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Intangible Assets (Total Book Value of Intangible Assets ) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Intangible assets and goodwill [abstract]    
Intangible assets having a defined useful life $ 333 $ 317
Intangible assets having an indefinite useful life 534 353
Total intangible assets $ 867 $ 670