Schedule II - Valuation and Qualifying Accounts (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
SEC Schedule, 12-09, Allowance, Credit Loss [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	$ 232	$ 255	$ 220
Additions	15	3	86
Write-offs, net of recoveries	(30)	(26)	(51)
Balance at end of year	217	232	255
SEC Schedule, 12-09, Valuation Allowance, Deferred Tax Asset [Member]
SEC Schedule, 12-09, Movement in Valuation Allowances and Reserves [Roll Forward]
Balance at beginning of year	5,034	4,922	4,786
Additions	63	115	138
Deductions	(1,014)	(3)	(2)
Balance at end of year	$ 4,083	$ 5,034	$ 4,922