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Derivative Financial Instruments - Credit Derivatives Sold (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2025 | Dec. 31, 2024
Credit derivatives sold disclosures |  |
Notional amount | $ 573.3 | $ 470.0
Fair value | 1.1 | 17.4
Maximum future payments | $ 573.3 | $ 470.0
Weighted average expected life | 13 years 8 months 12 days | 15 years 10 months 24 days
Single name credit default swaps |  |
Credit derivatives sold disclosures |  |
Notional amount | $ 323.3 | $ 220.0
Fair value | 3.1 | 3.9
Maximum future payments | $ 323.3 | $ 220.0
Weighted average expected life | 2 years 6 months | 1 year 8 months 12 days
Single name credit default swaps | Corporate debt securities | AA |  |
Credit derivatives sold disclosures |  |
Notional amount | $ 56.7 |
Fair value | 0.2 |
Maximum future payments | $ 56.7 |
Weighted average expected life | 4 years 8 months 12 days |
Single name credit default swaps | Corporate debt securities | A |  |
Credit derivatives sold disclosures |  |
Notional amount | $ 86.6 | $ 40.0
Fair value | (0.3) | 0.2
Maximum future payments | $ 86.6 | $ 40.0
Weighted average expected life | 2 years 7 months 6 days | 6 months
Single name credit default swaps | Corporate debt securities | BBB |  |
Credit derivatives sold disclosures |  |
Notional amount | $ 160.0 | $ 160.0
Fair value | 3.2 | 3.6
Maximum future payments | $ 160.0 | $ 160.0
Weighted average expected life | 1 year 9 months 18 days | 2 years 1 month 6 days
Single name credit default swaps | Sovereign | A |  |
Credit derivatives sold disclosures |  |
Notional amount | $ 20.0 | $ 20.0
Fair value |  | 0.1
Maximum future payments | $ 20.0 | $ 20.0
Weighted average expected life | 2 months 12 days | 6 months
Single name total return swaps |  |
Credit derivatives sold disclosures |  |
Notional amount | $ 250.0 | $ 250.0
Fair value | (2.0) | 13.5
Maximum future payments | $ 250.0 | $ 250.0
Weighted average expected life | 28 years 2 months 12 days | 28 years 6 months
Single name total return swaps | Government/municipalities | AAA |  |
Credit derivatives sold disclosures |  |
Notional amount | $ 40.0 | $ 40.0
Fair value | (0.5) | 2.3
Maximum future payments | $ 40.0 | $ 40.0
Weighted average expected life | 30 years 3 months 18 days | 30 years 7 months 6 days
Single name total return swaps | Government/municipalities | AA |  |
Credit derivatives sold disclosures |  |
Notional amount | $ 130.0 | $ 130.0
Fair value | (1.8) | 6.4
Maximum future payments | $ 130.0 | $ 130.0
Weighted average expected life | 26 years 2 months 12 days | 26 years 6 months
Single name total return swaps | Government/municipalities | A |  |
Credit derivatives sold disclosures |  |
Notional amount | $ 80.0 | $ 80.0
Fair value | 0.3 | 4.8
Maximum future payments | $ 80.0 | $ 80.0
Weighted average expected life | 30 years 4 months 24 days | 30 years 8 months 12 days

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- Definition Discloses the notional amount of the credit derivatives sold (or each group of similar credit derivatives) as of the date of the statement of financial position. + References No definition available. + Details
Name: | pfg_CreditDerivativeSoldNotional
Namespace Prefix: | pfg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Discloses the fair value of the credit derivatives sold (or each group of similar credit derivatives) as of the date of the statement of financial position. + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition Represents the weighted-average expected life in years for credit derivatives sold. + References No definition available. + Details
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Balance Type: | na
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- Definition Maximum potential amount of future undiscounted payments that could be required under the credit derivative, before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4K -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4K + Details
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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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