Schedule II (BALANCE SHEETS - Parent Company Only) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Assets
Cash	$ 2,012	$ 1,659	$ 1,747
Other assets	12,736	11,792
Total assets	199,144	200,054
Liabilities
Accounts payable, accrued expenses, and other liabilities	15,587	15,004
Total liabilities	148,604	140,340
Stockholders' Equity Attributable to Parent [Abstract]
Common Shares	10,346	10,985
Common shares in treasury	5,113	7,464
Additional paid-in capital	7,166	8,478
Retained earnings	48,334	47,365
Accumulated other comprehensive income	(10,193)	350
Stockholders' Equity	50,540	59,714	59,441
Total liabilities and shareholders’ equity	199,144	200,054
Parent Company Only
Assets
Investments in subsidiaries and affiliates on equity basis	50,393	58,850
Total investments	50,393	58,850
Cash	40	1	$ 84	$ 2
Due from subsidiaries and affiliates, net	959	1,218
Other assets	16	16
Total assets	51,408	60,085
Liabilities
Affiliated notional cash pooling program	252	8
Accounts payable, accrued expenses, and other liabilities	616	363
Total liabilities	868	371
Stockholders' Equity Attributable to Parent [Abstract]
Common Shares	10,346	10,985
Common shares in treasury	5,113	7,464
Additional paid-in capital	7,166	8,478
Retained earnings	48,334	47,365
Accumulated other comprehensive income	(10,193)	350
Stockholders' Equity	50,540	59,714
Total liabilities and shareholders’ equity	$ 51,408	$ 60,085