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Market Risk Benefits - Unobservable Inputs for Fair Value Measurement (Details)	Jun. 30, 2023	Dec. 31, 2022
Retirement and Income Solutions | Individual variable annuities | Minimum | Long-term interest rate
Unobservable Inputs for Fair Value Measurement
Market risk benefits, measurement input	3.85	3.97
Retirement and Income Solutions | Individual variable annuities | Minimum | Long-term equity market volatility
Unobservable Inputs for Fair Value Measurement
Market risk benefits, measurement input	18.10	18.10
Retirement and Income Solutions | Individual variable annuities | Minimum | Nonperformance risk
Unobservable Inputs for Fair Value Measurement
Market risk benefits, measurement input	1.05	0.90
Retirement and Income Solutions | Individual variable annuities | Minimum | Lapse rate
Unobservable Inputs for Fair Value Measurement
Market risk benefits, measurement input	1.10	1.25
Retirement and Income Solutions | Individual variable annuities | Maximum | Long-term interest rate
Unobservable Inputs for Fair Value Measurement
Market risk benefits, measurement input	4.04	4.12
Retirement and Income Solutions | Individual variable annuities | Maximum | Long-term equity market volatility
Unobservable Inputs for Fair Value Measurement
Market risk benefits, measurement input	32.59	34.15
Retirement and Income Solutions | Individual variable annuities | Maximum | Nonperformance risk
Unobservable Inputs for Fair Value Measurement
Market risk benefits, measurement input	2.05	1.96
Retirement and Income Solutions | Individual variable annuities | Maximum | Lapse rate
Unobservable Inputs for Fair Value Measurement
Market risk benefits, measurement input	55.00	24.75
Retirement and Income Solutions | Individual variable annuities | Weighted average input | Long-term interest rate
Unobservable Inputs for Fair Value Measurement
Market risk benefits, measurement input	3.94	4.04
Retirement and Income Solutions | Individual variable annuities | Weighted average input | Long-term equity market volatility
Unobservable Inputs for Fair Value Measurement
Market risk benefits, measurement input	21.37	22.07
Retirement and Income Solutions | Individual variable annuities | Weighted average input | Nonperformance risk
Unobservable Inputs for Fair Value Measurement
Market risk benefits, measurement input	1.76	1.65
Retirement and Income Solutions | Individual variable annuities | Weighted average input | Lapse rate
Unobservable Inputs for Fair Value Measurement
Market risk benefits, measurement input	5.77	5.76
Principal Asset Management | Principal International | Guaranteed pension | Asia | Minimum | Long-term interest rate
Unobservable Inputs for Fair Value Measurement
Market risk benefits, measurement input	3.85	3.80
Principal Asset Management | Principal International | Guaranteed pension | Asia | Minimum | Long-term equity market volatility
Unobservable Inputs for Fair Value Measurement
Market risk benefits, measurement input	18.07	18.06
Principal Asset Management | Principal International | Guaranteed pension | Asia | Minimum | Nonperformance risk
Unobservable Inputs for Fair Value Measurement
Market risk benefits, measurement input	1.11	0.90
Principal Asset Management | Principal International | Guaranteed pension | Asia | Minimum | Lapse rate
Unobservable Inputs for Fair Value Measurement
Market risk benefits, measurement input	4.95	4.95
Principal Asset Management | Principal International | Guaranteed pension | Asia | Maximum | Long-term interest rate
Unobservable Inputs for Fair Value Measurement
Market risk benefits, measurement input	3.99	3.98
Principal Asset Management | Principal International | Guaranteed pension | Asia | Maximum | Long-term equity market volatility
Unobservable Inputs for Fair Value Measurement
Market risk benefits, measurement input	23.61	25.16
Principal Asset Management | Principal International | Guaranteed pension | Asia | Maximum | Nonperformance risk
Unobservable Inputs for Fair Value Measurement
Market risk benefits, measurement input	2.09	1.98
Principal Asset Management | Principal International | Guaranteed pension | Asia | Maximum | Lapse rate
Unobservable Inputs for Fair Value Measurement
Market risk benefits, measurement input	19.35	19.35
Principal Asset Management | Principal International | Guaranteed pension | Asia | Weighted average input | Long-term interest rate
Unobservable Inputs for Fair Value Measurement
Market risk benefits, measurement input	3.92	3.88
Principal Asset Management | Principal International | Guaranteed pension | Asia | Weighted average input | Long-term equity market volatility
Unobservable Inputs for Fair Value Measurement
Market risk benefits, measurement input	19.78	20.69
Principal Asset Management | Principal International | Guaranteed pension | Asia | Weighted average input | Nonperformance risk
Unobservable Inputs for Fair Value Measurement
Market risk benefits, measurement input	1.80	1.68
Principal Asset Management | Principal International | Guaranteed pension | Asia | Weighted average input | Lapse rate
Unobservable Inputs for Fair Value Measurement
Market risk benefits, measurement input	13.40	13.40

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Value of measurement input used to measure contract or contract feature in long-duration contract issued by insurance entity that both protects contract holder from other-than-nominal capital market risk and exposes insurance entity to other-than-nominal capital market risk.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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