Discontinued Operations - Narrative (Details)	3 Months Ended		6 Months Ended
	Jun. 30, 2021 USD ($) subsidiary	Jun. 30, 2020 USD ($)	Jun. 30, 2021 USD ($) subsidiary	Jun. 30, 2020 USD ($)	Dec. 31, 2021 USD ($)	Dec. 31, 2020 USD ($)
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Deferred Policy Acquisition Costs and Present Value of Future Insurance Profits, Impairment Loss			$ 302,000,000
Premium Deficiency Testing Expense, Long-Duration Contract, Amount			221,000,000
Total loss recognition			523,000,000
Policyholder obligations reinsured	$ 11,400,000,000		11,400,000,000
Transfer from Investments			10,800,000,000
Reversal of Other Comprehensive Income	0		(913,000,000)
Premium receivable and reinsurance recoverable	13,550,000,000		13,550,000,000
Policyholder Benefits and Claims Incurred, Ceded			6,557,000,000
Net realized capital gains (losses)	$ (37,000,000)	$ (1,000,000)	1,705,000,000	$ (234,000,000)
Ceded Premiums Earned			6,017,000,000
Universal Life
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Policyholder Benefits and Claims Incurred, Ceded			$ 5,845,000,000
Individual Life Transaction | Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of subsidiaries to be discontinued | subsidiary	5		5
Cash consideration			$ 60,000,000
Equity interest in RLGH	$ 60,000,000		60,000,000
Principal amount in surplus notes that will be retained by the Company	123,000,000		123,000,000
Maximum amount of financial obligations guaranteed under limited guarantee provided by RLGH	1,300,000,000		1,300,000,000
Estimated loss on sale, net of tax	(1,458,000,000)		(1,458,000,000)			$ 1,466,000,000
Adjustment to loss on sale, net of tax			8,000,000	(242,000,000)
Policyholder Benefits and Claims Incurred, Ceded				$ 5,500,000,000
Cash proceeds agreed to defer			$ 100,000,000
Deferral period for receipt of cash proceeds (up to)			42 months
Individual Life Transaction | Forecast | Discontinued Operations, Held-for-sale | Subsequent Event
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Equity interest in RLGH					$ 225,000,000
reinsurance arrangements
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Purchase price	427,000,000		$ 427,000,000
net cost of reinsurance
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Noncash or Part Noncash Divestiture, Amount of Consideration Received			345,000,000
SLD
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Deposit Contracts, Assets	1,700,000,000		1,700,000,000
Disposal Group, Including Discontinued Operation, Intangible Assets	1,300,000,000		1,300,000,000
Premium receivable and reinsurance recoverable	$ 10,400,000,000		10,400,000,000
Ceded Premiums Earned			5,600,000,000
SLD | Discontinued Operations
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Amortization of Intangible Assets			26,000,000
Individual Life Transaction
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net realized capital gains (losses)			$ 1,900,000,000
RLI and VRIAC | SLD | Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Reinsurance agreement, reinsurance quota share, percent of respective individual life insurance and annuities of businesses	100.00%		100.00%
RLNY | SLD | Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Reinsurance agreement, reinsurance quota share, percent of respective individual life insurance and annuities of businesses	75.00%		75.00%