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Separate Account Balances - Separate Account Liabilities (Details) - USD ($) $ in Millions	Jun. 30, 2023	Dec. 31, 2022	Dec. 31, 2021
Separate Account Balances
Separate account liabilities	$ 164,210.6	$ 155,375.1
Other balances
Separate Account Balances
Separate account liabilities	250.5	233.3
Retirement and Income Solutions
Separate Account Balances
Separate account liabilities	122,159.0	115,899.1
Retirement and Income Solutions | Group retirement contracts
Separate Account Balances
Separate account liabilities	113,055.7	107,240.1	$ 131,188.6
Retirement and Income Solutions | Individual variable annuities
Separate Account Balances
Separate account liabilities	9,103.3	8,659.0	11,000.0
Principal Asset Management | Principal International
Separate Account Balances
Separate account liabilities	36,217.5	34,231.7
Principal Asset Management | Principal International | Pension | Latin America
Separate Account Balances
Separate account liabilities	35,284.2	33,316.7	33,030.6
Principal Asset Management | Principal International | Guaranteed pension | Asia
Separate Account Balances
Separate account liabilities	933.3	915.0	971.3
Benefits and Protection | Life Insurance | Universal life
Separate Account Balances
Separate account liabilities	$ 5,583.6	$ 5,011.0	$ 5,886.1

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