Reinsurance - Reinsurance Recoverables by Range of External Credit Rating and Collateral Level (Details) $ in Millions	Jun. 30, 2022 USD ($)
Ceded Credit Risk [Line Items]
Reinsurance recoverables	$ 5,158
Allowance for uncollectible reinsurance	(30)
Total reinsurance recoverables	5,128
Fair value of collateral contractually required to meet or exceed carrying value of recoverable
Ceded Credit Risk [Line Items]
Reinsurance recoverables	1,127
Collateral provisions exist that may mitigate risk of credit loss
Ceded Credit Risk [Line Items]
Reinsurance recoverables	3,735
No collateral
Ceded Credit Risk [Line Items]
Reinsurance recoverables	296
Ongoing Operations
Ceded Credit Risk [Line Items]
Reinsurance recoverables	406
Ongoing Operations | A- equivalent and higher current ratings (
Ceded Credit Risk [Line Items]
Reinsurance recoverables	173
Ongoing Operations | BBB- to BBB+ equivalent current credit ratings
Ceded Credit Risk [Line Items]
Reinsurance recoverables	61
Ongoing Operations | Not rated
Ceded Credit Risk [Line Items]
Reinsurance recoverables	172
Ongoing Operations | Fair value of collateral contractually required to meet or exceed carrying value of recoverable
Ceded Credit Risk [Line Items]
Reinsurance recoverables	125
Ongoing Operations | Fair value of collateral contractually required to meet or exceed carrying value of recoverable | A- equivalent and higher current ratings (
Ceded Credit Risk [Line Items]
Reinsurance recoverables	0
Ongoing Operations | Fair value of collateral contractually required to meet or exceed carrying value of recoverable | BBB- to BBB+ equivalent current credit ratings
Ceded Credit Risk [Line Items]
Reinsurance recoverables	0
Ongoing Operations | Fair value of collateral contractually required to meet or exceed carrying value of recoverable | Not rated
Ceded Credit Risk [Line Items]
Reinsurance recoverables	125
Ongoing Operations | Collateral provisions exist that may mitigate risk of credit loss
Ceded Credit Risk [Line Items]
Reinsurance recoverables	4
Ongoing Operations | Collateral provisions exist that may mitigate risk of credit loss | A- equivalent and higher current ratings (
Ceded Credit Risk [Line Items]
Reinsurance recoverables	0
Ongoing Operations | Collateral provisions exist that may mitigate risk of credit loss | BBB- to BBB+ equivalent current credit ratings
Ceded Credit Risk [Line Items]
Reinsurance recoverables	0
Ongoing Operations | Collateral provisions exist that may mitigate risk of credit loss | Not rated
Ceded Credit Risk [Line Items]
Reinsurance recoverables	4
Ongoing Operations | No collateral
Ceded Credit Risk [Line Items]
Reinsurance recoverables	277
Ongoing Operations | No collateral | A- equivalent and higher current ratings (
Ceded Credit Risk [Line Items]
Reinsurance recoverables	173
Ongoing Operations | No collateral | BBB- to BBB+ equivalent current credit ratings
Ceded Credit Risk [Line Items]
Reinsurance recoverables	61
Ongoing Operations | No collateral | Not rated
Ceded Credit Risk [Line Items]
Reinsurance recoverables	43
Acquisition, disposition or run-off activities
Ceded Credit Risk [Line Items]
Reinsurance recoverables	4,752
Acquisition, disposition or run-off activities | A- equivalent and higher current ratings ( | Lincoln National Life and Lincoln Life & Annuity of New York
Ceded Credit Risk [Line Items]
Reinsurance recoverables	2,870
Acquisition, disposition or run-off activities | A- equivalent and higher current ratings ( | Berkshire Hathaway Life Insurance Company of Nebraska
Ceded Credit Risk [Line Items]
Reinsurance recoverables	688
Acquisition, disposition or run-off activities | A- equivalent and higher current ratings ( | Prudential Retirement Insurance and Annuity (marketed under Empower brand)
Ceded Credit Risk [Line Items]
Reinsurance recoverables	140
Acquisition, disposition or run-off activities | A- equivalent and higher current ratings ( | Prudential Insurance Company of America
Ceded Credit Risk [Line Items]
Reinsurance recoverables	394
Acquisition, disposition or run-off activities | A- equivalent and higher current ratings ( | Life Insurance Company of North America
Ceded Credit Risk [Line Items]
Reinsurance recoverables	401
Acquisition, disposition or run-off activities | A- equivalent and higher current ratings ( | Other
Ceded Credit Risk [Line Items]
Reinsurance recoverables	243
Acquisition, disposition or run-off activities | Not rated
Ceded Credit Risk [Line Items]
Reinsurance recoverables	16
Acquisition, disposition or run-off activities | Fair value of collateral contractually required to meet or exceed carrying value of recoverable
Ceded Credit Risk [Line Items]
Reinsurance recoverables	1,002
Acquisition, disposition or run-off activities | Fair value of collateral contractually required to meet or exceed carrying value of recoverable | A- equivalent and higher current ratings ( | Lincoln National Life and Lincoln Life & Annuity of New York
Ceded Credit Risk [Line Items]
Reinsurance recoverables	0
Acquisition, disposition or run-off activities | Fair value of collateral contractually required to meet or exceed carrying value of recoverable | A- equivalent and higher current ratings ( | Berkshire Hathaway Life Insurance Company of Nebraska
Ceded Credit Risk [Line Items]
Reinsurance recoverables	260
Acquisition, disposition or run-off activities | Fair value of collateral contractually required to meet or exceed carrying value of recoverable | A- equivalent and higher current ratings ( | Prudential Retirement Insurance and Annuity (marketed under Empower brand)
Ceded Credit Risk [Line Items]
Reinsurance recoverables	140
Acquisition, disposition or run-off activities | Fair value of collateral contractually required to meet or exceed carrying value of recoverable | A- equivalent and higher current ratings ( | Prudential Insurance Company of America
Ceded Credit Risk [Line Items]
Reinsurance recoverables	394
Acquisition, disposition or run-off activities | Fair value of collateral contractually required to meet or exceed carrying value of recoverable | A- equivalent and higher current ratings ( | Life Insurance Company of North America
Ceded Credit Risk [Line Items]
Reinsurance recoverables	0
Acquisition, disposition or run-off activities | Fair value of collateral contractually required to meet or exceed carrying value of recoverable | A- equivalent and higher current ratings ( | Other
Ceded Credit Risk [Line Items]
Reinsurance recoverables	208
Acquisition, disposition or run-off activities | Fair value of collateral contractually required to meet or exceed carrying value of recoverable | Not rated
Ceded Credit Risk [Line Items]
Reinsurance recoverables	0
Acquisition, disposition or run-off activities | Collateral provisions exist that may mitigate risk of credit loss
Ceded Credit Risk [Line Items]
Reinsurance recoverables	3,731
Acquisition, disposition or run-off activities | Collateral provisions exist that may mitigate risk of credit loss | A- equivalent and higher current ratings ( | Lincoln National Life and Lincoln Life & Annuity of New York
Ceded Credit Risk [Line Items]
Reinsurance recoverables	2,870
Acquisition, disposition or run-off activities | Collateral provisions exist that may mitigate risk of credit loss | A- equivalent and higher current ratings ( | Berkshire Hathaway Life Insurance Company of Nebraska
Ceded Credit Risk [Line Items]
Reinsurance recoverables	428
Acquisition, disposition or run-off activities | Collateral provisions exist that may mitigate risk of credit loss | A- equivalent and higher current ratings ( | Prudential Retirement Insurance and Annuity (marketed under Empower brand)
Ceded Credit Risk [Line Items]
Reinsurance recoverables	0
Acquisition, disposition or run-off activities | Collateral provisions exist that may mitigate risk of credit loss | A- equivalent and higher current ratings ( | Prudential Insurance Company of America
Ceded Credit Risk [Line Items]
Reinsurance recoverables	0
Acquisition, disposition or run-off activities | Collateral provisions exist that may mitigate risk of credit loss | A- equivalent and higher current ratings ( | Life Insurance Company of North America
Ceded Credit Risk [Line Items]
Reinsurance recoverables	401
Acquisition, disposition or run-off activities | Collateral provisions exist that may mitigate risk of credit loss | A- equivalent and higher current ratings ( | Other
Ceded Credit Risk [Line Items]
Reinsurance recoverables	19
Acquisition, disposition or run-off activities | Collateral provisions exist that may mitigate risk of credit loss | Not rated
Ceded Credit Risk [Line Items]
Reinsurance recoverables	13
Acquisition, disposition or run-off activities | No collateral
Ceded Credit Risk [Line Items]
Reinsurance recoverables	19
Acquisition, disposition or run-off activities | No collateral | A- equivalent and higher current ratings ( | Lincoln National Life and Lincoln Life & Annuity of New York
Ceded Credit Risk [Line Items]
Reinsurance recoverables	0
Acquisition, disposition or run-off activities | No collateral | A- equivalent and higher current ratings ( | Berkshire Hathaway Life Insurance Company of Nebraska
Ceded Credit Risk [Line Items]
Reinsurance recoverables	0
Acquisition, disposition or run-off activities | No collateral | A- equivalent and higher current ratings ( | Prudential Retirement Insurance and Annuity (marketed under Empower brand)
Ceded Credit Risk [Line Items]
Reinsurance recoverables	0
Acquisition, disposition or run-off activities | No collateral | A- equivalent and higher current ratings ( | Prudential Insurance Company of America
Ceded Credit Risk [Line Items]
Reinsurance recoverables	0
Acquisition, disposition or run-off activities | No collateral | A- equivalent and higher current ratings ( | Life Insurance Company of North America
Ceded Credit Risk [Line Items]
Reinsurance recoverables	0
Acquisition, disposition or run-off activities | No collateral | A- equivalent and higher current ratings ( | Other
Ceded Credit Risk [Line Items]
Reinsurance recoverables	16
Acquisition, disposition or run-off activities | No collateral | Not rated
Ceded Credit Risk [Line Items]
Reinsurance recoverables	$ 3