XML 55 R43.htm IDEA: XBRL DOCUMENT
v3.21.2

Investments - Gross Unrealized Losses for Fixed Maturities (Details) $ in Millions | Jun. 30, 2021 USD ($) item $ / shares | Dec. 31, 2020 USD ($) item
--- | --- | ---
Gross Unrealized Losses for Fixed Maturities |  |
Fixed maturities, Less than twelve months, Fair value | $ 8,214.1 | $ 5,909.4
Fixed maturities, Less than twelve months, Gross unrealized losses | 190.9 | 138.8
Fixed maturities, Greater than or equal to twelve months, Fair value | 1,847.2 | 1,399.1
Fixed maturities, Greater than or equal to twelve months, Gross unrealized losses | 83.4 | 67.4
Fixed maturities, Total, Fair value | 10,061.3 | 7,308.5
Fixed maturities, Total, Gross unrealized losses | 274.3 | 206.2
U.S. government and agencies |  |
Gross Unrealized Losses for Fixed Maturities |  |
Fixed maturities, Less than twelve months, Fair value | 537.2 | 351.1
Fixed maturities, Less than twelve months, Gross unrealized losses | 40.3 | 10.4
Fixed maturities, Total, Fair value | 537.2 | 351.1
Fixed maturities, Total, Gross unrealized losses | 40.3 | 10.4
Non-U.S. governments |  |
Gross Unrealized Losses for Fixed Maturities |  |
Fixed maturities, Less than twelve months, Fair value | 16.4 |
Fixed maturities, Less than twelve months, Gross unrealized losses | 0.1 |
Fixed maturities, Total, Fair value | 16.4 |
Fixed maturities, Total, Gross unrealized losses | 0.1 |
States and political subdivisions |  |
Gross Unrealized Losses for Fixed Maturities |  |
Fixed maturities, Less than twelve months, Fair value | 756.5 | 363.5
Fixed maturities, Less than twelve months, Gross unrealized losses | 17.1 | 12.5
Fixed maturities, Greater than or equal to twelve months, Fair value | 117.2 |
Fixed maturities, Greater than or equal to twelve months, Gross unrealized losses | 10.3 |
Fixed maturities, Total, Fair value | 873.7 | 363.5
Fixed maturities, Total, Gross unrealized losses | 27.4 | 12.5
Corporate debt securities |  |
Gross Unrealized Losses for Fixed Maturities |  |
Fixed maturities, Less than twelve months, Fair value | 3,082.8 | 1,578.7
Fixed maturities, Less than twelve months, Gross unrealized losses | 100.2 | 54.4
Fixed maturities, Greater than or equal to twelve months, Fair value | 583.7 | 267.9
Fixed maturities, Greater than or equal to twelve months, Gross unrealized losses | 39.6 | 40.6
Fixed maturities, Total, Fair value | 3,666.5 | 1,846.6
Fixed maturities, Total, Gross unrealized losses | 139.8 | 95.0
Residential mortgage-backed pass-through securities |  |
Gross Unrealized Losses for Fixed Maturities |  |
Fixed maturities, Less than twelve months, Fair value | 926.3 | 92.3
Fixed maturities, Less than twelve months, Gross unrealized losses | 11.4 | 0.2
Fixed maturities, Greater than or equal to twelve months, Fair value | 0.8 | 1.6
Fixed maturities, Total, Fair value | 927.1 | 93.9
Fixed maturities, Total, Gross unrealized losses | 11.4 | 0.2
Commercial mortgage-backed securities |  |
Gross Unrealized Losses for Fixed Maturities |  |
Fixed maturities, Less than twelve months, Fair value | 402.5 | 970.9
Fixed maturities, Less than twelve months, Gross unrealized losses | 5.7 | 22.1
Fixed maturities, Greater than or equal to twelve months, Fair value | 436.1 | 137.4
Fixed maturities, Greater than or equal to twelve months, Gross unrealized losses | 19.5 | 12.2
Fixed maturities, Total, Fair value | 838.6 | 1,108.3
Fixed maturities, Total, Gross unrealized losses | 25.2 | 34.3
Collateralized debt obligations |  |
Gross Unrealized Losses for Fixed Maturities |  |
Fixed maturities, Less than twelve months, Fair value | 1,009.6 | 1,750.6
Fixed maturities, Less than twelve months, Gross unrealized losses | 2.5 | 11.1
Fixed maturities, Greater than or equal to twelve months, Fair value | 528.1 | 931.1
Fixed maturities, Greater than or equal to twelve months, Gross unrealized losses | 8.2 | 12.9
Fixed maturities, Total, Fair value | 1,537.7 | 2,681.7
Fixed maturities, Total, Gross unrealized losses | 10.7 | 24.0
Other debt obligations |  |
Gross Unrealized Losses for Fixed Maturities |  |
Fixed maturities, Less than twelve months, Fair value | 1,482.8 | 802.3
Fixed maturities, Less than twelve months, Gross unrealized losses | 13.6 | 28.1
Fixed maturities, Greater than or equal to twelve months, Fair value | 181.3 | 61.1
Fixed maturities, Greater than or equal to twelve months, Gross unrealized losses | 5.8 | 1.7
Fixed maturities, Total, Fair value | 1,664.1 | 863.4
Fixed maturities, Total, Gross unrealized losses | 19.4 | 29.8
Principal Life Insurance Company |  |
Gross Unrealized Losses for Fixed Maturities |  |
Fixed maturities, Less than twelve months, Fair value | 6,884.9 | 5,638.3
Fixed maturities, Less than twelve months, Gross unrealized losses | 147.9 | 122.4
Fixed maturities, Greater than or equal to twelve months, Fair value | 1,761.5 | 1,391.3
Fixed maturities, Greater than or equal to twelve months, Gross unrealized losses | 63.3 | 51.5
Fixed maturities, Total, Fair value | 8,646.4 | 7,029.6
Fixed maturities, Total, Gross unrealized losses | $ 211.2 | $ 173.9
Available-for-sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure |  |
Available-for-sale Securities in Unrealized Loss Positions, Qualitative Disclosure, Percent Investment Grade (as a percent) | 88.00% | 89.00%
Available-for-sale Securities in Unrealized Loss Positions, Qualitative Disclosure, Average Price (percent of carrying value to amortized cost) | 98 | 98
Available-for-sale Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Less Than Twelve Months | item | 908 | 619
Available-for-sale Securities in Unrealized Loss Positions, Average Price, Less Than Twelve Months (percent of carrying value to amortized cost) | 98 | 98
Available-for-sale Securities in Unrealized Loss Positions, Percent Investment Grade, Less Than Twelve Months (as a percent) | 89.00% | 89.00%
Available-for-sale Securities in Unrealized Loss Position, Aggregate Losses On Investment Grade Investments, Less Than Twelve Months | $ 135.6 | $ 98.4
Available-for-sale Securities in Unrealized Loss Positions, Qualitative Disclosure, Number of Positions, Twelve Months or Longer | item | 292 | 198
Available-for-sale Securities in Unrealized Loss Positions, Average Price, Twelve Months or Longer (percent of carrying value to amortized cost) | item | 97 | 96
Principal Life Insurance Company | Corporate debt securities |  |
Gross Unrealized Losses for Fixed Maturities |  |
Fixed maturities, Greater than or equal to twelve months, Gross unrealized losses | $ 20.0 | $ 24.9
Available-for-sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure |  |
Available-for-sale Securities in Unrealized Loss Positions, Average Price, Twelve Months or Longer (percent of carrying value to amortized cost) | item | 96 | 92
Principal Life Insurance Company | Commercial mortgage-backed securities |  |
Gross Unrealized Losses for Fixed Maturities |  |
Fixed maturities, Greater than or equal to twelve months, Gross unrealized losses | $ 19.2 |
Fixed maturities, Total, Gross unrealized losses |  | $ 11.9
Available-for-sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure |  |
Available-for-sale Securities in Unrealized Loss Positions, Average Price, Twelve Months or Longer (percent of carrying value to amortized cost) | item | 96 | 92
Principal Life Insurance Company | Collateralized debt obligations |  |
Gross Unrealized Losses for Fixed Maturities |  |
Fixed maturities, Greater than or equal to twelve months, Gross unrealized losses | $ 8.2 | $ 12.9
Available-for-sale Securities, Continuous Unrealized Loss Position, Qualitative Disclosure |  |
Available-for-sale Securities in Unrealized Loss Positions, Average Price, Twelve Months or Longer (percent of carrying value to amortized cost) | item | 98 | 99

X
- Definition This item contains disclosure of the unrealized losses on investments in available-for-sale debt securities (without an allowance for credit loss) that have been in an unrealized loss position less than twelve months and deemed to be investment grade. + References No definition available. + Details
Name: | pfg_DebtSecuritiesAvailableForSaleSecuritiesWithoutAllowanceForCreditLossContinuousUnrealizedLossPositionAggregateLossesOnInvestmentGradeInvestmentsLessThanTwelveMonths
Namespace Prefix: | pfg_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition This item contains disclosure of the average price of investments in available-for-sale debt securities that are in an unrealized loss position without an allowance for credit loss. It is the calculated result of dividing the carrying value by amortized cost. + References No definition available. + Details
Name: | pfg_DebtSecuritiesAvailableForSaleSecuritiesWithoutAllowanceForCreditLossUnrealizedLossPositionsAveragePrice
Namespace Prefix: | pfg_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition This item contains disclosure of the average price of investments in available-for-sale debt securities without an allowance for credit loss that have been in a loss position for less than twelve months. It is the calculated result of dividing the carrying value by amortized cost. + References No definition available. + Details
Name: | pfg_DebtSecuritiesAvailableForSaleSecuritiesWithoutAllowanceForCreditLossUnrealizedLossPositionsAveragePriceLessThanTwelveMonths
Namespace Prefix: | pfg_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition This item contains disclosure of the average price of investments in available-for-sale debt securities without an allowance for credit loss that have been in an unrealized loss position for greater than or equal to twelve months. It is the calculated result of dividing the carrying value by amortized cost. + References No definition available. + Details
Name: | pfg_DebtSecuritiesAvailableForSaleSecuritiesWithoutAllowanceForCreditLossUnrealizedLossPositionsAveragePriceTwelveMonthsOrLonger
Namespace Prefix: | pfg_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition This item contains disclosure of the percent of investments in available-for-sale debt securities that are investment grade and in an unrealized loss position without an allowance for credit loss. + References No definition available. + Details
Name: | pfg_DebtSecuritiesAvailableForSaleSecuritiesWithoutAllowanceForCreditLossUnrealizedLossPositionsPercentInvestmentGrade
Namespace Prefix: | pfg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- Definition This item contains disclosure of the percent of investments in available-for-sale debt securities that are investment grade without an allowance for credit loss and have been in an unrealized loss position for less than twelve months. + References No definition available. + Details
Name: | pfg_DebtSecuritiesAvailableForSaleSecuritiesWithoutAllowanceForCreditLossUnrealizedLossPositionsPercentInvestmentGradeLessThanTwelveMonths
Namespace Prefix: | pfg_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | instant

X
- References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionFairValueAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_AvailableForSaleSecuritiesContinuousUnrealizedLossPositionQualitativeDisclosureAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for more than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922890-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27337-111563 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLonger
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922890-210455 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for 12 months or longer, without an allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922888-210455 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPosition12MonthsOrLongerNumberOfPositions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27337-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922890-210455 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12Months
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922890-210455 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27337-111563 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Number of investments in debt securities measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in continuous unrealized loss position for less than 12 months, without an allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (b)(3) -URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922888-210455 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleContinuousUnrealizedLossPositionLessThan12MonthsNumberOfPositions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

X
- Definition Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position without allowance for credit loss. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922888-210455 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 55 -Paragraph 8 -URI http://asc.fasb.org/extlink&oid=121590138&loc=SL82922954-210456 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPosition
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Amount of accumulated unrealized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), in unrealized loss position, without allowance for credit loss. Includes beneficial interest in securitized financial asset. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 50 -Paragraph 6 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=121645371&loc=d3e27290-111563 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 326 -SubTopic 30 -Section 50 -Paragraph 4 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=121582814&loc=SL82922888-210455 + Details
Name: | us-gaap_DebtSecuritiesAvailableForSaleUnrealizedLossPositionAccumulatedLoss
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USTreasuryAndGovernmentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ForeignGovernmentDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_USStatesAndPoliticalSubdivisionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CorporateDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ResidentialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CommercialMortgageBackedSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_CollateralizedDebtObligationsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_OtherDebtSecuritiesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=pfg_PrincipalLifeInsuranceCompanyConsolidatedMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |