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Goodwill and Intangible Assets (Narrative) (Details) - USD ($)
3 Months Ended 12 Months Ended
Jun. 30, 2020
Mar. 31, 2020
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Goodwill [Line Items]          
Goodwill impairment   $ 62,000,000 $ 0 $ 99,000,000 $ 0
Goodwill     $ 2,060,000,000 1,761,000,000 $ 1,265,000,000
Energy Solutions          
Goodwill [Line Items]          
Goodwill impairment $ 37,000,000        
Goodwill $ 19,000,000        
Energy Solutions | Trade Names          
Goodwill [Line Items]          
Impairment of indefinite lived intangible assets       $ 11,000,000