Parent Company Only Condensed Consolidating Statements of Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
NET CASH FLOWS FROM OPERATING ACTIVITIES	$ 14,433	$ 14,925	$ 16,239
CASH FLOWS FROM INVESTING ACTIVITIES:
Net cash flows from investing activities	(11,127)	(9,114)	(7,754)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from exercise of stock options	22	5	44
Purchase of treasury stock	(3,215)	(10,277)	(15,431)
Net cash flows from financing activities	(3,242)	(5,767)	(8,885)
NET INCREASE IN CASH AND CASH EQUIVALENTS	64	44	(400)
CASH AND CASH EQUIVALENTS, beginning of period	709	645	601	$ 1,001
CASH AND CASH EQUIVALENTS, end of period	709	645	601	1,001
Parent Company [Member]
NET CASH FLOWS FROM OPERATING ACTIVITIES	(1,364)	(1,247)	(84)
CASH FLOWS FROM INVESTING ACTIVITIES:
Contribution to subsidiaries	(152)	(33)	(44)
Distributions from subsidiaries	4,711	11,246	15,516
Net cash flows from investing activities	4,559	11,213	15,472
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from exercise of stock options	22	5	44
Purchase of treasury stock	(3,215)	(10,277)	(15,431)
Net cash flows from financing activities	(3,195)	(9,966)	(15,388)
NET INCREASE IN CASH AND CASH EQUIVALENTS	0	0	0
CASH AND CASH EQUIVALENTS, beginning of period	0	0	0	0
CASH AND CASH EQUIVALENTS, end of period	0	0	0	$ 0
Parent Company [Member] | Related Party
CASH FLOWS FROM FINANCING ACTIVITIES:
Net cash flows from related party loans	$ (2)	$ 306	$ (1)