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Closed Block (Closed Block Liabilities and Assets Designated to Closed Block; Maximum Future Earnings to be Recognized) (Details) - USD ($) $ in Millions	Mar. 31, 2021	Dec. 31, 2020
Closed Block liabilities
Future policy benefits	$ 46,392	$ 46,762
Policyholders’ dividends payable	651	635
Policyholders’ dividend obligation	6,410	8,787
Policyholders’ account balances	4,839	4,874
Other Closed Block liabilities	3,358	3,141
Total Closed Block liabilities	61,650	64,199
Closed Block assets
Fixed maturities, available-for-sale, at fair value	38,687	41,959
Fixed maturities, trading, at fair value	271	277
Equity securities, at fair value	2,563	2,345
Commercial mortgage and other loans	8,297	8,421
Policy loans	3,984	4,064
Other invested assets	3,730	3,610
Short-term investments	132	124
Total investments	57,664	60,800
Cash and cash equivalents	811	269
Accrued investment income	453	431
Other Closed Block assets	129	92
Total Closed Block assets	59,057	61,592
Excess of reported Closed Block liabilities over Closed Block assets	2,593	2,607
Portion of above representing accumulated other comprehensive income (loss):
Net unrealized investment gains (losses)	3,189	5,810
Allocated to policyholder dividend obligation	(3,244)	(5,867)
Future earnings to be recognized from Closed Block assets and Closed Block liabilities	$ 2,538	$ 2,550

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The sum of cash, cash equivalents, investments and other assets allocated to the segregated group of participating or dividend-paying policies and contracts identified as the closed block.

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