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Property, Plant and Equipment (Table of Property and Equipment, net) (Parenthetical) (Details) - USD ($)
$ in Millions
Dec. 31, 2021
Dec. 31, 2020
Property Plant And Equipment [Line Items]    
Other property and equipment, net [1] $ 1,472 $ 957
CDM [Member]    
Property Plant And Equipment [Line Items]    
Other property and equipment, net $ 111 $ 102
[1]

$111 million and $102 million related to CDM in 2021 and 2020, respectively.