Accounts Receivable - Allowance for Doubtful Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning Balance	$ 45	$ 13	$ 11
Additions	19	41	24
Deductions	(25)	(9)	(22)
Ending Balance	39	45	13
Financing Receivable, Allowance for Credit Loss [Line Items]
Income tax expense (benefit)	197	221	255
Member's equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Partners' capital	$ 13,360	$ 13,139	13,724	$ 18,048
Cumulative Effect, Period of Adoption, Adjustment | Member's equity
Financing Receivable, Allowance for Credit Loss [Line Items]
Partners' capital			(3)	$ (39)
Income tax expense (benefit)			$ (2)