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COMMON STOCK - Treasury Stock (Narrative) (Details) - USD ($)
shares in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
May 31, 2021
May 31, 2019
Treasury Stock          
Purchases of treasury stock $ (512,800,000) $ (625,400,000) $ (263,300,000)    
Treasury Stock          
Treasury Stock          
Purchases of treasury stock (in shares) 5.8 3.1 1.5    
Purchases of treasury stock $ (512,800,000) $ (625,400,000) $ (263,300,000)    
Stock Repurchase Program May 2019          
Treasury Stock          
Authorized amount for share repurchase         $ 1,000,000,000
Stock Repurchase Program May 2021          
Treasury Stock          
Authorized amount for share repurchase       $ 1,000,000,000