SCHEDULE II - VALUATION AND QUALIFYING ACCOUNTS (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Allowance for doubtful accounts
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at  Beginning of Period	$ 132	$ 132	$ 136
Charged to Cost and and Expenses	6	42	16
Deductions	(41)	(42)	(20)
Balance at End of Period	97	132	132
Deferred tax valuation allowance
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at  Beginning of Period	214	192	348
Charged to Cost and and Expenses	(20)	12	(150)
Deductions	1	10	(6)
Balance at End of Period	$ 195	$ 214	$ 192