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Future Policy Benefits and Claims - Interest Accretion and Current Discount Rates (Details)	Jun. 30, 2023	Dec. 31, 2022
Retirement and Income Solutions | Pension risk transfer
Future Policy Benefits and Claims
Interest accretion rate	4.42%	4.38%
Current discount rate	5.21%	5.31%
Retirement and Income Solutions | Individual fixed income annuities
Future Policy Benefits and Claims
Interest accretion rate	4.21%	4.22%
Current discount rate	5.21%	5.30%
Principal Asset Management | Principal International | Latin America | Individual fixed income annuities
Future Policy Benefits and Claims
Interest accretion rate	4.23%	4.24%
Current discount rate	2.81%	2.43%
Benefits and Protection | Specialty Benefits | Individual disability
Future Policy Benefits and Claims
Interest accretion rate	4.00%	4.03%
Current discount rate	5.24%	5.36%
Benefits and Protection | Life Insurance | Universal life
Future Policy Benefits and Claims
Interest accretion rate	4.73%	4.73%
Benefits and Protection | Life Insurance | Term life
Future Policy Benefits and Claims
Interest accretion rate	4.85%	4.89%
Current discount rate	5.18%	5.22%
Corporate | Long-term care insurance
Future Policy Benefits and Claims
Interest accretion rate	6.16%	6.16%
Current discount rate	5.22%	5.34%

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Current weighted-average discount rate used to measure liability for future policy benefit.

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