Parent Company Only Condensed Consolidating Statements of Cash Flows (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
NET CASH FLOWS FROM OPERATING ACTIVITIES	$ 16,239	$ 14,562	$ 11,748
CASH FLOWS FROM INVESTING ACTIVITIES:
Net cash flows from investing activities	(7,754)	(8,157)	(7,331)
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from exercise of stock options	44	184	118
Issuance of equity	0	23	0
Purchase of treasury stock	(15,431)	(11,217)	(6,873)
Repayments of loans payable - related parties	(1)	(1)	0
Net cash flows from financing activities	(8,885)	(8,953)	(1,633)
NET INCREASE IN CASH AND CASH EQUIVALENTS	(400)	(2,548)	2,784
CASH AND CASH EQUIVALENTS, beginning of period	601	1,001	3,549	$ 765
CASH AND CASH EQUIVALENTS, end of period	601	1,001	3,549	765
Parent Company [Member]
NET CASH FLOWS FROM OPERATING ACTIVITIES	(84)	(49)	(36)
CASH FLOWS FROM INVESTING ACTIVITIES:
Contribution to subsidiaries	(44)	(208)	(119)
Distributions from subsidiaries	15,516	11,268	6,910
Net cash flows from investing activities	15,472	11,060	6,791
CASH FLOWS FROM FINANCING ACTIVITIES:
Proceeds from exercise of stock options	44	184	118
Issuance of equity	0	23	0
Purchase of treasury stock	(15,431)	(11,217)	(6,873)
Net cash flows from financing activities	(15,388)	(11,011)	(6,755)
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

Amount of cash and cash equivalents, and cash and cash equivalents restricted to withdrawal or usage. Excludes amount for disposal group and discontinued operations. Cash includes, but is not limited to, currency on hand, demand deposits with banks or financial institutions, and other accounts with general characteristics of demand deposits. Cash equivalents include, but are not limited to, short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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