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Supplementary Financial Information - Other Current Liabilities (Details) - USD ($)
$ in Millions
Jun. 30, 2021
Dec. 31, 2020
Condensed Financial Information Disclosure [Abstract]    
Accrued liabilities $ 238 $ 229
Litigation related accruals 64 73
Current operating lease liabilities 72 81
Restructuring liabilities 4 1
Income tax payable 21 16
Other taxes payable 14 16
Other 33 34
Other current liabilities $ 446 $ 450