Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Statement of Cash Flows [Abstract]
Net cash provided by (used in) operating activities	$ 2,693	$ 4,459
Cash flows from investing activities
Sales, maturities and repayments of fixed maturity securities available-for-sale	40,034	42,055
Sales, maturities and repayments of equity securities	125	183
Sales, maturities and repayments of mortgage loans	5,057	5,065
Sales, maturities and repayments of real estate and real estate joint ventures	103	138
Sales, maturities and repayments of other limited partnership interests	160	402
Purchases of fixed maturity securities available-for-sale	(47,511)	(44,504)
Purchases of equity securities	(49)	(76)
Purchases of mortgage loans	(7,740)	(7,236)
Purchases of real estate and real estate joint ventures	(942)	(804)
Purchases of other limited partnership interests	(874)	(798)
Cash received in connection with freestanding derivatives	5,256	1,724
Cash paid in connection with freestanding derivatives	(2,017)	(2,462)
Net change in policy loans	12	(4)
Net change in short-term investments	(1,572)	1,202
Net change in other invested assets	65	65
Other, net	165	(92)
Net cash provided by (used in) investing activities	(9,728)	(5,142)
Cash flows from financing activities
Policyholder account balances: Deposits	50,120	45,511
Policyholder account balances: Withdrawals	(43,109)	(40,945)
Net change in payables for collateral under securities loaned and other transactions	7,401	725
Cash received for other transactions with tenors greater than three months	50	0
Cash paid for other transactions with tenors greater than three months	(50)	(200)
Long-term debt issued	1,074	1,382
Long-term debt repaid	(13)	(895)
Collateral financing arrangement repaid	(25)	(34)
Financing element on certain derivative instruments and other derivative related transactions, net	(242)	(14)
Treasury stock acquired in connection with share repurchases	(500)	(1,250)
Preferred stock issued, net of issuance costs	972	0
Dividends on preferred stock	(109)	(89)
Dividends on common stock	(823)	(824)
Other, net	91	(117)
Net cash provided by (used in) financing activities	14,837	3,250
Effect of change in foreign currency exchange rates on cash and cash equivalents balances	(111)	47
Change in cash and cash equivalents	7,691	2,614
Cash and cash equivalents, beginning of period	16,598	15,821
Cash and cash equivalents, end of period	24,289	18,435
Supplemental disclosures of cash flow information
Net cash paid for Interest	426	510
Net cash paid (received) for Income tax	130	756
Non-cash transactions:
Fixed maturity securities available-for-sale received in connection with pension risk transfer transactions	0	410
Operating lease liability associated with the recognition of right-of-use assets	52	216
Increase in policyholder account balances associated with funding agreement backed notes issued but not settled	$ 750	$ 0