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Equity - Share Repurchase Program and Share Repurchase Activity (Details) - USD ($)
 1 Months Ended 3 Months Ended
Apr. 30, 2021
Mar. 31, 2021
Mar. 31, 2020
Feb. 04, 2021
May 31, 2015
Equity, Class of Treasury Stock [Line Items]          
Stock repurchase program, authorized amount         $ 1,200,000,000
Stock repurchase program, additional authorized amount       $ 300,000,000  
Stock repurchase program, remaining authorized repurchase amount   $ 500,000,000      
Number of shares repurchased (in shares)   2,274,710 417,707    
Cash paid for repurchased shares   $ 398,450,000 $ 73,164,000    
Treasury stock, average price paid per share (in dollars per share)   $ 180.44 $ 151.22    
Subsequent Event          
Equity, Class of Treasury Stock [Line Items]          
Stock repurchase program, remaining authorized repurchase amount $ 290,000,000        
Open Market Purchases          
Equity, Class of Treasury Stock [Line Items]          
Cash paid for repurchased shares   $ 8,000,000.0      
Open Market Purchases | Subsequent Event          
Equity, Class of Treasury Stock [Line Items]          
Cash paid for repurchased shares $ 20,000,000.0