Schedule II (BALANCE SHEETS - Parent Company Only) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Assets
Cash	$ 1,659	$ 1,747	$ 1,537
Other assets	11,792	8,822
Total assets	200,054	190,774
Liabilities
Accounts payable, accrued expenses, and other liabilities	15,004	14,052
Total liabilities	140,340	131,333
Stockholders' Equity Attributable to Parent [Abstract]
Common Shares	10,985	11,064
Common Shares in treasury (47,448,502 and 26,872,639 shares)	(7,464)	(3,644)
Retained earnings	47,365	39,337
Accumulated other comprehensive income	350	2,869
Total shareholders’ equity	59,714	59,441	55,331
Total liabilities and shareholders’ equity	200,054	190,774
Parent Company Only
Assets
Investments in subsidiaries and affiliates on equity basis	58,850	56,148
Total investments	58,850	56,148
Cash	1	84	$ 2	$ 1
Due from subsidiaries and affiliates, net	1,218	3,578
Other assets	16	10
Total assets	60,085	59,820
Liabilities
Affiliated notional cash pooling program	8	0
Accounts payable, accrued expenses, and other liabilities	363	379
Total liabilities	371	379
Stockholders' Equity Attributable to Parent [Abstract]
Common Shares	10,985	11,064
Common Shares in treasury (47,448,502 and 26,872,639 shares)	(7,464)	(3,644)
Additional paid-in capital	8,478	9,815
Retained earnings	47,365	39,337
Accumulated other comprehensive income	350	2,869
Total shareholders’ equity	59,714	59,441
Total liabilities and shareholders’ equity	$ 60,085	$ 59,820