Business and Basis of Presentation (Additional Insurance Reserves) (Details) - USD ($) $ in Millions	Jun. 30, 2023	Jun. 30, 2022	Jan. 01, 2021	Dec. 31, 2020
Liability for Future Policy Benefit, Activity [Line Items]
Balance	$ 314,408	$ 316,396
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Balance after transition, net of reinsurance recoverable	187,881	185,928
Other Businesses
Liability for Future Policy Benefit, Activity [Line Items]
Balance	1,707	2,043
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Less: Reinsurance recoverable	71	81
Balance after transition, net of reinsurance recoverable	$ 1,553	$ 1,852
Additional insurance reserves
Liability for Future Policy Benefit, Activity [Line Items]
Balance			$ 11,289
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Balance			10,103
Balance prior to transition, excluding amounts related to unrealized investment gains and losses			10,103
Amounts related to unrealized investment gains and losses after transition			1,186
Less: Reinsurance recoverable			4,387
Balance after transition, net of reinsurance recoverable			6,902
Additional insurance reserves | Unwinding amounts related to unrealized investment gains and losses
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Changes in cash flow assumptions and other activity			(1,615)
Additional insurance reserves | Reclassification of future policy benefits AIR to MRB
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Changes in cash flow assumptions and other activity			(916)
Additional insurance reserves | Reclassification of policyholders’ account balances AIR to MRB
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Changes in cash flow assumptions and other activity			(48)
Additional insurance reserves | Updates to certain universal life contract liabilities and other activity
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Changes in cash flow assumptions and other activity			1,779
Additional insurance reserves | Change in discount rate for annuitization benefits
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Changes in cash flow assumptions and other activity			116
Additional insurance reserves | As Previously Reported
Liability for Future Policy Benefit, Activity [Line Items]
Balance				$ 10,787
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Balance			9,172
Balance prior to transition, excluding amounts related to unrealized investment gains and losses			9,172
Additional insurance reserves | Other Businesses
Liability for Future Policy Benefit, Activity [Line Items]
Balance			360
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Balance			360
Balance prior to transition, excluding amounts related to unrealized investment gains and losses			360
Amounts related to unrealized investment gains and losses after transition			0
Less: Reinsurance recoverable			0
Balance after transition, net of reinsurance recoverable			360
Additional insurance reserves | Other Businesses | Unwinding amounts related to unrealized investment gains and losses
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Changes in cash flow assumptions and other activity			(106)
Additional insurance reserves | Other Businesses | Reclassification of future policy benefits AIR to MRB
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Changes in cash flow assumptions and other activity			(92)
Additional insurance reserves | Other Businesses | Reclassification of policyholders’ account balances AIR to MRB
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Changes in cash flow assumptions and other activity			(48)
Additional insurance reserves | Other Businesses | Updates to certain universal life contract liabilities and other activity
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Changes in cash flow assumptions and other activity			7
Additional insurance reserves | Other Businesses | Change in discount rate for annuitization benefits
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Changes in cash flow assumptions and other activity			116
Additional insurance reserves | Other Businesses | As Previously Reported
Liability for Future Policy Benefit, Activity [Line Items]
Balance				483
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Balance			377
Balance prior to transition, excluding amounts related to unrealized investment gains and losses			377
Additional insurance reserves | Individual Variable | Retirement Strategies
Liability for Future Policy Benefit, Activity [Line Items]
Balance			0
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Balance			0
Balance prior to transition, excluding amounts related to unrealized investment gains and losses			0
Amounts related to unrealized investment gains and losses after transition			0
Less: Reinsurance recoverable			0
Balance after transition, net of reinsurance recoverable			0
Additional insurance reserves | Individual Variable | Retirement Strategies | Unwinding amounts related to unrealized investment gains and losses
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Changes in cash flow assumptions and other activity			(65)
Additional insurance reserves | Individual Variable | Retirement Strategies | Reclassification of future policy benefits AIR to MRB
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Changes in cash flow assumptions and other activity			(824)
Additional insurance reserves | Individual Variable | Retirement Strategies | Reclassification of policyholders’ account balances AIR to MRB
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Changes in cash flow assumptions and other activity			0
Additional insurance reserves | Individual Variable | Retirement Strategies | Updates to certain universal life contract liabilities and other activity
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Changes in cash flow assumptions and other activity			0
Additional insurance reserves | Individual Variable | Retirement Strategies | Change in discount rate for annuitization benefits
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Changes in cash flow assumptions and other activity			0
Additional insurance reserves | Individual Variable | Retirement Strategies | As Previously Reported
Liability for Future Policy Benefit, Activity [Line Items]
Balance				889
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Balance			824
Balance prior to transition, excluding amounts related to unrealized investment gains and losses			824
Additional insurance reserves | Variable/ Universal Life | Individual Life
Liability for Future Policy Benefit, Activity [Line Items]
Balance			10,929
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Balance			9,743
Balance prior to transition, excluding amounts related to unrealized investment gains and losses			9,743
Amounts related to unrealized investment gains and losses after transition			1,186
Less: Reinsurance recoverable			4,387
Balance after transition, net of reinsurance recoverable			6,542
Additional insurance reserves | Variable/ Universal Life | Individual Life | Unwinding amounts related to unrealized investment gains and losses
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Changes in cash flow assumptions and other activity			(1,444)
Additional insurance reserves | Variable/ Universal Life | Individual Life | Reclassification of future policy benefits AIR to MRB
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Changes in cash flow assumptions and other activity			0
Additional insurance reserves | Variable/ Universal Life | Individual Life | Reclassification of policyholders’ account balances AIR to MRB
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Changes in cash flow assumptions and other activity			0
Additional insurance reserves | Variable/ Universal Life | Individual Life | Updates to certain universal life contract liabilities and other activity
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Changes in cash flow assumptions and other activity			1,772
Additional insurance reserves | Variable/ Universal Life | Individual Life | Change in discount rate for annuitization benefits
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Changes in cash flow assumptions and other activity			0
Additional insurance reserves | Variable/ Universal Life | Individual Life | As Previously Reported
Liability for Future Policy Benefit, Activity [Line Items]
Balance				$ 9,415
Liability for Future Policy Benefit, Expected Future Policy Benefit [Roll Forward]
Balance			7,971
Balance prior to transition, excluding amounts related to unrealized investment gains and losses			$ 7,971