Consolidated Statements of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Statement of Cash Flows [Abstract]
Net cash provided by (used in) operating activities	$ 158	$ 523
Cash flows from investing activities
Sales, maturities and repayments of fixed maturity securities	1,644	3,950
Sales, maturities and repayments of equity securities	14	6
Sales, maturities and repayments of mortgage loans	480	255
Sales, maturities and repayments of limited partnerships and limited liability companies	69	77
Purchases of fixed maturity securities	(2,469)	(3,712)
Purchases of mortgage loans	(277)	(1,076)
Purchases of limited partnerships and limited liability companies	(178)	(110)
Cash received in connection with freestanding derivatives	3,411	313
Cash paid in connection with freestanding derivatives	(1,806)	(302)
Issuance of loan to affiliate	(100)	0
Net change in policy loans	39	34
Net change in short-term investments	(2,245)	(506)
Net change in other invested assets	18	50
Net cash provided by (used in) investing activities	(1,400)	(1,021)
Cash flows from financing activities
Policyholder account balances: Deposits	1,839	1,724
Policyholder account balances: Withdrawals	(473)	(893)
Net change in payables for collateral under securities loaned and other transactions	6,590	(1,070)
Long-term and short-term debt issued	100	412
Long-term and short-term debt repaid	0	(1)
Dividends paid to parent	(300)	0
Financing element on certain derivative instruments and other derivative related transactions, net	(486)	(11)
Other, net	(13)	(13)
Net cash provided by (used in) financing activities	7,257	148
Change in cash, cash equivalents and restricted cash	6,015	(350)
Cash, cash equivalents and restricted cash, beginning of period	2,493	3,494
Cash, cash equivalents and restricted cash, end of period	8,508	3,144
Supplemental disclosures of cash flow information
Net cash paid (received) for interest	34	1
Net cash paid (received) for income tax	$ 0	$ (1)