XML 154 R138.htm IDEA: XBRL DOCUMENT v3.25.0.1

Reinsurance - Components of Net Investment Income on Funds Withheld Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Reinsurance
Gross investment income	$ 1,103.1	$ 1,109.9	$ 869.9
Investment expenses	(35.8)	(23.7)	(20.5)
Net investment income	1,067.3	1,086.2	849.4
Fixed maturities, available-for-sale
Reinsurance
Gross investment income	825.9	856.9	745.9
Fixed maturities, trading
Reinsurance
Gross investment income	21.5	11.9	2.0
Equity securities
Reinsurance
Gross investment income		0.2	0.6
Mortgage loans
Reinsurance
Gross investment income	114.7	119.0	98.4
Cash and cash equivalents
Reinsurance
Gross investment income	52.8	57.9	18.2
Other
Reinsurance
Gross investment income	$ 88.2	$ 64.0	$ 4.8

X

- 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

Name:	pfg_FundsHeldUnderReinsuranceAgreementsAssetLineItems
Namespace Prefix:	pfg_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- Definition

Income on funds withheld assets passed to coinsurer, derived from investments and on cash and cash equivalents, net of amortization of purchase discounts and premiums related to investments in debt securities. Interest income represents earnings which reflect the time value of money or transactions in which the payments are for the use or forbearance of money. Dividend income represents a distribution of earnings to shareholders by investee companies. The purchase discount or premium is amortized to income or expense, respectively, over the life (holding period) of the securities to arrive at an amount of periodic interest income or expense which results in a constant effective yield on the investments.

+ References

No definition available.

+ Details

Name:	pfg_GrossInvestmentIncomeLossOnFundsWithheldAssets
Namespace Prefix:	pfg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Definition

Amount of expenses related to the generation of investment income on funds withheld assets.

+ References

No definition available.

+ Details

Name:	pfg_InvestmentIncomeInvestmentExpenseOnFundsWithheldAssets
Namespace Prefix:	pfg_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

X

- Definition

Amount, after investment expense, of income on funds withheld assets passed to coinsurer earned from investments in securities and real estate. Includes, but is not limited to, real estate investment, policy loans, dividends, and interest. Excludes realized gain (loss) on investments.

+ References

No definition available.

+ Details

Name:	pfg_NetInvestmentIncomeOnFundsWithheldAssets
Namespace Prefix:	pfg_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

X

- Details

Name:	pfg_FundsHeldUnderReinsuranceAgreementsAssetAxis=pfg_FixedMaturitiesSecuritiesAvailableForSaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	pfg_FundsHeldUnderReinsuranceAgreementsAssetAxis=pfg_FixedMaturitiesTradingMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	pfg_FundsHeldUnderReinsuranceAgreementsAssetAxis=us-gaap_EquitySecuritiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	pfg_FundsHeldUnderReinsuranceAgreementsAssetAxis=pfg_MortgageLoansMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	pfg_FundsHeldUnderReinsuranceAgreementsAssetAxis=pfg_AssetsCashAndCashEquivalentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

X

- Details

Name:	pfg_FundsHeldUnderReinsuranceAgreementsAssetAxis=us-gaap_OtherInvestmentsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: