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Acquisitions (Centauri Platform Holdings, LLC) (Details) - USD ($)
12 Months Ended
Oct. 01, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Sep. 30, 2020
Business Acquisition [Line Items]          
Acquisition related costs   $ 12,000,000 $ 9,000,000 $ 2,000,000  
Goodwill   2,060,000,000 1,761,000,000 $ 1,265,000,000  
Notes Due 2028 | Senior Notes          
Business Acquisition [Line Items]          
Aggregate principal amount         $ 250,000,000
Interest rate, stated percentage         4.75%
Centauri L L C          
Business Acquisition [Line Items]          
Purchase price of acquisition $ 830,000,000        
Acquisition related costs   $ 6,000,000 9,000,000    
Revenues     125,000,000    
Gross profit     $ 19,000,000    
Goodwill 576,000,000        
Centauri L L C | Notes Due 2028 | Senior Notes          
Business Acquisition [Line Items]          
Aggregate principal amount $ 250,000,000        
Interest rate, stated percentage 4.75%