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Goodwill and Intangible Assets (Cost and Accumulated Amortization of Intangible Assets) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Acquired Finite-Lived Intangible Assets [Line Items]    
Intangible Assets, Gross $ 999 $ 911
Accumulated Amortization (291) (228)
Intangible Assets, Net $ 708 $ 683
Customer relationships    
Acquired Finite-Lived Intangible Assets [Line Items]    
Weighted Average Remaining Useful Lives 14 years 15 years
Intangible Assets, Gross $ 546 $ 470
Accumulated Amortization (124) (100)
Intangible Assets, Net $ 422 $ 370
Developed technologies    
Acquired Finite-Lived Intangible Assets [Line Items]    
Weighted Average Remaining Useful Lives 18 years 19 years
Intangible Assets, Gross $ 75 $ 75
Accumulated Amortization (39) (37)
Intangible Assets, Net $ 36 $ 38
Contract backlog    
Acquired Finite-Lived Intangible Assets [Line Items]    
Weighted Average Remaining Useful Lives 18 years 18 years
Intangible Assets, Gross $ 303 $ 291
Accumulated Amortization (113) (76)
Intangible Assets, Net $ 190 $ 215
Other    
Acquired Finite-Lived Intangible Assets [Line Items]    
Weighted Average Remaining Useful Lives 11 years 13 years
Intangible Assets, Gross $ 25 $ 25
Accumulated Amortization (15) (15)
Intangible Assets, Net 10 10
Trademarks/trade names    
Acquired Finite-Lived Intangible Assets [Line Items]    
Intangible Assets, Gross 50 50
Intangible Assets, Net $ 50 $ 50