Schedule II (BALANCE SHEETS - Parent Company Only) (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Assets
Other assets	$ 7,317	$ 7,546
Total assets	230,682	199,017
Liabilities
Accounts Payable and Accrued Liabilities	8,332	7,148
Total liabilities	166,991	148,498
Stockholders' Equity Attributable to Parent [Abstract]
Common Shares	241	10,346
Common shares in treasury	4,400	5,113
Additional paid-in capital	15,665	7,166
Retained earnings	54,810	48,305
Accumulated other comprehensive income	(6,809)	(10,185)
Stockholders' Equity	59,507	50,519	$ 58,328
Total liabilities and shareholders’ equity	230,682	199,017
Parent Company Only
Assets
Investments in subsidiaries and affiliates on equity basis	59,952	50,372
Total investments	59,952	50,372
Cash, including restricted cash $172 and $115 (includes VIE balances of $117 and nil)	77	40	$ 1	$ 84
Other Receivables	717	959
Other assets	12	16
Total assets	60,758	51,387
Liabilities
Affiliated notional cash pooling program	594	252
Accounts Payable and Accrued Liabilities	657	616
Total liabilities	1,251	868
Stockholders' Equity Attributable to Parent [Abstract]
Common Shares	241	10,346
Common shares in treasury	4,400	5,113
Additional paid-in capital	15,665	7,166
Retained earnings	54,810	48,305
Accumulated other comprehensive income	(6,809)	(10,185)
Stockholders' Equity	59,507	50,519
Total liabilities and shareholders’ equity	$ 60,758	$ 51,387