Parent Company Only Condensed Statements of Operations (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
REVENUES	$ 54,607	$ 54,022	$ 51,682
COSTS AND EXPENSES:
Operating costs and expenses	33,405	32,876	31,482
Other operating income, net	(53)	281	329
Income from operations	12,559	11,962	10,526
OTHER INCOME (EXPENSE):
Interest income (expense), net	(5,188)	(4,556)	(4,037)
Total other income (expenses), net	(5,705)	(4,500)	(4,138)
Income before income taxes	6,854	7,462	6,388
Income tax expense	(1,593)	(1,613)	(1,068)
Net income	4,557	5,055	4,654
Parent Company [Member]
REVENUES	1	4	5
COSTS AND EXPENSES:
Operating costs and expenses	1	4	5
Other operating income, net	(60)	0	0
Total costs and (income) expenses	(59)	4	5
Income from operations	60	0	0
OTHER INCOME (EXPENSE):
Interest income (expense), net	(4)	2	7
Equity in income of subsidiaries	6,021	6,587	5,632
Total other income (expenses), net	6,017	6,589	5,639
Income before income taxes	6,077	6,589	5,639
Income tax expense	(1,520)	(1,534)	(985)
Net income	$ 4,557	$ 5,055	$ 4,654