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Shareholders' Equity (Shares Repurchased Under Share Repurchase Program) (Details) - USD ($)
$ / shares in Units, $ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Class of Stock [Line Items]      
Aggregate purchase price $ 2,303.2 $ 382.3 $ 44.7
Common Stock [Member]      
Class of Stock [Line Items]      
Treasury stock cancellation, Shares 16,000,000    
Stock Repurchase Program Board Authorized Repurchases [Member]      
Class of Stock [Line Items]      
Shares repurchased (in shares) 22,300,000 7,200,000 1,300,000
Aggregate purchase price $ 2,303.2 $ 382.3 $ 44.7
Average purchase price per share (in dollars per share) $ 103.18 $ 52.76 $ 35.51
Remaining amount available for share repurchase $ 894.6