$PFG
PRINCIPAL FINANCIAL GROUP INC Stock $pfg

$pfg Overview Financials Valuation SEC Filings Company Website

2013 Q4 Form 10-Q Financial Statement

#000110465913079067 Filed on October 30, 2013

Income Statement

Concept	2013 Q4	2013 Q3	2012 Q3
Revenue	$2.673B	$2.240B	$2.705B
YoY Change	16.41%	-17.2%	29.19%
Cost Of Revenue		$1.096B	$1.647B
YoY Change		-33.44%	47.73%
Gross Profit		$1.143B	$1.058B
YoY Change		8.1%	8.07%
Gross Profit Margin		51.05%	39.11%
Selling, General & Admin	$44.70M	$48.50M	$49.70M
YoY Change	-7.26%	-2.41%	-4.79%
% of Gross Profit		4.24%	4.7%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$90.50M	$73.70M	$116.9M
YoY Change	-9.77%	-36.95%	-22.53%
% of Gross Profit		6.45%	11.05%
Operating Expenses	$2.363B	$1.919B	$2.513B
YoY Change	16.42%	-23.63%	29.37%
Operating Profit		-$775.9M	-$1.455B
YoY Change		-46.69%	51.01%
Interest Expense
YoY Change
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$309.9M	$320.3M	$191.6M
YoY Change	16.29%	67.17%	26.8%
Income Tax	$59.50M	$61.20M	-$7.200M
% Of Pretax Income	19.2%	19.11%	-3.76%
Net Earnings	$250.4M	$253.9M	$195.4M
YoY Change	12.19%	29.94%	143.95%
Net Earnings / Revenue	9.37%	11.34%	7.22%
Basic Earnings Per Share	$0.79	$0.83	$0.64
Diluted Earnings Per Share	$0.78	$0.82	$0.63
COMMON SHARES
Basic Shares Outstanding	294.4M shares	294.9M shares	294.7M shares
Diluted Shares Outstanding		298.6M shares	297.5M shares

Balance Sheet

Concept	2013 Q4	2013 Q3	2012 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$2.372B	$1.707B	$2.279B
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables
Other Receivables
Total Short-Term Assets
YoY Change
LONG-TERM ASSETS
Property, Plant & Equipment	$500.7M	$479.1M	$468.4M
YoY Change	7.86%	2.28%	4.55%
Goodwill	$1.100B	$1.128B	$548.9M
YoY Change	102.48%	105.41%
Intangibles	$1.459B	$1.497B	$927.4M
YoY Change	59.51%	61.46%
Long-Term Investments	$880.0M	$900.4M	$837.7M
YoY Change	1.27%	7.48%	-98.73%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$208.2B	$201.7B	$159.2B
YoY Change	28.65%	26.69%	11.87%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$150.6M	$175.5M	$28.50M
YoY Change	269.12%	515.79%	-61.49%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$156.0M	$184.0M	$36.00M
YoY Change	178.57%	411.11%	-53.25%
LONG-TERM LIABILITIES
Long-Term Debt	$2.601B	$2.593B	$2.180B
YoY Change	-2.62%	18.94%	38.85%
Other Long-Term Liabilities	$5.224B	$5.387B	$5.974B
YoY Change	-15.0%	-9.83%	-4.66%
Total Long-Term Liabilities	$7.825B	$7.980B	$8.154B
YoY Change	-11.25%	-2.13%	4.06%
TOTAL LIABILITIES
Total Short-Term Liabilities	$156.0M	$184.0M	$36.00M
Total Long-Term Liabilities	$7.825B	$7.980B	$8.154B
Total Liabilities	$198.2B	$192.1B	$149.3B
YoY Change	30.32%	28.67%	12.26%
SHAREHOLDERS EQUITY
Retained Earnings	$5.405B	$5.250B	$4.784B
YoY Change	11.18%	9.73%
Common Stock	$4.600M	$4.600M	$4.500M
YoY Change	2.22%	2.22%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$5.708B	$5.708B	$5.554B
YoY Change	2.77%	2.76%
Treasury Stock Shares	164.1M shares	164.1M shares	159.7M shares
Shareholders Equity	$9.684B	$9.278B	$9.828B
YoY Change
Total Liabilities & Shareholders Equity	$208.2B	$201.7B	$159.2B
YoY Change	28.65%	26.69%	11.87%

Cashflow Statement

Concept	2013 Q4	2013 Q3	2012 Q3
OPERATING ACTIVITIES
Net Income	$250.4M	$253.9M	$195.4M
YoY Change	12.19%	29.94%	143.95%
Depreciation, Depletion And Amortization	$90.50M	$73.70M	$116.9M
YoY Change	-9.77%	-36.95%	-22.53%
Cash From Operating Activities	$823.3M	$614.3M	$871.7M
YoY Change	16.43%	-29.53%	772.57%
INVESTING ACTIVITIES
Capital Expenditures	-$36.70M	-$10.80M	-$10.90M
YoY Change	1012.12%	-0.92%	-22.7%
Acquisitions
YoY Change
Other Investing Activities	$243.2M	$500.6M	-$881.5M
YoY Change	118.71%	-156.79%	1.45%
Cash From Investing Activities	$206.5M	$489.8M	-$892.4M
YoY Change	91.38%	-154.89%	1.06%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	-365.1M	-507.5M	653.1M
YoY Change	-133.71%	-177.71%	1269.18%
NET CHANGE
Cash From Operating Activities	823.3M	614.3M	871.7M
Cash From Investing Activities	206.5M	489.8M	-892.4M
Cash From Financing Activities	-365.1M	-507.5M	653.1M
Net Change In Cash	664.7M	596.6M	632.4M
YoY Change	-64.98%	-5.66%	-185.99%
FREE CASH FLOW
Cash From Operating Activities	$823.3M	$614.3M	$871.7M
Capital Expenditures	-$36.70M	-$10.80M	-$10.90M
Free Cash Flow	$860.0M	$625.1M	$882.6M
YoY Change	21.06%	-29.18%	674.21%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2013Q3	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-25300000	USD
CY2012Q3	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-51600000	USD
	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-78800000	USD
	us-gaap	Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net DerivativeInstrumentsNotDesignatedAsHedgingInstrumentsGainLossNet	-2400000	USD
CY2013Q3	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2013Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	298600000	shares
	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	2373700000	USD
	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
CY2012Q3	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.35	pure
	pfg	Defined Benefit Plan Employer Contributions Minimum Annual DefinedBenefitPlanEmployerContributionsMinimumAnnual	0	USD
CY2013Q3	pfg	Defined Benefit Plan Estimated Future Employer Contributions Qualified And Nonqualified Plan Low End Of Range DefinedBenefitPlanEstimatedFutureEmployerContributionsQualifiedAndNonqualifiedPlanLowEndOfRange	81000000	USD
CY2013Q3	pfg	Defined Benefit Plan Estimated Future Employer Contributions Qualified And Nonqualified Plan High End Of Range DefinedBenefitPlanEstimatedFutureEmployerContributionsQualifiedAndNonqualifiedPlanHighEndOfRange	110000000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-40900000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeBeforeTax	8400000	USD
CY2013Q3	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	27000000	USD
	us-gaap	Defined Benefit Plan Contributions By Employer DefinedBenefitPlanContributionsByEmployer	81000000	USD
CY2008	pfg	Proceeds From Termination Of Certain Structured Transactions And Resulting Prepayment ProceedsFromTerminationOfCertainStructuredTransactionsAndResultingPrepayment	440000000	USD
CY2013Q3	us-gaap	Guarantee Obligations Maximum Exposure GuaranteeObligationsMaximumExposure	255000000	USD
CY2013Q3	us-gaap	Loss Contingency Estimate Of Possible Loss LossContingencyEstimateOfPossibleLoss	0	USD
CY2013Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Available For Sale Securities Before Tax AdjustmentsForAssumedChangesInAmortizationPatternsAvailableForSaleSecuritiesBeforeTax	-29300000	USD
CY2013Q3	pfg	Adjustments For Assumed Changes In Liability For Policyholder Benefits And Claims Before Tax AdjustmentsForAssumedChangesInLiabilityForPolicyholderBenefitsAndClaimsBeforeTax	-54100000	USD
CY2013Q3	pfg	Other Comprehensive Income Available For Sale Securities Period Increase Decrease Before Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseBeforeTax	50900000	USD
CY2013Q3	pfg	Other Comprehensive Income Noncredit Impairment Losses Arising During Period Before Tax OtherComprehensiveIncomeNoncreditImpairmentLossesArisingDuringPeriodBeforeTax	-9300000	USD
CY2013Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Other Than Temporary Impairment Losses Before Tax AdjustmentsForAssumedChangesInAmortizationPatternsOtherThanTemporaryImpairmentLossesBeforeTax	-13700000	USD
CY2013Q3	pfg	Adjustments For Assumed Changes In Policyholder Liabilities Other Than Temporary Impairment Losses Before Tax AdjustmentsForAssumedChangesInPolicyholderLiabilitiesOtherThanTemporaryImpairmentLossesBeforeTax	-200000	USD
CY2013Q3	pfg	Other Comprehensive Income Reclassification Adjustment Before Tax OtherComprehensiveIncomeReclassificationAdjustmentBeforeTax	4600000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	-45700000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeBeforeTax	1900000	USD
CY2013Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Derivatives Before Tax AdjustmentsForAssumedChangesInAmortizationPatternsDerivativesBeforeTax	-2600000	USD
CY2013Q3	pfg	Adjustments For Assumed Changes In Policyholder Liabilities Derivatives Before Tax AdjustmentsForAssumedChangesInPolicyholderLiabilitiesDerivativesBeforeTax	-2700000	USD
CY2013Q3	pfg	Other Comprehensive Income Derivatives Period Increase Decrease Before Tax OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseBeforeTax	-38500000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-32000000	USD
CY2013Q3	pfg	Other Comprehensive Income Reclassification Of Defined Benefit Plans Prior Service Cost And Net Gain Loss Recognized In Net Periodic Benefit Cost Before Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansPriorServiceCostAndNetGainLossRecognizedInNetPeriodicBenefitCostBeforeTax	-21200000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-21200000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-3000000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-9100000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	2900000	USD
CY2013Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Available For Sale Securities Tax AdjustmentsForAssumedChangesInAmortizationPatternsAvailableForSaleSecuritiesTax	-10300000	USD
CY2013Q3	pfg	Adjustments For Assumed Changes In Liability For Policyholder Benefits And Claims Tax AdjustmentsForAssumedChangesInLiabilityForPolicyholderBenefitsAndClaimsTax	-17500000	USD
CY2013Q3	pfg	Other Comprehensive Income Available For Sale Securities Period Increase Decrease Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseTax	21600000	USD
CY2013Q3	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Tax Including Portion Attributable To Noncontrolling Interest Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities	-2900000	USD
CY2013Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Other Than Temporary Impairment Losses Tax AdjustmentsForAssumedChangesInAmortizationPatternsOtherThanTemporaryImpairmentLossesTax	-4900000	USD
CY2013Q3	pfg	Adjustments For Assumed Changes In Policyholder Liabilities Other Than Temporary Impairment Losses Tax AdjustmentsForAssumedChangesInPolicyholderLiabilitiesOtherThanTemporaryImpairmentLossesTax	-100000	USD
CY2013Q3	pfg	Other Comprehensive Income Reclassification Adjustment Tax OtherComprehensiveIncomeReclassificationAdjustmentTax	2100000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-15900000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeTax	800000	USD
CY2013Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Derivatives Tax AdjustmentsForAssumedChangesInAmortizationPatternsDerivativesTax	-1000000	USD
CY2013Q3	pfg	Adjustments For Assumed Changes In Policyholder Liabilities Derivatives Tax AdjustmentsForAssumedChangesInPolicyholderLiabilitiesDerivativesTax	-700000	USD
CY2013Q3	pfg	Other Comprehensive Income Derivatives Period Increase Decrease Tax OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseTax	-13400000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	1500000	USD
CY2013Q3	pfg	Other Comprehensive Income Reclassification Of Defined Benefit Plans Prior Service Cost And Net Gain Loss Recognized In Net Periodic Benefit Cost Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansPriorServiceCostAndNetGainLossRecognizedInNetPeriodicBenefitCostTax	-7400000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-7400000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	15000000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-31800000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	5500000	USD
CY2013Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Available For Sale Securities Net Of Tax AdjustmentsForAssumedChangesInAmortizationPatternsAvailableForSaleSecuritiesNetOfTax	-19000000	USD
CY2013Q3	pfg	Adjustments For Assumed Changes In Liability For Policyholder Benefits And Claims Net Of Tax AdjustmentsForAssumedChangesInLiabilityForPolicyholderBenefitsAndClaimsNetOfTax	-36600000	USD
CY2013Q3	pfg	Other Comprehensive Income Available For Sale Securities Period Increase Decrease Net Of Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax	29300000	USD
CY2013Q3	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Net Of Tax Including Portion Attributable To Noncontrolling Interest Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities	-6400000	USD
CY2013Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Noncredit Impairment Losses Net Of Tax AdjustmentsForAssumedChangesInAmortizationPatternsNoncreditImpairmentLossesNetOfTax	-8800000	USD
CY2013Q3	pfg	Adjustments For Assumed Changes In Policyholder Liabilities Other Than Temporary Impairment Losses Net Of Tax AdjustmentsForAssumedChangesInPolicyholderLiabilitiesOtherThanTemporaryImpairmentLossesNetOfTax	-100000	USD
CY2013Q3	pfg	Other Comprehensive Income Reclassification Adjustment Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentNetOfTax	2500000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-29800000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	1100000	USD
CY2013Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Derivatives Net Of Tax AdjustmentsForAssumedChangesInAmortizationPatternsDerivativesNetOfTax	-1600000	USD
CY2013Q3	pfg	Adjustments For Assumed Changes In Policyholder Liabilities Derivatives Net Of Tax AdjustmentsForAssumedChangesInPolicyholderLiabilitiesDerivativesNetOfTax	-2000000	USD
CY2013Q3	pfg	Other Comprehensive Income Derivatives Period Increase Decrease Net Of Tax OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTax	-25100000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-33500000	USD
CY2013Q3	pfg	Other Comprehensive Income Reclassification Of Defined Benefit Plans Prior Service Cost And Net Gain Loss Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansPriorServiceCostAndNetGainLossRecognizedInNetPeriodicBenefitCostNetOfTax	-13800000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-13800000	USD
CY2013Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-18000000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	-1578400000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-905800000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeBeforeTax	66800000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Available For Sale Securities Before Tax AdjustmentsForAssumedChangesInAmortizationPatternsAvailableForSaleSecuritiesBeforeTax	-241100000	USD
	pfg	Adjustments For Assumed Changes In Liability For Policyholder Benefits And Claims Before Tax AdjustmentsForAssumedChangesInLiabilityForPolicyholderBenefitsAndClaimsBeforeTax	-505700000	USD
	pfg	Other Comprehensive Income Available For Sale Securities Period Increase Decrease Before Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseBeforeTax	-764800000	USD
	pfg	Other Comprehensive Income Noncredit Impairment Losses Arising During Period Before Tax OtherComprehensiveIncomeNoncreditImpairmentLossesArisingDuringPeriodBeforeTax	8800000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Other Than Temporary Impairment Losses Before Tax AdjustmentsForAssumedChangesInAmortizationPatternsOtherThanTemporaryImpairmentLossesBeforeTax	-13600000	USD
	pfg	Adjustments For Assumed Changes In Policyholder Liabilities Other Than Temporary Impairment Losses Before Tax AdjustmentsForAssumedChangesInPolicyholderLiabilitiesOtherThanTemporaryImpairmentLossesBeforeTax	800000	USD
	pfg	Other Comprehensive Income Reclassification Adjustment Before Tax OtherComprehensiveIncomeReclassificationAdjustmentBeforeTax	21600000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	-31700000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeBeforeTax	1600000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Derivatives Before Tax AdjustmentsForAssumedChangesInAmortizationPatternsDerivativesBeforeTax	-9000000	USD
	pfg	Adjustments For Assumed Changes In Policyholder Liabilities Derivatives Before Tax AdjustmentsForAssumedChangesInPolicyholderLiabilitiesDerivativesBeforeTax	-15300000	USD
	pfg	Other Comprehensive Income Derivatives Period Increase Decrease Before Tax OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseBeforeTax	-5800000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-177300000	USD
	pfg	Other Comprehensive Income Reclassification Of Defined Benefit Plans Prior Service Cost And Net Gain Loss Recognized In Net Periodic Benefit Cost Before Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansPriorServiceCostAndNetGainLossRecognizedInNetPeriodicBenefitCostBeforeTax	-63700000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-63700000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	-511600000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	22700000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Available For Sale Securities Tax AdjustmentsForAssumedChangesInAmortizationPatternsAvailableForSaleSecuritiesTax	-84400000	USD
	pfg	Adjustments For Assumed Changes In Liability For Policyholder Benefits And Claims Tax AdjustmentsForAssumedChangesInLiabilityForPolicyholderBenefitsAndClaimsTax	-163400000	USD
	pfg	Other Comprehensive Income Available For Sale Securities Period Increase Decrease Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseTax	-241100000	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Tax Including Portion Attributable To Noncontrolling Interest Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities	3900000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Other Than Temporary Impairment Losses Tax AdjustmentsForAssumedChangesInAmortizationPatternsOtherThanTemporaryImpairmentLossesTax	-4900000	USD
	pfg	Adjustments For Assumed Changes In Policyholder Liabilities Other Than Temporary Impairment Losses Tax AdjustmentsForAssumedChangesInPolicyholderLiabilitiesOtherThanTemporaryImpairmentLossesTax	300000	USD
	pfg	Other Comprehensive Income Reclassification Adjustment Tax OtherComprehensiveIncomeReclassificationAdjustmentTax	8500000	USD
CY2012Q3	pfg	Other Comprehensive Income Derivatives Period Increase Decrease Tax OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseTax	-9700000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-11700000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeTax	800000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Derivatives Tax AdjustmentsForAssumedChangesInAmortizationPatternsDerivativesTax	-3200000	USD
	pfg	Adjustments For Assumed Changes In Policyholder Liabilities Derivatives Tax AdjustmentsForAssumedChangesInPolicyholderLiabilitiesDerivativesTax	-5300000	USD
	pfg	Other Comprehensive Income Derivatives Period Increase Decrease Tax OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseTax	-2400000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	-7800000	USD
	pfg	Other Comprehensive Income Reclassification Of Defined Benefit Plans Prior Service Cost And Net Gain Loss Recognized In Net Periodic Benefit Cost Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansPriorServiceCostAndNetGainLossRecognizedInNetPeriodicBenefitCostTax	-22300000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-22300000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-237500000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	-1066800000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	44100000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Available For Sale Securities Net Of Tax AdjustmentsForAssumedChangesInAmortizationPatternsAvailableForSaleSecuritiesNetOfTax	-156700000	USD
	pfg	Adjustments For Assumed Changes In Liability For Policyholder Benefits And Claims Net Of Tax AdjustmentsForAssumedChangesInLiabilityForPolicyholderBenefitsAndClaimsNetOfTax	-342300000	USD
	pfg	Other Comprehensive Income Available For Sale Securities Period Increase Decrease Net Of Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax	-523700000	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Net Of Tax Including Portion Attributable To Noncontrolling Interest Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities	4900000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Noncredit Impairment Losses Net Of Tax AdjustmentsForAssumedChangesInAmortizationPatternsNoncreditImpairmentLossesNetOfTax	-8700000	USD
	pfg	Adjustments For Assumed Changes In Policyholder Liabilities Other Than Temporary Impairment Losses Net Of Tax AdjustmentsForAssumedChangesInPolicyholderLiabilitiesOtherThanTemporaryImpairmentLossesNetOfTax	500000	USD
	pfg	Other Comprehensive Income Reclassification Adjustment Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentNetOfTax	13100000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-20000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	800000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Derivatives Net Of Tax AdjustmentsForAssumedChangesInAmortizationPatternsDerivativesNetOfTax	-5800000	USD
	pfg	Adjustments For Assumed Changes In Policyholder Liabilities Derivatives Net Of Tax AdjustmentsForAssumedChangesInPolicyholderLiabilitiesDerivativesNetOfTax	-10000000	USD
	pfg	Other Comprehensive Income Derivatives Period Increase Decrease Net Of Tax OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTax	-3400000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-169500000	USD
	pfg	Other Comprehensive Income Reclassification Of Defined Benefit Plans Prior Service Cost And Net Gain Loss Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansPriorServiceCostAndNetGainLossRecognizedInNetPeriodicBenefitCostNetOfTax	-41400000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-41400000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-668300000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	810700000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeBeforeTax	56400000	USD
CY2012Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Available For Sale Securities Before Tax AdjustmentsForAssumedChangesInAmortizationPatternsAvailableForSaleSecuritiesBeforeTax	145800000	USD
CY2012Q3	pfg	Adjustments For Assumed Changes In Liability For Policyholder Benefits And Claims Before Tax AdjustmentsForAssumedChangesInLiabilityForPolicyholderBenefitsAndClaimsBeforeTax	271500000	USD
CY2012Q3	pfg	Other Comprehensive Income Available For Sale Securities Period Increase Decrease Before Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseBeforeTax	449800000	USD
CY2012Q3	pfg	Other Comprehensive Income Noncredit Impairment Losses Arising During Period Before Tax OtherComprehensiveIncomeNoncreditImpairmentLossesArisingDuringPeriodBeforeTax	9200000	USD
CY2012Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Other Than Temporary Impairment Losses Before Tax AdjustmentsForAssumedChangesInAmortizationPatternsOtherThanTemporaryImpairmentLossesBeforeTax	3000000	USD
CY2012Q3	pfg	Other Comprehensive Income Reclassification Adjustment Before Tax OtherComprehensiveIncomeReclassificationAdjustmentBeforeTax	6200000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	-23900000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeBeforeTax	-500000	USD
CY2012Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Derivatives Before Tax AdjustmentsForAssumedChangesInAmortizationPatternsDerivativesBeforeTax	3500000	USD
CY2012Q3	pfg	Other Comprehensive Income Derivatives Period Increase Decrease Before Tax OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseBeforeTax	-27900000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	46000000	USD
CY2012Q3	pfg	Other Comprehensive Income Reclassification Of Defined Benefit Plans Prior Service Cost And Net Gain Loss Recognized In Net Periodic Benefit Cost Before Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansPriorServiceCostAndNetGainLossRecognizedInNetPeriodicBenefitCostBeforeTax	-13400000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-13400000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	475100000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	273000000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	20300000	USD
CY2012Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Available For Sale Securities Tax AdjustmentsForAssumedChangesInAmortizationPatternsAvailableForSaleSecuritiesTax	51100000	USD
CY2012Q3	pfg	Adjustments For Assumed Changes In Liability For Policyholder Benefits And Claims Tax AdjustmentsForAssumedChangesInLiabilityForPolicyholderBenefitsAndClaimsTax	88400000	USD
CY2012Q3	pfg	Other Comprehensive Income Available For Sale Securities Period Increase Decrease Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseTax	153800000	USD
CY2012Q3	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Tax Including Portion Attributable To Noncontrolling Interest Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities	3200000	USD
CY2012Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Other Than Temporary Impairment Losses Tax AdjustmentsForAssumedChangesInAmortizationPatternsOtherThanTemporaryImpairmentLossesTax	1000000	USD
CY2012Q3	pfg	Other Comprehensive Income Reclassification Adjustment Tax OtherComprehensiveIncomeReclassificationAdjustmentTax	2200000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-8300000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeTax	-200000	USD
CY2012Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Derivatives Tax AdjustmentsForAssumedChangesInAmortizationPatternsDerivativesTax	1200000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	600000	USD
CY2012Q3	pfg	Other Comprehensive Income Reclassification Of Defined Benefit Plans Prior Service Cost And Net Gain Loss Recognized In Net Periodic Benefit Cost Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansPriorServiceCostAndNetGainLossRecognizedInNetPeriodicBenefitCostTax	-4700000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-4700000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	147200000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	537700000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	36100000	USD
CY2012Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Available For Sale Securities Net Of Tax AdjustmentsForAssumedChangesInAmortizationPatternsAvailableForSaleSecuritiesNetOfTax	94700000	USD
CY2012Q3	pfg	Adjustments For Assumed Changes In Liability For Policyholder Benefits And Claims Net Of Tax AdjustmentsForAssumedChangesInLiabilityForPolicyholderBenefitsAndClaimsNetOfTax	183100000	USD
CY2012Q3	pfg	Other Comprehensive Income Available For Sale Securities Period Increase Decrease Net Of Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax	296000000	USD
CY2012Q3	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Net Of Tax Including Portion Attributable To Noncontrolling Interest Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities	6000000	USD
CY2012Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Noncredit Impairment Losses Net Of Tax AdjustmentsForAssumedChangesInAmortizationPatternsNoncreditImpairmentLossesNetOfTax	2000000	USD
CY2012Q3	pfg	Other Comprehensive Income Reclassification Adjustment Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentNetOfTax	4000000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-15600000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	-300000	USD
CY2012Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Derivatives Net Of Tax AdjustmentsForAssumedChangesInAmortizationPatternsDerivativesNetOfTax	2300000	USD
CY2012Q3	pfg	Other Comprehensive Income Derivatives Period Increase Decrease Net Of Tax OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTax	-18200000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	45400000	USD
CY2012Q3	pfg	Other Comprehensive Income Reclassification Of Defined Benefit Plans Prior Service Cost And Net Gain Loss Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansPriorServiceCostAndNetGainLossRecognizedInNetPeriodicBenefitCostNetOfTax	-8700000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-8700000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	327900000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodBeforeTax	1436700000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeBeforeTax	96500000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Available For Sale Securities Before Tax AdjustmentsForAssumedChangesInAmortizationPatternsAvailableForSaleSecuritiesBeforeTax	225400000	USD
	pfg	Adjustments For Assumed Changes In Liability For Policyholder Benefits And Claims Before Tax AdjustmentsForAssumedChangesInLiabilityForPolicyholderBenefitsAndClaimsBeforeTax	474100000	USD
	pfg	Other Comprehensive Income Available For Sale Securities Period Increase Decrease Before Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseBeforeTax	833700000	USD
	pfg	Other Comprehensive Income Noncredit Impairment Losses Arising During Period Before Tax OtherComprehensiveIncomeNoncreditImpairmentLossesArisingDuringPeriodBeforeTax	31200000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Other Than Temporary Impairment Losses Before Tax AdjustmentsForAssumedChangesInAmortizationPatternsOtherThanTemporaryImpairmentLossesBeforeTax	8500000	USD
	pfg	Other Comprehensive Income Reclassification Adjustment Before Tax OtherComprehensiveIncomeReclassificationAdjustmentBeforeTax	22700000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	5600000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeBeforeTax	10200000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Derivatives Before Tax AdjustmentsForAssumedChangesInAmortizationPatternsDerivativesBeforeTax	-26400000	USD
	pfg	Other Comprehensive Income Derivatives Period Increase Decrease Before Tax OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseBeforeTax	42200000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	5500000	USD
	pfg	Other Comprehensive Income Reclassification Of Defined Benefit Plans Prior Service Cost And Net Gain Loss Recognized In Net Periodic Benefit Cost Before Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansPriorServiceCostAndNetGainLossRecognizedInNetPeriodicBenefitCostBeforeTax	-40300000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-40300000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	899000000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	468400000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	34300000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Available For Sale Securities Tax AdjustmentsForAssumedChangesInAmortizationPatternsAvailableForSaleSecuritiesTax	78900000	USD
	pfg	Adjustments For Assumed Changes In Liability For Policyholder Benefits And Claims Tax AdjustmentsForAssumedChangesInLiabilityForPolicyholderBenefitsAndClaimsTax	148100000	USD
	pfg	Other Comprehensive Income Available For Sale Securities Period Increase Decrease Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseTax	275700000	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Tax Including Portion Attributable To Noncontrolling Interest Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities	10900000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Other Than Temporary Impairment Losses Tax AdjustmentsForAssumedChangesInAmortizationPatternsOtherThanTemporaryImpairmentLossesTax	3000000	USD
	pfg	Other Comprehensive Income Reclassification Adjustment Tax OtherComprehensiveIncomeReclassificationAdjustmentTax	7900000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	2000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeTax	3700000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Derivatives Tax AdjustmentsForAssumedChangesInAmortizationPatternsDerivativesTax	-9300000	USD
	pfg	Other Comprehensive Income Derivatives Period Increase Decrease Tax OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseTax	15000000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	-16000000	USD
	pfg	Other Comprehensive Income Reclassification Of Defined Benefit Plans Prior Service Cost And Net Gain Loss Recognized In Net Periodic Benefit Cost Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansPriorServiceCostAndNetGainLossRecognizedInNetPeriodicBenefitCostTax	-14100000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-14100000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	280900000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	968300000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	62200000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Available For Sale Securities Net Of Tax AdjustmentsForAssumedChangesInAmortizationPatternsAvailableForSaleSecuritiesNetOfTax	146500000	USD
	pfg	Adjustments For Assumed Changes In Liability For Policyholder Benefits And Claims Net Of Tax AdjustmentsForAssumedChangesInLiabilityForPolicyholderBenefitsAndClaimsNetOfTax	326000000	USD
	pfg	Other Comprehensive Income Available For Sale Securities Period Increase Decrease Net Of Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax	558000000	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Net Of Tax Including Portion Attributable To Noncontrolling Interest Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossNetOfTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities	20300000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Noncredit Impairment Losses Net Of Tax AdjustmentsForAssumedChangesInAmortizationPatternsNoncreditImpairmentLossesNetOfTax	5500000	USD
	pfg	Other Comprehensive Income Reclassification Adjustment Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentNetOfTax	14800000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	3600000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	6500000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Derivatives Net Of Tax AdjustmentsForAssumedChangesInAmortizationPatternsDerivativesNetOfTax	-17100000	USD
	pfg	Other Comprehensive Income Derivatives Period Increase Decrease Net Of Tax OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTax	27200000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	21500000	USD
	pfg	Other Comprehensive Income Reclassification Of Defined Benefit Plans Prior Service Cost And Net Gain Loss Recognized In Net Periodic Benefit Cost Net Of Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansPriorServiceCostAndNetGainLossRecognizedInNetPeriodicBenefitCostNetOfTax	-26200000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-26200000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	618100000	USD
CY2011Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	22200000	USD
	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	1600000	USD
	pfg	Distributions To Redeemable Noncontrolling Interest DistributionsToRedeemableNoncontrollingInterest	1300000	USD
	pfg	Foreign Currency Transaction Attributable To Redeemable Noncontrolling Interest ForeignCurrencyTransactionAttributableToRedeemableNoncontrollingInterest	900000	USD
CY2012Q3	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	61000000	USD
CY2013Q3	pfg	Fixed Maturity Securities Level3 Valued Using Internal Pricing Models FixedMaturitySecuritiesLevel3ValuedUsingInternalPricingModels	0.01	pure
CY2012Q4	pfg	Separate Account With Shares Of Principal Financial Group Stock SeparateAccountWithSharesOfPrincipalFinancialGroupStock	148300000	USD
CY2013Q3	pfg	Separate Account With Shares Of Principal Financial Group Stock SeparateAccountWithSharesOfPrincipalFinancialGroupStock	201100000	USD
CY2013Q3	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	2239600000	USD
CY2012Q3	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	2756800000	USD
	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	6666900000	USD
	us-gaap	Business Acquisitions Pro Forma Revenue BusinessAcquisitionsProFormaRevenue	7073600000	USD
CY2013Q3	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	259100000	USD
CY2012Q3	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	224100000	USD
	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	706400000	USD
	us-gaap	Business Acquisitions Pro Forma Net Income Loss BusinessAcquisitionsProFormaNetIncomeLoss	679800000	USD
CY2013Q3	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	0.83
CY2012Q3	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	0.76
	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	2.40
	us-gaap	Business Acquisition Pro Forma Earnings Per Share Basic BusinessAcquisitionProFormaEarningsPerShareBasic	2.28
CY2013Q3	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	0.82
CY2012Q3	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	0.75
	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	2.37
	us-gaap	Business Acquisition Pro Forma Earnings Per Share Diluted BusinessAcquisitionProFormaEarningsPerShareDiluted	2.26
CY2012Q4	pfg	Total Assets Unconsolidated Money Market Mutual Fund Variable Interest Entities TotalAssetsUnconsolidatedMoneyMarketMutualFundVariableInterestEntities	1500000000	USD
CY2013Q3	pfg	Total Assets Unconsolidated Money Market Mutual Fund Variable Interest Entities TotalAssetsUnconsolidatedMoneyMarketMutualFundVariableInterestEntities	1400000000	USD
CY2013Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	2929800000	USD
CY2013Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	13024200000	USD
CY2013Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	8659600000	USD
CY2013Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	11334100000	USD
CY2013Q3	pfg	Available For Sale Securities Debt Maturities With Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithSingleMaturityDateAmortizedCost	35947700000	USD
CY2013Q3	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	11155600000	USD
CY2013Q3	us-gaap	Available For Sale Securities Debt Maturities Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAmortizedCost	47103300000	USD
CY2013Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	2973100000	USD
CY2013Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	13658800000	USD
CY2013Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	9127700000	USD
CY2013Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	12035900000	USD
CY2013Q3	pfg	Available For Sale Securities Debt Maturities With Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithSingleMaturityDateFairValue	37795500000	USD
CY2013Q3	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	11119400000	USD
CY2013Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	48914900000	USD
CY2013Q3	pfg	Available For Sale Debt Securities Gross Realized Gain AvailableForSaleDebtSecuritiesGrossRealizedGain	5800000	USD
	pfg	Available For Sale Debt Securities Gross Realized Gain AvailableForSaleDebtSecuritiesGrossRealizedGain	27600000	USD
CY2012Q3	pfg	Available For Sale Debt Securities Gross Realized Gain AvailableForSaleDebtSecuritiesGrossRealizedGain	3000000	USD
	pfg	Available For Sale Debt Securities Gross Realized Gain AvailableForSaleDebtSecuritiesGrossRealizedGain	22700000	USD
CY2013Q3	pfg	Available For Sale Debt Securities Gross Realized Loss AvailableForSaleDebtSecuritiesGrossRealizedLoss	18200000	USD
	pfg	Available For Sale Debt Securities Gross Realized Loss AvailableForSaleDebtSecuritiesGrossRealizedLoss	98600000	USD
CY2012Q3	pfg	Available For Sale Debt Securities Gross Realized Loss AvailableForSaleDebtSecuritiesGrossRealizedLoss	44100000	USD
	pfg	Available For Sale Debt Securities Gross Realized Loss AvailableForSaleDebtSecuritiesGrossRealizedLoss	131000000	USD
CY2013Q3	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities	9300000	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities	-8800000	USD
CY2013Q3	pfg	Available For Sale Debt Securities Hedging Net AvailableForSaleDebtSecuritiesHedgingNet	-9600000	USD
	pfg	Available For Sale Debt Securities Hedging Net AvailableForSaleDebtSecuritiesHedgingNet	-99400000	USD
CY2013Q3	pfg	Trading Debt Securities Realized Gain Loss TradingDebtSecuritiesRealizedGainLoss	2100000	USD
	pfg	Trading Debt Securities Realized Gain Loss TradingDebtSecuritiesRealizedGainLoss	-4100000	USD
CY2013Q3	pfg	Available For Sale Equity Securities Gross Realized Gain AvailableForSaleEquitySecuritiesGrossRealizedGain	700000	USD
	pfg	Available For Sale Equity Securities Gross Realized Gain AvailableForSaleEquitySecuritiesGrossRealizedGain	800000	USD
	pfg	Available For Sale Equity Securities Gross Realized Loss AvailableForSaleEquitySecuritiesGrossRealizedLoss	100000	USD
CY2013Q3	pfg	Trading Equity Securities Realized Gain Loss TradingEquitySecuritiesRealizedGainLoss	100000	USD
	pfg	Trading Equity Securities Realized Gain Loss TradingEquitySecuritiesRealizedGainLoss	11600000	USD
CY2013Q3	pfg	Mortgage Loan Realized Gain Loss MortgageLoanRealizedGainLoss	-3300000	USD
	pfg	Mortgage Loan Realized Gain Loss MortgageLoanRealizedGainLoss	-20300000	USD
CY2013Q3	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-34800000	USD
	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-4800000	USD
CY2013Q3	pfg	Other Realized Gain Loss OtherRealizedGainLoss	15600000	USD
	pfg	Other Realized Gain Loss OtherRealizedGainLoss	-3400000	USD
CY2013Q3	us-gaap	Gain Loss On Investments GainLossOnInvestments	-50900000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	-181900000	USD
CY2012Q3	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities	-9200000	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Before Tax Including Portion Attributable To Noncontrolling Interest Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossBeforeTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities	-31200000	USD
CY2012Q3	pfg	Available For Sale Debt Securities Hedging Net AvailableForSaleDebtSecuritiesHedgingNet	1000000	USD
	pfg	Available For Sale Debt Securities Hedging Net AvailableForSaleDebtSecuritiesHedgingNet	7700000	USD
CY2012Q3	pfg	Trading Debt Securities Realized Gain Loss TradingDebtSecuritiesRealizedGainLoss	4700000	USD
	pfg	Trading Debt Securities Realized Gain Loss TradingDebtSecuritiesRealizedGainLoss	5700000	USD
CY2012Q3	pfg	Available For Sale Equity Securities Gross Realized Gain AvailableForSaleEquitySecuritiesGrossRealizedGain	500000	USD
	pfg	Available For Sale Equity Securities Gross Realized Gain AvailableForSaleEquitySecuritiesGrossRealizedGain	600000	USD
CY2012Q3	pfg	Available For Sale Equity Securities Gross Realized Loss AvailableForSaleEquitySecuritiesGrossRealizedLoss	600000	USD
	pfg	Available For Sale Equity Securities Gross Realized Loss AvailableForSaleEquitySecuritiesGrossRealizedLoss	600000	USD
CY2012Q3	pfg	Trading Equity Securities Realized Gain Loss TradingEquitySecuritiesRealizedGainLoss	-100000	USD
	pfg	Trading Equity Securities Realized Gain Loss TradingEquitySecuritiesRealizedGainLoss	30600000	USD
CY2012Q3	pfg	Mortgage Loan Realized Gain Loss MortgageLoanRealizedGainLoss	-23300000	USD
	pfg	Mortgage Loan Realized Gain Loss MortgageLoanRealizedGainLoss	-44600000	USD
CY2012Q3	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-50500000	USD
	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-20100000	USD
CY2012Q3	pfg	Other Realized Gain Loss OtherRealizedGainLoss	187900000	USD
	pfg	Other Realized Gain Loss OtherRealizedGainLoss	179000000	USD
CY2012Q3	us-gaap	Gain Loss On Investments GainLossOnInvestments	87700000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	81200000	USD
CY2012Q3	us-gaap	Available For Sale Securities Gross Realized Gains Losses Sale Proceeds AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds	236100000	USD
	us-gaap	Available For Sale Securities Gross Realized Gains Losses Sale Proceeds AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds	952200000	USD
CY2013Q3	us-gaap	Available For Sale Securities Gross Realized Gains Losses Sale Proceeds AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds	415700000	USD
	us-gaap	Available For Sale Securities Gross Realized Gains Losses Sale Proceeds AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds	1516000000	USD
	pfg	Results Of Operations Acquiree ResultsOfOperationsAcquiree	<div style="font-size:10.0pt;font-family:Times New Roman;"> <p style="TEXT-INDENT: 0.5in; MARGIN: 0in 0in 0pt;"> </p> <p style="MARGIN: 0in 0in 0pt;"> </p> <table style="text-align:left;WIDTH: 96.66%; BORDER-COLLAPSE: collapse;" border="0" cellspacing="0" cellpadding="0" width="96%"> <tr style="padding:0;"> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 48.28%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="48%"> <p style="MARGIN: 0in 0in 0pt;"> </p></td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.58%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%"> <p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"> </p></td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 22.76%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="22%" colspan="2"> <p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"><b><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 8pt; FONT-WEIGHT: bold;" size="1">For the three months ended,</font></b></p></td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.58%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%"> <p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"> </p></td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 22.76%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="22%" colspan="2"> <p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"><b><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 8pt; FONT-WEIGHT: bold;" size="1">For the nine months ended,</font></b></p></td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1.04%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="1%"> <p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"> </p></td></tr> <tr style="padding:0;"> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 48.28%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="48%"> <p style="MARGIN: 0in 0in 0pt;"> </p></td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.58%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%"> <p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"> </p></td> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 22.76%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="22%" colspan="2"> <p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"><b><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 8pt; FONT-WEIGHT: bold;" size="1">September 30, 2013</font></b></p></td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.58%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%"> <p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"> </p></td> <td style="BORDER-BOTTOM: windowtext 1pt solid; BORDER-LEFT: medium none; PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 22.76%; PADDING-RIGHT: 0in; BORDER-TOP: medium none; BORDER-RIGHT: medium none; PADDING-TOP: 0in;" valign="bottom" width="22%" colspan="2"> <p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"><b><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 8pt; FONT-WEIGHT: bold;" size="1">September 30, 2013</font></b></p></td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1.04%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="1%"> <p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"> </p></td></tr> <tr style="padding:0;"> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 48.28%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="48%"> <p style="MARGIN: 0in 0in 0pt;"> </p></td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.58%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%"> <p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"> </p></td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 48.1%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="48%" colspan="5"> <p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"><b><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 8pt; FONT-WEIGHT: bold;" size="1">(in millions)</font></b></p></td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1.04%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="1%"> <p style="TEXT-ALIGN: center; MARGIN: 0in 0in 0pt;" align="center"> </p></td></tr> <tr style="padding:0;"> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 48.28%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="48%"> <p style="TEXT-INDENT: -10pt; MARGIN: 0in 0in 0pt 10pt;"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">Total revenues</font></p></td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.58%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="2%"> <p style="MARGIN: 0in 0in 0pt;"> </p></td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1.3%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="1%"> <p style="MARGIN: 0in 0in 0pt;"><b><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold;" size="2">$</font></b></p></td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 21.46%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="21%"> <p style="TEXT-ALIGN: right; MARGIN: 0in 0in 0pt;" align="right"><b><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold;" size="2">44.1</font></b></p></td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.58%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="2%"> <p style="MARGIN: 0in 0in 0pt;"> </p></td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1.3%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="1%"> <p style="MARGIN: 0in 0in 0pt;"><b><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold;" size="2">$</font></b></p></td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 21.46%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="21%"> <p style="TEXT-ALIGN: right; MARGIN: 0in 0in 0pt;" align="right"><b><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold;" size="2">120.8</font></b></p></td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1.04%; PADDING-RIGHT: 0in; BACKGROUND: #cceeff; PADDING-TOP: 0in;" bgcolor="#CCEEFF" valign="bottom" width="1%"> <p style="MARGIN: 0in 0in 0pt;"> </p></td></tr> <tr style="padding:0;"> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 48.28%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="48%"> <p style="TEXT-INDENT: -10pt; MARGIN: 0in 0in 0pt 10pt;"><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt;" size="2">Net income</font></p></td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.58%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%"> <p style="MARGIN: 0in 0in 0pt;"> </p></td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 22.76%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="22%" colspan="2"> <p style="TEXT-ALIGN: right; MARGIN: 0in 0in 0pt;" align="right"><b><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold;" size="2">17.3</font></b></p></td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 2.58%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="2%"> <p style="MARGIN: 0in 0in 0pt;"> </p></td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 22.76%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="22%" colspan="2"> <p style="TEXT-ALIGN: right; MARGIN: 0in 0in 0pt;" align="right"><b><font style="FONT-FAMILY: Times New Roman; FONT-SIZE: 10pt; FONT-WEIGHT: bold;" size="2">52.7</font></b></p></td> <td style="PADDING-BOTTOM: 0in; PADDING-LEFT: 0in; WIDTH: 1.04%; PADDING-RIGHT: 0in; PADDING-TOP: 0in;" valign="bottom" width="1%"> <p style="MARGIN: 0in 0in 0pt;"> </p></td></tr> <tr style="padding:0;"> <td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-TOP: medium none; BORDER-RIGHT: medium none;" width="349"></td> <td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-TOP: medium none; BORDER-RIGHT: medium none;" width="19"></td> <td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-TOP: medium none; BORDER-RIGHT: medium none;" width="9"></td> <td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-TOP: medium none; BORDER-RIGHT: medium none;" width="155"></td> <td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-TOP: medium none; BORDER-RIGHT: medium none;" width="19"></td> <td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-TOP: medium none; BORDER-RIGHT: medium none;" width="9"></td> <td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-TOP: medium none; BORDER-RIGHT: medium none;" width="155"></td> <td style="BORDER-BOTTOM: medium none; BORDER-LEFT: medium none; BORDER-TOP: medium none; BORDER-RIGHT: medium none;" width="8"></td></tr></table> <p style="MARGIN: 0in 0in 0pt;"> </p> </div>
CY2012Q3	us-gaap	Other Than Temporary Impairment Losses Investments Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities	43600000	USD
CY2012Q3	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities	34400000	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities	126400000	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities	95200000	USD
CY2013Q3	us-gaap	Other Than Temporary Impairment Losses Investments Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities	11900000	USD
CY2013Q3	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities	21200000	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities	81200000	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities	72400000	USD
CY2013Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	301500000	USD
CY2013Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	308000000	USD
CY2012Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	375500000	USD
CY2012Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	363400000	USD
CY2011Q4	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	434800000	USD
CY2012Q4	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	335200000	USD
CY2012Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment	2200000	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment	19100000	USD
CY2012Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	20900000	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	60800000	USD
CY2012Q3	pfg	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold Change In Status OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSoldChangeInStatus	32400000	USD
	pfg	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold Change In Status OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSoldChangeInStatus	146200000	USD
CY2012Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Cash Flows OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsCashFlows	2800000	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Cash Flows OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsCashFlows	5100000	USD
CY2013Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment	4900000	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment	11100000	USD
CY2013Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	18900000	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	54000000	USD
CY2013Q3	pfg	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold Change In Status OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSoldChangeInStatus	14600000	USD
	pfg	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold Change In Status OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSoldChangeInStatus	83100000	USD
CY2013Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Cash Flows OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsCashFlows	2700000	USD
	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Cash Flows OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsCashFlows	9200000	USD
CY2012Q4	pfg	Net Unrealized Gains Losses Debt Securities Available For Sale Securities NetUnrealizedGainsLossesDebtSecuritiesAvailableForSaleSecurities	3562500000	USD
CY2012Q4	pfg	Accumulated Other Comprehensive Income Loss Other Than Temporary Impairment Not Credit Loss Available For Sale Debt Securities AccumulatedOtherComprehensiveIncomeLossOtherThanTemporaryImpairmentNotCreditLossAvailableForSaleDebtSecurities	-302000000	USD
CY2012Q4	pfg	Net Unrealized Gains Losses Equity Securities Available For Sale NetUnrealizedGainsLossesEquitySecuritiesAvailableForSale	4100000	USD
CY2012Q4	pfg	Adjustments Assumed Changes Amortization Patterns AdjustmentsAssumedChangesAmortizationPatterns	-515200000	USD
CY2012Q4	pfg	Adjustments Assumed Changes Liability For Policyholder Benefits And Claims AdjustmentsAssumedChangesLiabilityForPolicyholderBenefitsAndClaims	-1198700000	USD
CY2012Q4	pfg	Net Unrealized Gains Losses Derivative Instruments NetUnrealizedGainsLossesDerivativeInstruments	90700000	USD
CY2012Q4	pfg	Net Unrealized Gains Losses Equity Method Subsidiaries And Noncontrolling Interest Adjustments NetUnrealizedGainsLossesEquityMethodSubsidiariesAndNoncontrollingInterestAdjustments	191300000	USD
CY2012Q4	pfg	Provision Deferred Income Tax Benefits Expense ProvisionDeferredIncomeTaxBenefitsExpense	-597000000	USD
CY2012Q4	pfg	Net Unrealized Gains Losses Available For Sale Securities And Derivative Instruments NetUnrealizedGainsLossesAvailableForSaleSecuritiesAndDerivativeInstruments	1235700000	USD
CY2013Q3	pfg	Net Unrealized Gains Losses Debt Securities Available For Sale Securities NetUnrealizedGainsLossesDebtSecuritiesAvailableForSaleSecurities	2155800000	USD
CY2013Q3	pfg	Accumulated Other Comprehensive Income Loss Other Than Temporary Impairment Not Credit Loss Available For Sale Debt Securities AccumulatedOtherComprehensiveIncomeLossOtherThanTemporaryImpairmentNotCreditLossAvailableForSaleDebtSecurities	-310800000	USD
CY2013Q3	pfg	Net Unrealized Gains Losses Equity Securities Available For Sale NetUnrealizedGainsLossesEquitySecuritiesAvailableForSale	-2800000	USD
CY2013Q3	pfg	Adjustments Assumed Changes Amortization Patterns AdjustmentsAssumedChangesAmortizationPatterns	-278700000	USD
CY2013Q3	pfg	Adjustments Assumed Changes Liability For Policyholder Benefits And Claims AdjustmentsAssumedChangesLiabilityForPolicyholderBenefitsAndClaims	-676900000	USD
CY2013Q3	pfg	Net Unrealized Gains Losses Derivative Instruments NetUnrealizedGainsLossesDerivativeInstruments	60600000	USD
CY2013Q3	pfg	Net Unrealized Gains Losses Equity Method Subsidiaries And Noncontrolling Interest Adjustments NetUnrealizedGainsLossesEquityMethodSubsidiariesAndNoncontrollingInterestAdjustments	93300000	USD
CY2013Q3	pfg	Provision Deferred Income Tax Benefits Expense ProvisionDeferredIncomeTaxBenefitsExpense	-345000000	USD
CY2013Q3	pfg	Net Unrealized Gains Losses Available For Sale Securities And Derivative Instruments NetUnrealizedGainsLossesAvailableForSaleSecuritiesAndDerivativeInstruments	695500000	USD
CY2012Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	11617100000	USD
CY2012Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	97400000	USD
CY2012Q4	us-gaap	Notes Receivable Net NotesReceivableNet	11519700000	USD
CY2013Q3	us-gaap	Notes Receivable Gross NotesReceivableGross	11956000000	USD
CY2013Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	87900000	USD
CY2013Q3	us-gaap	Notes Receivable Net NotesReceivableNet	11868100000	USD
CY2012Q4	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	80800000	USD
CY2012Q4	us-gaap	Financing Receivable Recorded Investment30 To59 Days Past Due FinancingReceivableRecordedInvestment30To59DaysPastDue	60800000	USD
CY2012Q4	us-gaap	Financing Receivable Recorded Investment60 To89 Days Past Due FinancingReceivableRecordedInvestment60To89DaysPastDue	21600000	USD
CY2012Q4	us-gaap	Financing Receivable Recorded Investment Equal To Greater Than90 Days Past Due FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue	23700000	USD
CY2012Q4	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	106100000	USD
CY2012Q4	us-gaap	Financing Receivable Recorded Investment1 To29 Days Past Due FinancingReceivableRecordedInvestment1To29DaysPastDue	11511000000	USD
CY2012Q4	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	8100000	USD
CY2013Q3	us-gaap	Financing Receivable Recorded Investment Nonaccrual Status FinancingReceivableRecordedInvestmentNonaccrualStatus	137400000	USD
CY2013Q3	us-gaap	Financing Receivable Recorded Investment30 To59 Days Past Due FinancingReceivableRecordedInvestment30To59DaysPastDue	34800000	USD
CY2013Q3	us-gaap	Financing Receivable Recorded Investment60 To89 Days Past Due FinancingReceivableRecordedInvestment60To89DaysPastDue	18000000	USD
CY2013Q3	us-gaap	Financing Receivable Recorded Investment Equal To Greater Than90 Days Past Due FinancingReceivableRecordedInvestmentEqualToGreaterThan90DaysPastDue	56400000	USD
CY2013Q3	us-gaap	Financing Receivable Recorded Investment Past Due FinancingReceivableRecordedInvestmentPastDue	109200000	USD
CY2013Q3	us-gaap	Financing Receivable Recorded Investment1 To29 Days Past Due FinancingReceivableRecordedInvestment1To29DaysPastDue	11846800000	USD
CY2013Q3	us-gaap	Financing Receivable Recorded Investment90 Days Past Due And Still Accruing FinancingReceivableRecordedInvestment90DaysPastDueAndStillAccruing	8200000	USD
CY2011Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	102100000	USD
CY2012Q3	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	95700000	USD
CY2012Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	86200000	USD
CY2013Q2	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	94900000	USD
CY2012Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-22900000	USD
CY2012Q3	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	14100000	USD
CY2012Q3	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	600000	USD
CY2012Q3	pfg	Financing Receivable Allowance For Credit Losses Translation Adjustment FinancingReceivableAllowanceForCreditLossesTranslationAdjustment	100000	USD
CY2012Q3	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	12600000	USD
CY2012Q3	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	83100000	USD
CY2012Q3	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	64000000	USD
CY2012Q3	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	11329600000	USD
CY2012Q3	us-gaap	Notes Receivable Gross NotesReceivableGross	11393600000	USD
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-46500000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	55600000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	2600000	USD
	pfg	Financing Receivable Allowance For Credit Losses Translation Adjustment FinancingReceivableAllowanceForCreditLossesTranslationAdjustment	100000	USD
CY2013Q3	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-2000000	USD
CY2013Q3	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	9900000	USD
CY2013Q3	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	900000	USD
CY2013Q3	us-gaap	Financing Receivable Allowance For Credit Losses Individually Evaluated For Impairment1 FinancingReceivableAllowanceForCreditLossesIndividuallyEvaluatedForImpairment1	18900000	USD
CY2013Q3	us-gaap	Financing Receivable Allowance For Credit Losses Collectively Evaluated For Impairment FinancingReceivableAllowanceForCreditLossesCollectivelyEvaluatedForImpairment	69000000	USD
CY2013Q3	us-gaap	Financing Receivable Individually Evaluated For Impairment FinancingReceivableIndividuallyEvaluatedForImpairment	65400000	USD
CY2013Q3	us-gaap	Financing Receivable Collectively Evaluated For Impairment FinancingReceivableCollectivelyEvaluatedForImpairment	11890600000	USD
	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-19300000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Write Offs FinancingReceivableAllowanceForCreditLossesWriteOffs	31900000	USD
	us-gaap	Financing Receivable Allowance For Credit Losses Recovery FinancingReceivableAllowanceForCreditLossesRecovery	3200000	USD
	pfg	Financing Receivable Allowance For Credit Losses Translation Adjustment FinancingReceivableAllowanceForCreditLossesTranslationAdjustment	-100000	USD
CY2012Q3	pfg	Financing Receivable Td Rs Number Of Contracts FinancingReceivableTDRsNumberOfContracts	136	item
CY2012Q3	pfg	Financing Receivable Td Rs Recorded Investment FinancingReceivableTDRsRecordedInvestment	14600000	USD
CY2012Q3	pfg	Financing Receivable Modifications Payment Default Number Of Loans FinancingReceivableModificationsPaymentDefaultNumberOfLoans	1	item
	pfg	Financing Receivable Td Rs Number Of Contracts FinancingReceivableTDRsNumberOfContracts	240	item
	pfg	Financing Receivable Td Rs Recorded Investment FinancingReceivableTDRsRecordedInvestment	32800000	USD
	pfg	Financing Receivable Modifications Payment Default Number Of Loans FinancingReceivableModificationsPaymentDefaultNumberOfLoans	4	item
	pfg	Financing Receivable Td Rs Number Of Contracts FinancingReceivableTDRsNumberOfContracts	65	item
	pfg	Financing Receivable Td Rs Recorded Investment FinancingReceivableTDRsRecordedInvestment	4600000	USD
	pfg	Financing Receivable Modifications Payment Default Number Of Loans FinancingReceivableModificationsPaymentDefaultNumberOfLoans	16	item
CY2013Q3	pfg	Financing Receivable Td Rs Number Of Contracts FinancingReceivableTDRsNumberOfContracts	12	item
CY2013Q3	pfg	Financing Receivable Td Rs Recorded Investment FinancingReceivableTDRsRecordedInvestment	800000	USD
CY2013Q3	pfg	Financing Receivable Modifications Payment Default Number Of Loans FinancingReceivableModificationsPaymentDefaultNumberOfLoans	1	item
	pfg	Financing Receivable Modifications Payment Default Recorded Investment FinancingReceivableModificationsPaymentDefaultRecordedInvestment	800000	USD
CY2013Q3	pfg	Financing Receivable Modifications Payment Default Recorded Investment FinancingReceivableModificationsPaymentDefaultRecordedInvestment	100000	USD
CY2013Q3	pfg	Fixed Maturities Pledged As Collateral FixedMaturitiesPledgedAsCollateral	1564100000	USD
CY2013Q3	us-gaap	Loans Pledged As Collateral LoansPledgedAsCollateral	2534000000	USD
CY2012Q4	pfg	Gross Amount Recognized Assets Subject To Netting GrossAmountRecognizedAssetsSubjectToNetting	1164500000	USD
CY2012Q4	pfg	Gross Amount Recognized Assets Subject To Netting Not Offset GrossAmountRecognizedAssetsSubjectToNettingNotOffset	779300000	USD
CY2012Q4	pfg	Collateral Received Assets Subject To Netting Not Offset CollateralReceivedAssetsSubjectToNettingNotOffset	373700000	USD
CY2012Q4	pfg	Net Amount Assets Subject To Netting NetAmountAssetsSubjectToNetting	11500000	USD
CY2013Q3	pfg	Gross Amount Recognized Assets Subject To Netting GrossAmountRecognizedAssetsSubjectToNetting	739100000	USD
CY2013Q3	pfg	Gross Amount Recognized Assets Subject To Netting Not Offset GrossAmountRecognizedAssetsSubjectToNettingNotOffset	593200000	USD
CY2013Q3	pfg	Collateral Received Assets Subject To Netting Not Offset CollateralReceivedAssetsSubjectToNettingNotOffset	145900000	USD
CY2013Q3	pfg	Annuities With Guaranteed Minimum Withdrawal Benefits Minimum Account Balance To Make Withdrawals AnnuitiesWithGuaranteedMinimumWithdrawalBenefitsMinimumAccountBalanceToMakeWithdrawals	0	USD
CY2012Q4	pfg	Derivative Collateral Pledged DerivativeCollateralPledged	296900000	USD
CY2012Q4	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	1205400000	USD
CY2012Q4	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	296900000	USD
CY2013Q3	pfg	Derivative Collateral Pledged DerivativeCollateralPledged	369700000	USD
CY2013Q3	us-gaap	Derivative Net Liability Position Aggregate Fair Value DerivativeNetLiabilityPositionAggregateFairValue	1038100000	USD
CY2013Q3	us-gaap	Collateral Already Posted Aggregate Fair Value CollateralAlreadyPostedAggregateFairValue	369700000	USD
CY2013Q3	us-gaap	Additional Collateral Aggregate Fair Value AdditionalCollateralAggregateFairValue	69200000	USD
CY2012Q4	pfg	Cash Collateral Received Associated With Derivatives CashCollateralReceivedAssociatedWithDerivatives	207800000	USD
CY2013Q3	pfg	Cash Collateral Received Associated With Derivatives CashCollateralReceivedAssociatedWithDerivatives	30000000	USD
CY2012Q4	invest	Derivative Notional Amount DerivativeNotionalAmount	34256400000	USD
CY2012Q4	pfg	Derivative Credit Exposure DerivativeCreditExposure	1086700000	USD
CY2013Q3	invest	Derivative Notional Amount DerivativeNotionalAmount	34938300000	USD
CY2013Q3	pfg	Derivative Credit Exposure DerivativeCreditExposure	739300000	USD
CY2012Q4	pfg	Derivative Collateral Received DerivativeCollateralReceived	248000000	USD
CY2012Q4	pfg	Derivative Net Credit Exposure DerivativeNetCreditExposure	838700000	USD
CY2013Q3	pfg	Derivative Collateral Received DerivativeCollateralReceived	112600000	USD
CY2013Q3	pfg	Derivative Net Credit Exposure DerivativeNetCreditExposure	626700000	USD
CY2012Q4	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	1016700000	USD
CY2012Q4	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	1528000000	USD
CY2012Q4	pfg	Derivative Fair Value Of Derivative Liability Investment Type Insurance Contracts DerivativeFairValueOfDerivativeLiabilityInvestmentTypeInsuranceContracts	170500000	USD
CY2013Q3	us-gaap	Derivative Fair Value Of Derivative Asset DerivativeFairValueOfDerivativeAsset	684600000	USD
CY2013Q3	us-gaap	Derivative Fair Value Of Derivative Liability DerivativeFairValueOfDerivativeLiability	1262300000	USD
CY2013Q3	pfg	Derivative Fair Value Of Derivative Liability Investment Type Insurance Contracts DerivativeFairValueOfDerivativeLiabilityInvestmentTypeInsuranceContracts	49300000	USD
CY2012Q4	pfg	Credit Derivative Purchased Credit Protection Alternate CreditDerivativePurchasedCreditProtectionAlternate	15000000	USD
CY2012Q4	pfg	Credit Derivative Purchased Fair Value CreditDerivativePurchasedFairValue	200000	USD
CY2013Q3	pfg	Credit Derivative Purchased Credit Protection Alternate CreditDerivativePurchasedCreditProtectionAlternate	34900000	USD
CY2013Q3	pfg	Credit Derivative Purchased Fair Value CreditDerivativePurchasedFairValue	-300000	USD
CY2012Q4	pfg	Credit Derivative Sold Notional CreditDerivativeSoldNotional	1018500000	USD
CY2012Q4	pfg	Credit Derivatives Sold Fair Value CreditDerivativesSoldFairValue	-88500000	USD
CY2012Q4	us-gaap	Credit Derivative Maximum Exposure Undiscounted CreditDerivativeMaximumExposureUndiscounted	1018500000	USD
CY2012	pfg	Credit Derivatives Sold Weighted Average Expected Life CreditDerivativesSoldWeightedAverageExpectedLife	P2Y10M24D
CY2013Q3	pfg	Credit Derivative Sold Notional CreditDerivativeSoldNotional	718900000	USD
CY2013Q3	pfg	Credit Derivatives Sold Fair Value CreditDerivativesSoldFairValue	-33400000	USD
CY2013Q3	us-gaap	Credit Derivative Maximum Exposure Undiscounted CreditDerivativeMaximumExposureUndiscounted	718900000	USD
	pfg	Credit Derivatives Sold Weighted Average Expected Life CreditDerivativesSoldWeightedAverageExpectedLife	P4Y2M12D
CY2012Q4	pfg	Hybrid Instrument Amortized Cost HybridInstrumentAmortizedCost	111400000	USD
CY2012Q4	us-gaap	Hybrid Instruments At Fair Value Net HybridInstrumentsAtFairValueNet	109200000	USD
CY2012	pfg	Hybrid Instruments Weighted Average Expected Life HybridInstrumentsWeightedAverageExpectedLife	P3Y9M18D
CY2013Q3	pfg	Hybrid Instrument Amortized Cost HybridInstrumentAmortizedCost	77500000	USD
CY2013Q3	us-gaap	Hybrid Instruments At Fair Value Net HybridInstrumentsAtFairValueNet	76100000	USD
	pfg	Hybrid Instruments Weighted Average Expected Life HybridInstrumentsWeightedAverageExpectedLife	P4Y
CY2013Q3	pfg	Future Potential Payments FuturePotentialPayments	0	USD
CY2012Q3	us-gaap	Change In Unrealized Gain Loss On Fair Value Hedging Instruments ChangeInUnrealizedGainLossOnFairValueHedgingInstruments	21400000	USD
CY2012Q3	us-gaap	Change In Unrealized Gain Loss On Hedged Item In Fair Value Hedge ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge	-23900000	USD
	us-gaap	Change In Unrealized Gain Loss On Fair Value Hedging Instruments ChangeInUnrealizedGainLossOnFairValueHedgingInstruments	22600000	USD
	us-gaap	Change In Unrealized Gain Loss On Hedged Item In Fair Value Hedge ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge	-21600000	USD
CY2013Q3	us-gaap	Change In Unrealized Gain Loss On Fair Value Hedging Instruments ChangeInUnrealizedGainLossOnFairValueHedgingInstruments	49700000	USD
CY2013Q3	us-gaap	Change In Unrealized Gain Loss On Hedged Item In Fair Value Hedge ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge	-49300000	USD
	us-gaap	Change In Unrealized Gain Loss On Fair Value Hedging Instruments ChangeInUnrealizedGainLossOnFairValueHedgingInstruments	73200000	USD
	pfg	Deferred Acquisition Cost And Other Actuarial Balances Amortization Expense DeferredAcquisitionCostAndOtherActuarialBalancesAmortizationExpense	-44800000	USD
	us-gaap	Change In Unrealized Gain Loss On Hedged Item In Fair Value Hedge ChangeInUnrealizedGainLossOnHedgedItemInFairValueHedge	-68200000	USD
CY2012Q3	pfg	Deferred Acquisition Cost And Other Actuarial Balances Amortization Expense DeferredAcquisitionCostAndOtherActuarialBalancesAmortizationExpense	-30500000	USD
	pfg	Deferred Acquisition Cost And Other Actuarial Balances Amortization Expense DeferredAcquisitionCostAndOtherActuarialBalancesAmortizationExpense	-34700000	USD
CY2013Q3	pfg	Capital Gains Losses Distributed CapitalGainsLossesDistributed	200000	USD
	pfg	Capital Gains Losses Distributed CapitalGainsLossesDistributed	11100000	USD
CY2012Q4	us-gaap	Assets Assets	161830200000	USD
CY2013Q3	us-gaap	Assets Assets	201687400000	USD
CY2012Q3	pfg	Segment Reporting Information Net Realized Capital Gains Losses SegmentReportingInformationNetRealizedCapitalGainsLosses	64900000	USD
CY2012Q3	pfg	Exited Group Medical Insurance Business Revenues ExitedGroupMedicalInsuranceBusinessRevenues	1200000	USD
CY2012Q3	pfg	Segment Reporting Information Net Realized Capital Gains Losses Net Of Tax And Adjustments SegmentReportingInformationNetRealizedCapitalGainsLossesNetOfTaxAndAdjustments	88800000	USD
CY2012Q3	pfg	Segment Reporting Information Other Adjustments After Tax SegmentReportingInformationOtherAdjustmentsAfterTax	-43900000	USD
CY2012Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	187200000	USD
	pfg	Segment Reporting Information Net Realized Capital Gains Losses SegmentReportingInformationNetRealizedCapitalGainsLosses	12800000	USD
	pfg	Exited Group Medical Insurance Business Revenues ExitedGroupMedicalInsuranceBusinessRevenues	24100000	USD
	pfg	Segment Reporting Information Net Realized Capital Gains Losses Net Of Tax And Adjustments SegmentReportingInformationNetRealizedCapitalGainsLossesNetOfTaxAndAdjustments	39600000	USD
	pfg	Segment Reporting Information Other Adjustments After Tax SegmentReportingInformationOtherAdjustmentsAfterTax	-49400000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	558700000	USD
CY2013Q3	us-gaap	Segment Reporting Information Revenue SegmentReportingInformationRevenue	2315800000	USD
CY2013Q3	pfg	Segment Reporting Information Net Realized Capital Gains Losses SegmentReportingInformationNetRealizedCapitalGainsLosses	-76700000	USD
CY2013Q3	pfg	Exited Group Medical Insurance Business Revenues ExitedGroupMedicalInsuranceBusinessRevenues	500000	USD
CY2013Q3	pfg	Operating Earnings OperatingEarnings	269200000	USD
CY2013Q3	pfg	Segment Reporting Information Net Realized Capital Gains Losses Net Of Tax And Adjustments SegmentReportingInformationNetRealizedCapitalGainsLossesNetOfTaxAndAdjustments	-22800000	USD
CY2013Q3	pfg	Segment Reporting Information Other Adjustments After Tax SegmentReportingInformationOtherAdjustmentsAfterTax	-700000	USD
CY2013Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	245700000	USD
	us-gaap	Segment Reporting Information Revenue SegmentReportingInformationRevenue	6865800000	USD
	pfg	Segment Reporting Information Net Realized Capital Gains Losses SegmentReportingInformationNetRealizedCapitalGainsLosses	-253400000	USD
	pfg	Exited Group Medical Insurance Business Revenues ExitedGroupMedicalInsuranceBusinessRevenues	4500000	USD
CY2012Q3	pfg	Front End Fee Revenues Recognition FrontEndFeeRevenuesRecognition	-100000	USD
CY2013Q3	pfg	Deferred Acquisition Cost And Other Actuarial Balances Amortization Expense DeferredAcquisitionCostAndOtherActuarialBalancesAmortizationExpense	-26700000	USD
	pfg	Operating Earnings OperatingEarnings	773900000	USD
	pfg	Segment Reporting Information Net Realized Capital Gains Losses Net Of Tax And Adjustments SegmentReportingInformationNetRealizedCapitalGainsLossesNetOfTaxAndAdjustments	-126800000	USD
	pfg	Segment Reporting Information Other Adjustments After Tax SegmentReportingInformationOtherAdjustmentsAfterTax	-800000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	646300000	USD
	us-gaap	Revenues Revenues	6919200000	USD
CY2012Q3	us-gaap	Revenues Revenues	2704700000	USD
CY2013Q3	us-gaap	Revenues Revenues	2239600000	USD
	us-gaap	Revenues Revenues	6616900000	USD
CY2012Q3	pfg	Other Adjustments Charitable Contribution OtherAdjustmentsCharitableContribution	-39800000	USD
	pfg	Other Adjustments Charitable Contribution OtherAdjustmentsCharitableContribution	-39800000	USD
	pfg	Group Medical Insurance Business Not Discontinued Operation GroupMedicalInsuranceBusinessNotDiscontinuedOperation	-9600000	USD
CY2013Q3	pfg	Derivative And Hedging Related Adjustments DerivativeAndHedgingRelatedAdjustments	25600000	USD
	pfg	Derivative And Hedging Related Adjustments DerivativeAndHedgingRelatedAdjustments	70700000	USD
CY2012Q3	pfg	Derivative And Hedging Related Adjustments DerivativeAndHedgingRelatedAdjustments	22700000	USD
	pfg	Derivative And Hedging Related Adjustments DerivativeAndHedgingRelatedAdjustments	68400000	USD
CY2013Q3	pfg	Front End Fee Revenues Recognition FrontEndFeeRevenuesRecognition	-200000	USD
	pfg	Front End Fee Revenues Recognition FrontEndFeeRevenuesRecognition	-800000	USD
CY2012Q3	pfg	Capital Gains Losses Distributed CapitalGainsLossesDistributed	6800000	USD
	pfg	Capital Gains Losses Distributed CapitalGainsLossesDistributed	8700000	USD
CY2013Q3	pfg	Market Value Adjustments Embedded Derivatives MarketValueAdjustmentsEmbeddedDerivatives	18700000	USD
	pfg	Market Value Adjustments Embedded Derivatives MarketValueAdjustmentsEmbeddedDerivatives	18400000	USD
	pfg	Market Value Adjustments Embedded Derivatives MarketValueAdjustmentsEmbeddedDerivatives	-1400000	USD
	pfg	Net Realized Capital Gains Losses Exited Group Medical Insurance Business NetRealizedCapitalGainsLossesExitedGroupMedicalInsuranceBusiness	200000	USD
CY2013Q3	pfg	Noncontrolling Interest Capital Gains Losses NoncontrollingInterestCapitalGainsLosses	200000	USD
	pfg	Noncontrolling Interest Capital Gains Losses NoncontrollingInterestCapitalGainsLosses	200000	USD
	pfg	Noncontrolling Interest Capital Gains Losses NoncontrollingInterestCapitalGainsLosses	8200000	USD
CY2013Q3	pfg	Net Realized Capital Gains Losses Income Taxes NetRealizedCapitalGainsLossesIncomeTaxes	-8900000	USD
	pfg	Net Realized Capital Gains Losses Income Taxes NetRealizedCapitalGainsLossesIncomeTaxes	-74700000	USD
CY2012Q3	pfg	Net Realized Capital Gains Losses Income Taxes NetRealizedCapitalGainsLossesIncomeTaxes	-200000	USD
	pfg	Net Realized Capital Gains Losses Income Taxes NetRealizedCapitalGainsLossesIncomeTaxes	-10200000	USD
CY2013Q3	us-gaap	Profit Loss ProfitLoss	259100000	USD
	us-gaap	Profit Loss ProfitLoss	685700000	USD
CY2012Q3	us-gaap	Profit Loss ProfitLoss	198800000	USD
	us-gaap	Profit Loss ProfitLoss	598700000	USD
CY2013Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	5200000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	14700000	USD
CY2012Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	3400000	USD
	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	15300000	USD
CY2013Q3	us-gaap	Dividends Preferred Stock DividendsPreferredStock	8200000	USD
	us-gaap	Dividends Preferred Stock DividendsPreferredStock	24700000	USD
CY2012Q3	us-gaap	Dividends Preferred Stock DividendsPreferredStock	8200000	USD
	us-gaap	Dividends Preferred Stock DividendsPreferredStock	24700000	USD
CY2013Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	294900000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	294400000	shares
CY2012Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	294700000	shares
	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	298600000	shares
CY2013Q3	pfg	Incremental Common Shares Attributable To Stock Options IncrementalCommonSharesAttributableToStockOptions	1700000	shares
	pfg	Incremental Common Shares Attributable To Stock Options IncrementalCommonSharesAttributableToStockOptions	1400000	shares
CY2012Q3	pfg	Incremental Common Shares Attributable To Stock Options IncrementalCommonSharesAttributableToStockOptions	1000000	shares
	pfg	Incremental Common Shares Attributable To Stock Options IncrementalCommonSharesAttributableToStockOptions	1000000	shares
CY2013Q3	pfg	Incremental Common Shares Attributable To Restricted Stock Units IncrementalCommonSharesAttributableToRestrictedStockUnits	1700000	shares
	pfg	Incremental Common Shares Attributable To Restricted Stock Units IncrementalCommonSharesAttributableToRestrictedStockUnits	1600000	shares
CY2012Q3	pfg	Incremental Common Shares Attributable To Restricted Stock Units IncrementalCommonSharesAttributableToRestrictedStockUnits	1500000	shares
	pfg	Incremental Common Shares Attributable To Restricted Stock Units IncrementalCommonSharesAttributableToRestrictedStockUnits	1400000	shares
CY2013Q3	pfg	Incremental Common Shares Attributable To Performance Share Awards IncrementalCommonSharesAttributableToPerformanceShareAwards	300000	shares
	pfg	Incremental Common Shares Attributable To Performance Share Awards IncrementalCommonSharesAttributableToPerformanceShareAwards	300000	shares
CY2012Q3	pfg	Incremental Common Shares Attributable To Performance Share Awards IncrementalCommonSharesAttributableToPerformanceShareAwards	300000	shares
	pfg	Incremental Common Shares Attributable To Performance Share Awards IncrementalCommonSharesAttributableToPerformanceShareAwards	400000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	297700000	shares
CY2012Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	297500000	shares
	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	301400000	shares
CY2013Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.83
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.20
CY2012Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.64
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.87
CY2013Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.82
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.17
CY2012Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.63
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.85
CY2012Q4	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	50939300000	USD
CY2012Q4	us-gaap	Trading Securities Debt TradingSecuritiesDebt	626700000	USD
CY2012Q4	us-gaap	Available For Sale Securities Equity Securities AvailableForSaleSecuritiesEquitySecurities	136500000	USD
CY2012Q4	us-gaap	Trading Securities Equity TradingSecuritiesEquity	252800000	USD
CY2012Q4	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	11519700000	USD
CY2012Q4	us-gaap	Real Estate Investments RealEstateInvestments	1180300000	USD
CY2012Q4	us-gaap	Equity Method Investments EquityMethodInvestments	869000000	USD
CY2012Q4	pfg	Other Investments Other OtherInvestmentsOther	2422100000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	4177200000	USD
CY2012Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	584400000	USD
CY2012Q4	us-gaap	Premiums And Other Receivables Net PremiumsAndOtherReceivablesNet	1084400000	USD
CY2012Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	2590000000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	464200000	USD
CY2012Q4	us-gaap	Goodwill Goodwill	543400000	USD
CY2012Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	914700000	USD
CY2012Q4	us-gaap	Separate Account Assets SeparateAccountAssets	81653800000	USD
CY2012Q4	us-gaap	Other Assets OtherAssets	1006800000	USD
CY2012Q4	pfg	Contractholder Funds ContractholderFunds	37786500000	USD
CY2012Q4	us-gaap	Liability For Future Policy Benefits And Unpaid Claims And Claims Adjustment Expense LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense	22436200000	USD
CY2012Q4	us-gaap	Other Policyholder Funds OtherPolicyholderFunds	716400000	USD
CY2012Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	40800000	USD
CY2012Q4	us-gaap	Long Term Debt LongTermDebt	2671300000	USD
CY2012Q4	us-gaap	Accrued Income Taxes AccruedIncomeTaxes	15300000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	600000000	USD
CY2012Q4	us-gaap	Separate Accounts Liability SeparateAccountsLiability	81653800000	USD
CY2012Q4	us-gaap	Other Liabilities OtherLiabilities	6146100000	USD
CY2012Q4	us-gaap	Liabilities Liabilities	152066400000	USD
CY2012Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	60400000	USD
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	4500000	USD
CY2012Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	9730900000	USD
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	4862000000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	640300000	USD
CY2012Q4	us-gaap	Treasury Stock Value TreasuryStockValue	5554400000	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	9683400000	USD
CY2012Q4	us-gaap	Minority Interest MinorityInterest	20000000	USD
CY2012Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	9703400000	USD
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	161830200000	USD
CY2013Q3	us-gaap	Trading Securities Debt TradingSecuritiesDebt	572900000	USD
CY2013Q3	us-gaap	Available For Sale Securities Equity Securities AvailableForSaleSecuritiesEquitySecurities	114000000	USD
CY2013Q3	us-gaap	Trading Securities Equity TradingSecuritiesEquity	666200000	USD
CY2013Q3	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	11868100000	USD
CY2013Q3	us-gaap	Real Estate Investments RealEstateInvestments	1278600000	USD
CY2013Q3	us-gaap	Equity Method Investments EquityMethodInvestments	900400000	USD
CY2013Q3	pfg	Other Investments Other OtherInvestmentsOther	2093600000	USD
CY2013Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	1707100000	USD
CY2013Q3	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	571200000	USD
CY2013Q3	us-gaap	Premiums And Other Receivables Net PremiumsAndOtherReceivablesNet	1160700000	USD
CY2013Q3	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	3007600000	USD
CY2013Q3	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	479100000	USD
CY2013Q3	us-gaap	Goodwill Goodwill	1127500000	USD
CY2013Q3	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	1497400000	USD
CY2013Q3	us-gaap	Separate Account Assets SeparateAccountAssets	123800500000	USD
CY2013Q3	us-gaap	Other Assets OtherAssets	1068000000	USD
CY2013Q3	pfg	Contractholder Funds ContractholderFunds	36402700000	USD
CY2013Q3	us-gaap	Liability For Future Policy Benefits And Unpaid Claims And Claims Adjustment Expense LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense	22324200000	USD
CY2013Q3	us-gaap	Other Policyholder Funds OtherPolicyholderFunds	753600000	USD
CY2013Q3	us-gaap	Short Term Borrowings ShortTermBorrowings	175500000	USD
CY2013Q3	us-gaap	Long Term Debt LongTermDebt	2593300000	USD
CY2013Q3	us-gaap	Accrued Income Taxes AccruedIncomeTaxes	7900000	USD
CY2013Q3	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	634600000	USD
CY2013Q3	us-gaap	Separate Accounts Liability SeparateAccountsLiability	123800500000	USD
CY2013Q3	us-gaap	Other Liabilities OtherLiabilities	5387200000	USD
CY2013Q3	us-gaap	Liabilities Liabilities	192079500000	USD
CY2013Q3	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	234500000	USD
CY2013Q3	us-gaap	Common Stock Value CommonStockValue	4600000	USD
CY2013Q3	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	9749300000	USD
CY2013Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	5249900000	USD
CY2013Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-17700000	USD
CY2013Q3	us-gaap	Treasury Stock Value TreasuryStockValue	5707800000	USD
CY2013Q3	us-gaap	Stockholders Equity StockholdersEquity	9278400000	USD
CY2013Q3	us-gaap	Minority Interest MinorityInterest	95000000	USD
CY2013Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	9373400000	USD
CY2013Q3	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	201687400000	USD
	us-gaap	Premiums Earned Net PremiumsEarnedNet	2519300000	USD
	us-gaap	Fees And Commissions FeesAndCommissions	1909100000	USD
	us-gaap	Net Investment Income NetInvestmentIncome	2409600000	USD
	pfg	Net Gain Loss Excluding Available For Sale Impairments NetGainLossExcludingAvailableForSaleImpairments	176400000	USD
	pfg	Net Impairment Losses On Available For Sale Securities NetImpairmentLossesOnAvailableForSaleSecurities	95200000	USD
	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	3969500000	USD
	us-gaap	Policyholder Dividends PolicyholderDividends	149500000	USD
	pfg	Operating Expenses Including Deferred Acquisition Costs Capitalization And Amortization OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization	2101100000	USD
	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	6220100000	USD
	pfg	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	699100000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	100400000	USD
	us-gaap	Net Income Loss NetIncomeLoss	583400000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	1216800000	USD
	us-gaap	Premiums Earned Net PremiumsEarnedNet	2134900000	USD
	us-gaap	Fees And Commissions FeesAndCommissions	2340400000	USD
	us-gaap	Net Investment Income NetInvestmentIncome	2323500000	USD
	pfg	Net Gain Loss Excluding Available For Sale Impairments NetGainLossExcludingAvailableForSaleImpairments	-109500000	USD
	pfg	Net Impairment Losses On Available For Sale Securities NetImpairmentLossesOnAvailableForSaleSecurities	72400000	USD
	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	3286400000	USD
	us-gaap	Policyholder Dividends PolicyholderDividends	144300000	USD
	pfg	Operating Expenses Including Deferred Acquisition Costs Capitalization And Amortization OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization	2372100000	USD
	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	5802800000	USD
	pfg	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	814100000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	128400000	USD
	us-gaap	Net Income Loss NetIncomeLoss	671000000	USD
	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	17400000	USD
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	6467500000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	946500000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	4702700000	USD
	us-gaap	Payments To Acquire Mortgage Notes Receivable PaymentsToAcquireMortgageNotesReceivable	1811800000	USD
	us-gaap	Proceeds From Sale And Collection Of Mortgage Notes Receivable ProceedsFromSaleAndCollectionOfMortgageNotesReceivable	1166700000	USD
	us-gaap	Payments To Acquire Real Estate Held For Investment PaymentsToAcquireRealEstateHeldForInvestment	114800000	USD
	pfg	Payments To Acquire Property Plant And Equipment Net PaymentsToAcquirePropertyPlantAndEquipmentNet	35600000	USD
	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	62500000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	42900000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-1719200000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	24700000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	272700000	USD
	us-gaap	Proceeds From Derivative Instrument Financing Activities ProceedsFromDerivativeInstrumentFinancingActivities	51600000	USD
	us-gaap	Payments For Derivative Instrument Financing Activities PaymentsForDerivativeInstrumentFinancingActivities	38300000	USD
	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	9800000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	169600000	USD
	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	16500000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	602900000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	2100000	USD
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	-81000000	USD
	us-gaap	Additions To Contract Holders Funds AdditionsToContractHoldersFunds	4798700000	USD
	us-gaap	Withdrawal From Contract Holders Funds WithdrawalFromContractHoldersFunds	6126000000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	14900000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-5800000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-1209400000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-554900000	USD
CY2012Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2279000000	USD
	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	1397900000	USD
	us-gaap	Payments To Acquire Available For Sale Securities PaymentsToAcquireAvailableForSaleSecurities	7012300000	USD
	us-gaap	Proceeds From Sale Of Available For Sale Securities ProceedsFromSaleOfAvailableForSaleSecurities	1626700000	USD
	us-gaap	Proceeds From Maturities Prepayments And Calls Of Available For Sale Securities ProceedsFromMaturitiesPrepaymentsAndCallsOfAvailableForSaleSecurities	5783200000	USD
	us-gaap	Payments To Acquire Mortgage Notes Receivable PaymentsToAcquireMortgageNotesReceivable	2020000000	USD
	us-gaap	Proceeds From Sale And Collection Of Mortgage Notes Receivable ProceedsFromSaleAndCollectionOfMortgageNotesReceivable	1570800000	USD
	us-gaap	Payments To Acquire Real Estate Held For Investment PaymentsToAcquireRealEstateHeldForInvestment	59000000	USD
	pfg	Payments To Acquire Property Plant And Equipment Net PaymentsToAcquirePropertyPlantAndEquipmentNet	22700000	USD
	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	1268300000	USD
	us-gaap	Payments For Proceeds From Other Investing Activities PaymentsForProceedsFromOtherInvestingActivities	31200000	USD
	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-1432800000	USD
	us-gaap	Proceeds From Issuance Of Common Stock ProceedsFromIssuanceOfCommonStock	80200000	USD
	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	153400000	USD
	us-gaap	Proceeds From Derivative Instrument Financing Activities ProceedsFromDerivativeInstrumentFinancingActivities	46700000	USD
	us-gaap	Payments For Derivative Instrument Financing Activities PaymentsForDerivativeInstrumentFinancingActivities	36900000	USD
	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	8600000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	211700000	USD
	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	24700000	USD
	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	24100000	USD
	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	212200000	USD
	us-gaap	Proceeds From Repayments Of Short Term Debt ProceedsFromRepaymentsOfShortTermDebt	131600000	USD
	us-gaap	Additions To Contract Holders Funds AdditionsToContractHoldersFunds	5270200000	USD
	us-gaap	Withdrawal From Contract Holders Funds WithdrawalFromContractHoldersFunds	7055600000	USD
	us-gaap	Increase Decrease In Deposits IncreaseDecreaseInDeposits	-276200000	USD
	us-gaap	Proceeds From Payments For Other Financing Activities ProceedsFromPaymentsForOtherFinancingActivities	-6300000	USD
	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-2435200000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-2470100000	USD
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2833900000	USD
	dei	Entity Registrant Name EntityRegistrantName	PRINCIPAL FINANCIAL GROUP INC
	dei	Entity Central Index Key EntityCentralIndexKey	0001126328
	dei	Document Type DocumentType	10-Q
	dei	Document Period End Date DocumentPeriodEndDate	2013-09-30
	dei	Amendment Flag AmendmentFlag	false
	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
	dei	Entity Filer Category EntityFilerCategory	Large Accelerated Filer
CY2013Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	294370290	shares
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2013
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
CY2012Q4	pfg	Other Investments As Defined OtherInvestmentsAsDefined	3291100000	USD
CY2012Q4	us-gaap	Investments Investments	68811300000	USD
CY2013Q3	us-gaap	Investments Investments	67268300000	USD
CY2013Q3	pfg	Other Investments Fair Value Option OtherInvestmentsFairValueOption	140500000	USD
CY2012Q4	pfg	Other Investments Fair Value Option OtherInvestmentsFairValueOption	113900000	USD
CY2012Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2013Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	2500000000	shares
CY2013Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	2500000000	shares
CY2012Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	453500000	shares
CY2013Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	458000000	shares
CY2012Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	293800000	shares
CY2013Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	293900000	shares
CY2012Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	159700000	shares
	pfg	Minority Interest Increase From Contributions From Noncontrolling Interest MinorityInterestIncreaseFromContributionsFromNoncontrollingInterest	115700000	USD
	pfg	Profit Loss Excluding Redeemable Noncontrolling Interest ProfitLossExcludingRedeemableNoncontrollingInterest	676700000	USD
	pfg	Other Comprehensive Income Loss Net Of Tax Excluding Redeemable Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxExcludingRedeemableNoncontrollingInterest	-665000000	USD
CY2013Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	164100000	shares
CY2012Q3	us-gaap	Net Income Loss NetIncomeLoss	195400000	USD
CY2012Q3	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	1647000000	USD
CY2012Q3	us-gaap	Policyholder Dividends PolicyholderDividends	49700000	USD
CY2012Q3	pfg	Operating Expenses Including Deferred Acquisition Costs Capitalization And Amortization OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization	816400000	USD
CY2012Q3	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	2513100000	USD
	us-gaap	Increase Decrease In Accrued Investment Income Receivable IncreaseDecreaseInAccruedInvestmentIncomeReceivable	-800000	USD
	us-gaap	Proceeds From Payments For Trading Securities ProceedsFromPaymentsForTradingSecurities	135300000	USD
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	-65700000	USD
	us-gaap	Increase Decrease In Insurance Liabilities IncreaseDecreaseInInsuranceLiabilities	1578800000	USD
CY2012Q3	pfg	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	191600000	USD
CY2012Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-7200000	USD
CY2012Q3	us-gaap	Premiums Earned Net PremiumsEarnedNet	1158200000	USD
CY2012Q3	us-gaap	Fees And Commissions FeesAndCommissions	675000000	USD
CY2012Q3	us-gaap	Net Investment Income NetInvestmentIncome	783800000	USD
CY2012Q3	pfg	Net Gain Loss Excluding Available For Sale Impairments NetGainLossExcludingAvailableForSaleImpairments	122100000	USD
CY2013Q3	us-gaap	Net Income Loss NetIncomeLoss	253900000	USD
CY2013Q3	pfg	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	320300000	USD
CY2013Q3	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1919300000	USD
CY2012Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	526700000	USD
CY2012Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	4200000	USD
CY2012Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	522500000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	16300000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1200500000	USD
CY2013Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	236700000	USD
CY2013Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	241100000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	13000000	USD
	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	27600000	USD
	us-gaap	Deferred Policy Acquisition Costs Additions DeferredPolicyAcquisitionCostsAdditions	-298900000	USD
	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	-29600000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	99100000	USD
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	48200000	USD
	us-gaap	Proceeds From Sale And Collection Of Loans Heldforsale ProceedsFromSaleAndCollectionOfLoansHeldforsale	90100000	USD
	us-gaap	Payments To Acquire Held For Sale Real Estate PaymentsToAcquireHeldForSaleRealEstate	25500000	USD
	us-gaap	Proceeds From Sale Of Wholly Owned Real Estate And Real Estate Acquired In Settlement Of Loans ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans	4100000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	50200000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-206700000	USD
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	1775000000	USD
	pfg	Other Comprehensive Income Loss Attributable To Redeemable Noncontrolling Interest OtherComprehensiveIncomeLossAttributableToRedeemableNoncontrollingInterest	900000	USD
CY2011Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	9306200000	USD
CY2012Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	9779100000	USD
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	24700000	USD
	pfg	Share Based Compensation Including Tax Effect ShareBasedCompensationIncludingTaxEffect	50100000	USD
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	272700000	USD
	us-gaap	Dividends Common Stock DividendsCommonStock	169600000	USD
	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	8100000	USD
	pfg	Minority Interest Increase From Contributions From Noncontrolling Interest MinorityInterestIncreaseFromContributionsFromNoncontrollingInterest	12100000	USD
	us-gaap	Noncontrolling Interest Decrease From Deconsolidation NoncontrollingInterestDecreaseFromDeconsolidation	353200000	USD
	pfg	Other Comprehensive Income Loss Net Of Tax Excluding Redeemable Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxExcludingRedeemableNoncontrollingInterest	617200000	USD
	pfg	Profit Loss Excluding Redeemable Noncontrolling Interest ProfitLossExcludingRedeemableNoncontrollingInterest	597100000	USD
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	80200000	USD
	pfg	Share Based Compensation Including Tax Effect ShareBasedCompensationIncludingTaxEffect	51300000	USD
	us-gaap	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	153400000	USD
	us-gaap	Dividends Common Stock DividendsCommonStock	211700000	USD
	us-gaap	Net Income Loss Attributable To Redeemable Noncontrolling Interest NetIncomeLossAttributableToRedeemableNoncontrollingInterest	9000000	USD
	pfg	Distributions To Redeemable Noncontrolling Interest DistributionsToRedeemableNoncontrollingInterest	9900000	USD
	pfg	Foreign Currency Transaction Attributable To Redeemable Noncontrolling Interest ForeignCurrencyTransactionAttributableToRedeemableNoncontrollingInterest	-3300000	USD
	pfg	Other Comprehensive Income Loss Attributable To Redeemable Noncontrolling Interest OtherComprehensiveIncomeLossAttributableToRedeemableNoncontrollingInterest	-3300000	USD
	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	136000000	USD
	us-gaap	Deferred Policy Acquisition Costs Additions DeferredPolicyAcquisitionCostsAdditions	-338500000	USD
	us-gaap	Increase Decrease In Accrued Investment Income Receivable IncreaseDecreaseInAccruedInvestmentIncomeReceivable	-13200000	USD
	us-gaap	Proceeds From Payments For Trading Securities ProceedsFromPaymentsForTradingSecurities	-40500000	USD
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	43800000	USD
	us-gaap	Increase Decrease In Insurance Liabilities IncreaseDecreaseInInsuranceLiabilities	993000000	USD
	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	175600000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	114500000	USD
	us-gaap	Proceeds From Sale And Collection Of Loans Heldforsale ProceedsFromSaleAndCollectionOfLoansHeldforsale	200000	USD
	us-gaap	Payments To Acquire Held For Sale Real Estate PaymentsToAcquireHeldForSaleRealEstate	81500000	USD
	us-gaap	Proceeds From Sale Of Wholly Owned Real Estate And Real Estate Acquired In Settlement Of Loans ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans	12200000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	51700000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	461800000	USD
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	712200000	USD
CY2012Q3	us-gaap	Segment Reporting Information Revenue SegmentReportingInformationRevenue	2638600000	USD
	us-gaap	Segment Reporting Information Revenue SegmentReportingInformationRevenue	6882300000	USD
CY2012Q3	pfg	Operating Earnings OperatingEarnings	142300000	USD
	pfg	Operating Earnings OperatingEarnings	568500000	USD
CY2013Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	4400000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	4400000	USD
	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	51400000	USD
	pfg	Minority Interest Increase From Sale Of Subsidiary Shares To Noncontrolling Interest MinorityInterestIncreaseFromSaleOfSubsidiarySharesToNoncontrollingInterest	31800000	USD
	us-gaap	Payments To Minority Shareholders PaymentsToMinorityShareholders	51700000	USD
	us-gaap	Proceeds From Minority Shareholders ProceedsFromMinorityShareholders	32100000	USD
CY2013Q3	pfg	Other Investments As Defined OtherInvestmentsAsDefined	2994000000	USD
CY2013Q3	us-gaap	Premiums Earned Net PremiumsEarnedNet	703000000	USD
CY2013Q3	us-gaap	Fees And Commissions FeesAndCommissions	803000000	USD
CY2013Q3	us-gaap	Net Investment Income NetInvestmentIncome	784500000	USD
CY2013Q3	pfg	Net Gain Loss Excluding Available For Sale Impairments NetGainLossExcludingAvailableForSaleImpairments	-29700000	USD
CY2013Q3	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	1096200000	USD
CY2013Q3	us-gaap	Policyholder Dividends PolicyholderDividends	48500000	USD
CY2013Q3	pfg	Operating Expenses Including Deferred Acquisition Costs Capitalization And Amortization OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization	774600000	USD
CY2013Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	61200000	USD
	pfg	Adjustments To Redemption Amount Of Redeemable Noncontrolling Interest AdjustmentsToRedemptionAmountOfRedeemableNoncontrollingInterest	-179500000	USD
	pfg	Reclassification From Stockholders Equity ReclassificationFromStockholdersEquity	173900000	USD
	pfg	Contributions To Redeemable Noncontrolling Interest ContributionsToRedeemableNoncontrollingInterest	1200000	USD
	pfg	Purchase Of Subsidiary Shares From Redeemable Noncontrolling Interest PurchaseOfSubsidiarySharesFromRedeemableNoncontrollingInterest	2400000	USD
	us-gaap	Minority Interest Change In Redemption Value MinorityInterestChangeInRedemptionValue	5600000	USD
	pfg	Redeemable Noncontrolling Interest Assumed RedeemableNoncontrollingInterestAssumed	37600000	USD
	pfg	Group Medical Insurance Business Not Discontinued Operation GroupMedicalInsuranceBusinessNotDiscontinuedOperation	-800000	USD

Files In Submission

Name	View Source	Status
0001104659-13-079067-index-headers.html	Edgar Link	pending
0001104659-13-079067-index.html	Edgar Link	pending
0001104659-13-079067.txt	Edgar Link	pending
0001104659-13-079067-xbrl.zip	Edgar Link	pending
a13-19451_110q.htm	Edgar Link	pending
a13-19451_1ex12.htm	Edgar Link	pending
a13-19451_1ex31d1.htm	Edgar Link	pending
a13-19451_1ex31d2.htm	Edgar Link	pending
a13-19451_1ex32d1.htm	Edgar Link	pending
a13-19451_1ex32d2.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xls	Edgar Link	pending
Financial_Report.xlsx	Edgar Link	pending
g194511gci001.gif	Edgar Link	pending
pfg-20130930.xml	Edgar Link	completed
pfg-20130930.xsd	Edgar Link	pending
pfg-20130930_cal.xml	Edgar Link	unprocessable
pfg-20130930_def.xml	Edgar Link	unprocessable
pfg-20130930_lab.xml	Edgar Link	unprocessable
pfg-20130930_pre.xml	Edgar Link	unprocessable
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
R13.htm	Edgar Link	pending
R14.htm	Edgar Link	pending
R15.htm	Edgar Link	pending
R16.htm	Edgar Link	pending
R17.htm	Edgar Link	pending
R18.htm	Edgar Link	pending
R19.htm	Edgar Link	pending
R2.htm	Edgar Link	pending
R20.htm	Edgar Link	pending
R21.htm	Edgar Link	pending
R22.htm	Edgar Link	pending
R23.htm	Edgar Link	pending
R24.htm	Edgar Link	pending
R25.htm	Edgar Link	pending
R26.htm	Edgar Link	pending
R27.htm	Edgar Link	pending
R28.htm	Edgar Link	pending
R29.htm	Edgar Link	pending
R3.htm	Edgar Link	pending
R30.htm	Edgar Link	pending
R31.htm	Edgar Link	pending
R32.htm	Edgar Link	pending
R33.htm	Edgar Link	pending
R34.htm	Edgar Link	pending
R35.htm	Edgar Link	pending
R36.htm	Edgar Link	pending
R37.htm	Edgar Link	pending
R38.htm	Edgar Link	pending
R39.htm	Edgar Link	pending
R4.htm	Edgar Link	pending
R40.htm	Edgar Link	pending
R41.htm	Edgar Link	pending
R42.htm	Edgar Link	pending
R43.htm	Edgar Link	pending
R44.htm	Edgar Link	pending
R45.htm	Edgar Link	pending
R46.htm	Edgar Link	pending
R47.htm	Edgar Link	pending
R48.htm	Edgar Link	pending
R49.htm	Edgar Link	pending
R5.htm	Edgar Link	pending
R50.htm	Edgar Link	pending
R51.htm	Edgar Link	pending
R52.htm	Edgar Link	pending
R53.htm	Edgar Link	pending
R54.htm	Edgar Link	pending
R55.htm	Edgar Link	pending
R56.htm	Edgar Link	pending
R57.htm	Edgar Link	pending
R58.htm	Edgar Link	pending
R59.htm	Edgar Link	pending
R6.htm	Edgar Link	pending
R60.htm	Edgar Link	pending
R61.htm	Edgar Link	pending
R62.htm	Edgar Link	pending
R63.htm	Edgar Link	pending
R64.htm	Edgar Link	pending
R65.htm	Edgar Link	pending
R66.htm	Edgar Link	pending
R67.htm	Edgar Link	pending
R68.htm	Edgar Link	pending
R69.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R70.htm	Edgar Link	pending
R71.htm	Edgar Link	pending
R72.htm	Edgar Link	pending
R73.htm	Edgar Link	pending
R74.htm	Edgar Link	pending
R75.htm	Edgar Link	pending
R76.htm	Edgar Link	pending
R77.htm	Edgar Link	pending
R78.htm	Edgar Link	pending
R79.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R80.htm	Edgar Link	pending
R81.htm	Edgar Link	pending
R82.htm	Edgar Link	pending
R83.htm	Edgar Link	pending
R84.htm	Edgar Link	pending
R85.htm	Edgar Link	pending
R86.htm	Edgar Link	pending
R87.htm	Edgar Link	pending
R88.htm	Edgar Link	pending
R89.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
R90.htm	Edgar Link	pending
R91.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending

Create your account

Find Stocks Worth Researching

Deeply Understand Businesses

Value Businesses Intelligently

$PFG
PRINCIPAL FINANCIAL GROUP INC Stock $pfg

2013 Q4 Form 10-Q Financial Statement

#000110465913079067 Filed on October 30, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$PFG PRINCIPAL FINANCIAL GROUP INC Stock $pfg

2013 Q4 Form 10-Q Financial Statement

#000110465913079067 Filed on October 30, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$PFG
PRINCIPAL FINANCIAL GROUP INC Stock $pfg