Condensed Financial Information (Parent Company) (Condensed Balance Sheet) (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Investments:
Estimated Fair Value of Fixed Maturity Securities AFS	$ 340,274	$ 354,809
Short-term investments, principally at estimated fair value	7,176	3,904
Other invested assets, at estimated fair value	18,655	20,593
Total investments	494,821	508,519
Cash and cash equivalents	20,047	19,795
Accrued investment income	3,185	3,388
Other assets	11,615	11,685
Total assets	759,708	795,146
Liabilities
Payables for collateral under derivatives transactions	31,920	29,475
Junior subordinated debt securities	3,156	3,153
Other liabilities	22,538	23,614
Total liabilities	691,959	720,329
Stockholders’ Equity
Preferred stock, par value $0.01 per share; $3,905 and $4,405, respectively, aggregate liquidation preference	0	0
Common stock, par value $0.01 per share; 3,000,000,000 shares authorized; 1,186,540,473 and 1,181,614,288 shares issued, respectively; 825,540,267 and 892,910,600 shares outstanding, respectively	12	12
Additional paid-in capital	33,511	33,812
Retained earnings	41,197	36,491
Treasury stock, at cost; 361,000,206 and 288,703,688 shares, respectively	(18,157)	(13,829)
Accumulated other comprehensive income (loss)	10,919	18,072	$ 13,052	$ 1,722
Total stockholders’ equity	67,482	74,558
Total liabilities and stockholders' equity	$ 759,708	$ 795,146
Common stock, Shares Authorized	3,000,000,000	3,000,000,000
Parent Company
Investments:
Estimated Fair Value of Fixed Maturity Securities AFS	$ 2,745	$ 3,443
Short-term investments, principally at estimated fair value	0	156
Other invested assets, at estimated fair value	314	187
Total investments	3,059	3,786
Cash and cash equivalents	1,961	441	$ 377	$ 376
Accrued investment income	4	11
Investment in subsidiaries	80,165	88,684
Loans to subsidiaries	35	0
Other assets	798	966
Total assets	86,022	93,888
Liabilities
Payables for collateral under derivatives transactions	153	65
Long-term debt — unaffiliated	12,814	13,463
Long-term debt — affiliated	1,884	2,073
Junior subordinated debt securities	2,463	2,461
Other liabilities	1,226	1,268
Total liabilities	18,540	19,330
Stockholders’ Equity
Preferred stock, par value $0.01 per share; $3,905 and $4,405, respectively, aggregate liquidation preference	0	0
Common stock, par value $0.01 per share; 3,000,000,000 shares authorized; 1,186,540,473 and 1,181,614,288 shares issued, respectively; 825,540,267 and 892,910,600 shares outstanding, respectively	12	12
Additional paid-in capital	33,511	33,812
Retained earnings	41,197	36,491
Treasury stock, at cost; 361,000,206 and 288,703,688 shares, respectively	(18,157)	(13,829)
Accumulated other comprehensive income (loss)	10,919	18,072
Total stockholders’ equity	67,482	74,558
Total liabilities and stockholders' equity	$ 86,022	$ 93,888
Common stock, Shares Authorized	3,000,000,000	3,000,000,000