 145.3 $ 145.3          
Quarterly dividend payable   $ 168.5           $ 168.5     $ 156.4  
Antidilutive securities (in shares)   100,000     100,000     100,000 100,000      
Retained Earnings                        
Dividends Payable [Line Items]                        
Cash dividends declared   $ 168.5 $ 156.6 $ 156.5 $ 156.4 $ 145.3 $ 145.3 $ 481.6        
Subsequent Event                        
Dividends Payable [Line Items]                        
Share repurchase authorized amount                   $ 3,000.0