SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Allowance for loss on receivables:
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance  at Beginning of Period	$ 72	$ 69	$ 79
Charged (Credited)  to Costs and Expenses	21	36	(1)
Charged to other accounts	(3)	(1)	0
Deductions or Write-offs	(7)	(32)	(9)
Balance at End  of Period	83	72	69
Deferred tax asset valuation allowance:
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance  at Beginning of Period	37	45	54
Charged (Credited)  to Costs and Expenses	(28)	8	9
Charged to other accounts	0	0	0
Deductions or Write-offs	0	0	0
Balance at End  of Period	$ 65	$ 37	$ 45