$PFG
PRINCIPAL FINANCIAL GROUP INC Stock $pfg

$pfg Overview Financials Valuation SEC Filings Company Website

2012 Q4 Form 10-Q Financial Statement

#000110465912072563 Filed on October 31, 2012

Income Statement

Concept	2012 Q4	2012 Q3	2011 Q3
Revenue	$2.296B	$2.705B	$2.094B
YoY Change	11.52%	29.19%	-10.7%
Cost Of Revenue	$1.154B	$1.647B	$1.115B
YoY Change		47.73%
Gross Profit	$1.142B	$1.058B	$978.7M
YoY Change		8.07%
Gross Profit Margin	49.72%	39.11%	46.75%
Selling, General & Admin	$48.20M	$49.70M	$52.20M
YoY Change	-6.41%	-4.79%	-1.88%
% of Gross Profit	4.22%	4.7%	5.33%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$100.3M	$116.9M	$150.9M
YoY Change	23.83%	-22.53%	12.95%
% of Gross Profit	8.79%	11.05%	15.42%
Operating Expenses	$2.029B	$2.513B	$1.943B
YoY Change	7.46%	29.37%	-8.59%
Operating Profit	-$887.9M	-$1.455B	-$963.8M
YoY Change		51.01%
Interest Expense
YoY Change
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$266.5M	$191.6M	$151.1M
YoY Change	56.49%	26.8%	-7.58%
Income Tax	$34.20M	-$7.200M	$76.60M
% Of Pretax Income	12.83%	-3.76%	50.69%
Net Earnings	$223.2M	$195.4M	$80.10M
YoY Change	42.71%	143.95%	-46.74%
Net Earnings / Revenue	9.72%	7.22%	3.83%
Basic Earnings Per Share	$0.72	$0.64	$0.23
Diluted Earnings Per Share	$0.72	$0.63	$0.23
COMMON SHARES
Basic Shares Outstanding	293.6M shares	294.7M shares	311.9M shares
Diluted Shares Outstanding		297.5M shares	314.8M shares

Balance Sheet

Concept	2012 Q4	2012 Q3	2011 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments
YoY Change
Cash & Equivalents	$4.177B	$2.279B	$1.434B
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	$464.2M	$468.4M	$448.0M
YoY Change	1.53%	4.55%	-2.82%
Goodwill	$543.4M	$548.9M
YoY Change	12.67%
Intangibles	$914.7M	$927.4M
YoY Change	2.71%
Long-Term Investments	$869.0M	$837.7M	$65.77B
YoY Change	5.04%	-98.73%	-0.66%
Other Assets
YoY Change
Total Long-Term Assets
YoY Change
TOTAL ASSETS
Total Short-Term Assets
Total Long-Term Assets
Total Assets	$161.8B	$159.2B	$142.3B
YoY Change	9.82%	11.87%	-0.81%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable
YoY Change
Accrued Expenses
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$40.80M	$28.50M	$74.00M
YoY Change	-61.22%	-61.49%	-43.94%
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$56.00M	$36.00M	$77.00M
YoY Change	-48.15%	-53.25%	-43.38%
LONG-TERM LIABILITIES
Long-Term Debt	$2.671B	$2.180B	$1.570B
YoY Change	70.67%	38.85%	-0.76%
Other Long-Term Liabilities	$6.146B	$5.974B	$6.266B
YoY Change	-2.23%	-4.66%	-5.06%
Total Long-Term Liabilities	$8.817B	$8.154B	$7.836B
YoY Change	12.3%	4.06%	-4.23%
TOTAL LIABILITIES
Total Short-Term Liabilities	$56.00M	$36.00M	$77.00M
Total Long-Term Liabilities	$8.817B	$8.154B	$7.836B
Total Liabilities	$152.1B	$149.3B	$133.0B
YoY Change	10.22%	12.26%	-0.43%
SHAREHOLDERS EQUITY
Retained Earnings	$4.862B	$4.784B
YoY Change	10.44%
Common Stock	$4.500M	$4.500M
YoY Change	0.0%
Preferred Stock
YoY Change
Treasury Stock (at cost)	$5.554B	$5.554B
YoY Change	5.16%
Treasury Stock Shares	159.7M shares	159.7M shares
Shareholders Equity	$9.683B	$9.828B	$9.312B
YoY Change
Total Liabilities & Shareholders Equity	$161.8B	$159.2B	$142.3B
YoY Change	9.82%	11.87%	-0.81%

Cashflow Statement

Concept	2012 Q4	2012 Q3	2011 Q3
OPERATING ACTIVITIES
Net Income	$223.2M	$195.4M	$80.10M
YoY Change	42.71%	143.95%	-46.74%
Depreciation, Depletion And Amortization	$100.3M	$116.9M	$150.9M
YoY Change	23.83%	-22.53%	12.95%
Cash From Operating Activities	$707.1M	$871.7M	$99.90M
YoY Change	-14.59%	772.57%	-77.56%
INVESTING ACTIVITIES
Capital Expenditures	-$3.300M	-$10.90M	-$14.10M
YoY Change	-86.42%	-22.7%	403.57%
Acquisitions
YoY Change
Other Investing Activities	$111.2M	-$881.5M	-$868.9M
YoY Change	-225.37%	1.45%	-217.15%
Cash From Investing Activities	$107.9M	-$892.4M	-$883.0M
YoY Change	-195.49%	1.06%	-219.5%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	1.083B	653.1M	47.70M
YoY Change	58.18%	1269.18%	-106.42%
NET CHANGE
Cash From Operating Activities	707.1M	871.7M	99.90M
Cash From Investing Activities	107.9M	-892.4M	-883.0M
Cash From Financing Activities	1.083B	653.1M	47.70M
Net Change In Cash	1.898B	632.4M	-735.4M
YoY Change	35.61%	-185.99%	-266.57%
FREE CASH FLOW
Cash From Operating Activities	$707.1M	$871.7M	$99.90M
Capital Expenditures	-$3.300M	-$10.90M	-$14.10M
Free Cash Flow	$710.4M	$882.6M	$114.0M
YoY Change	-16.64%	674.21%	-74.55%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2011Q4	pfg	Other Investments As Defined OtherInvestmentsAsDefined	2985800000	USD
CY2011Q4	us-gaap	Premiums And Other Receivables Net PremiumsAndOtherReceivablesNet	1196500000	USD
CY2011Q4	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	2428000000	USD
CY2011Q4	us-gaap	Liability For Future Policy Benefits And Unpaid Claims And Claims Adjustment Expense LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense	20210400000	USD
CY2011Q4	us-gaap	Other Policyholder Funds OtherPolicyholderFunds	548600000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	208700000	USD
CY2011Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	4402300000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	258000000	USD
CY2011Q3	us-gaap	Fees And Commissions FeesAndCommissions	636400000	USD
CY2011Q3	us-gaap	Net Investment Income NetInvestmentIncome	815200000	USD
CY2011Q3	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	1114900000	USD
CY2011Q3	pfg	Operating Expenses Including Deferred Acquisition Costs Capitalization And Amortization OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization	775400000	USD
CY2011Q3	pfg	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	151100000	USD
CY2011Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	76600000	USD
CY2011Q3	us-gaap	Profit Loss ProfitLoss	74500000	USD
CY2011Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	71900000	USD
CY2011Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.23
CY2011Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.23
	us-gaap	Fees And Commissions FeesAndCommissions	1892600000	USD
	us-gaap	Net Investment Income NetInvestmentIncome	2548600000	USD
	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	3497700000	USD
	pfg	Operating Expenses Including Deferred Acquisition Costs Capitalization And Amortization OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization	2232700000	USD
	pfg	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	722800000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	190300000	USD
	us-gaap	Profit Loss ProfitLoss	532500000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	471200000	USD
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.48
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.47
CY2012Q3	us-gaap	Premiums And Other Receivables Net PremiumsAndOtherReceivablesNet	1192200000	USD
CY2012Q3	us-gaap	Deferred Policy Acquisition Costs DeferredPolicyAcquisitionCosts	2558500000	USD
CY2012Q3	us-gaap	Liability For Future Policy Benefits And Unpaid Claims And Claims Adjustment Expense LiabilityForFuturePolicyBenefitsAndUnpaidClaimsAndClaimsAdjustmentExpense	21952000000	USD
CY2012Q3	us-gaap	Other Policyholder Funds OtherPolicyholderFunds	720800000	USD
CY2012Q3	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	951500000	USD
CY2012Q3	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	4784300000	USD
CY2012Q3	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	880800000	USD
CY2012Q3	us-gaap	Fees And Commissions FeesAndCommissions	675000000	USD
CY2012Q3	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	1647000000	USD
CY2012Q3	pfg	Operating Expenses Including Deferred Acquisition Costs Capitalization And Amortization OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization	826600000	USD
CY2012Q3	pfg	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	181400000	USD
CY2012Q3	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	-9900000	USD
CY2012Q3	us-gaap	Profit Loss ProfitLoss	191300000	USD
CY2012Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	179700000	USD
	pfg	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold Change In Status OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSoldChangeInStatus	63300000	USD
CY2012Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.61
CY2012Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.60
	us-gaap	Fees And Commissions FeesAndCommissions	1909100000	USD
	us-gaap	Policyholder Benefits And Claims Incurred Net PolicyholderBenefitsAndClaimsIncurredNet	3969500000	USD
	pfg	Operating Expenses Including Deferred Acquisition Costs Capitalization And Amortization OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization	2106700000	USD
	pfg	Income Loss From Continuing Operations Before Income Taxes IncomeLossFromContinuingOperationsBeforeIncomeTaxes	693500000	USD
	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	99200000	USD
	us-gaap	Profit Loss ProfitLoss	594300000	USD
	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	554300000	USD
	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.86
	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.84
CY2011Q4	pfg	Separate Account With Shares Of Principal Financial Group Stock SeparateAccountWithSharesOfPrincipalFinancialGroupStock	146500000	USD
CY2011Q4	pfg	Total Assets Unconsolidated Money Market Mutual Fund Variable Interest Entities TotalAssetsUnconsolidatedMoneyMarketMutualFundVariableInterestEntities	1700000000	USD
CY2012Q3	pfg	Total Assets Unconsolidated Money Market Mutual Fund Variable Interest Entities TotalAssetsUnconsolidatedMoneyMarketMutualFundVariableInterestEntities	1400000000	USD
CY2012Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearAmortizedCost	3829600000	USD
CY2012Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsAmortizedCost	12706200000	USD
CY2012Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsAmortizedCost	9289400000	USD
CY2012Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsAmortizedCost	11296000000	USD
CY2012Q3	pfg	Available For Sale Securities Debt Maturities With Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithSingleMaturityDateAmortizedCost	37121200000	USD
CY2012Q3	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateAmortizedCost	11336000000	USD
CY2012Q3	us-gaap	Available For Sale Securities Debt Maturities Amortized Cost AvailableForSaleSecuritiesDebtMaturitiesAmortizedCost	48457200000	USD
CY2012Q3	us-gaap	Available For Sale Securities Debt Maturities Within One Year Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithinOneYearFairValue	3892500000	USD
CY2012Q3	us-gaap	Available For Sale Securities Debt Maturities After One Through Five Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterOneThroughFiveYearsFairValue	13387200000	USD
CY2012Q3	us-gaap	Available For Sale Securities Debt Maturities After Five Through Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterFiveThroughTenYearsFairValue	10410000000	USD
CY2012Q3	us-gaap	Available For Sale Securities Debt Maturities After Ten Years Fair Value AvailableForSaleSecuritiesDebtMaturitiesAfterTenYearsFairValue	12610000000	USD
CY2012Q3	pfg	Available For Sale Securities Debt Maturities With Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithSingleMaturityDateFairValue	40299700000	USD
CY2012Q3	us-gaap	Available For Sale Securities Debt Maturities Without Single Maturity Date Fair Value AvailableForSaleSecuritiesDebtMaturitiesWithoutSingleMaturityDateFairValue	11234200000	USD
CY2012Q3	us-gaap	Available For Sale Securities Debt Securities AvailableForSaleSecuritiesDebtSecurities	51533900000	USD
CY2012Q3	pfg	Available For Sale Debt Securities Gross Realized Gain AvailableForSaleDebtSecuritiesGrossRealizedGain	3000000	USD
CY2012Q3	pfg	Available For Sale Debt Securities Gross Realized Loss AvailableForSaleDebtSecuritiesGrossRealizedLoss	44100000	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
CY2012Q3	pfg	Available For Sale Debt Securities Hedging Net AvailableForSaleDebtSecuritiesHedgingNet	1000000	USD
CY2012Q3	pfg	Trading Debt Securities Realized Gain Loss TradingDebtSecuritiesRealizedGainLoss	4700000	USD
CY2012Q3	pfg	Available For Sale Equity Securities Gross Realized Gain AvailableForSaleEquitySecuritiesGrossRealizedGain	500000	USD
CY2012Q3	pfg	Available For Sale Equity Securities Gross Realized Loss AvailableForSaleEquitySecuritiesGrossRealizedLoss	600000	USD
CY2012Q3	pfg	Trading Equity Securities Realized Gain Loss TradingEquitySecuritiesRealizedGainLoss	-100000	USD
CY2012Q3	pfg	Mortgage Loan Realized Gain Loss MortgageLoanRealizedGainLoss	-23300000	USD
CY2012Q3	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-50500000	USD
CY2012Q3	pfg	Other Realized Gain Loss OtherRealizedGainLoss	187900000	USD
CY2012Q3	us-gaap	Gain Loss On Investments GainLossOnInvestments	87700000	USD
	pfg	Available For Sale Debt Securities Gross Realized Gain AvailableForSaleDebtSecuritiesGrossRealizedGain	22700000	USD
	pfg	Available For Sale Debt Securities Gross Realized Loss AvailableForSaleDebtSecuritiesGrossRealizedLoss	131000000	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
	pfg	Available For Sale Debt Securities Hedging Net AvailableForSaleDebtSecuritiesHedgingNet	7700000	USD
	pfg	Trading Debt Securities Realized Gain Loss TradingDebtSecuritiesRealizedGainLoss	5700000	USD
	pfg	Available For Sale Equity Securities Gross Realized Gain AvailableForSaleEquitySecuritiesGrossRealizedGain	600000	USD
	pfg	Available For Sale Equity Securities Gross Realized Loss AvailableForSaleEquitySecuritiesGrossRealizedLoss	600000	USD
	pfg	Trading Equity Securities Realized Gain Loss TradingEquitySecuritiesRealizedGainLoss	30600000	USD
	pfg	Mortgage Loan Realized Gain Loss MortgageLoanRealizedGainLoss	-44600000	USD
	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-20100000	USD
	pfg	Other Realized Gain Loss OtherRealizedGainLoss	179000000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	81200000	USD
CY2011Q3	pfg	Available For Sale Debt Securities Gross Realized Gain AvailableForSaleDebtSecuritiesGrossRealizedGain	5400000	USD
	pfg	Available For Sale Equity Securities Gross Realized Gain AvailableForSaleEquitySecuritiesGrossRealizedGain	2300000	USD
	pfg	Available For Sale Equity Securities Gross Realized Loss AvailableForSaleEquitySecuritiesGrossRealizedLoss	4500000	USD
	pfg	Trading Equity Securities Realized Gain Loss TradingEquitySecuritiesRealizedGainLoss	20800000	USD
	pfg	Mortgage Loan Realized Gain Loss MortgageLoanRealizedGainLoss	-35000000	USD
	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-161400000	USD
	pfg	Other Realized Gain Loss OtherRealizedGainLoss	133600000	USD
	us-gaap	Gain Loss On Investments GainLossOnInvestments	-51000000	USD
CY2012Q3	us-gaap	Available For Sale Securities Gross Realized Gains Losses Sale Proceeds AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds	300000000	USD
CY2011Q3	us-gaap	Available For Sale Securities Gross Realized Gains Losses Sale Proceeds AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds	100000000	USD
	us-gaap	Available For Sale Securities Gross Realized Gains Losses Sale Proceeds AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds	1000000000	USD
CY2011Q3	pfg	Available For Sale Debt Securities Gross Realized Loss AvailableForSaleDebtSecuritiesGrossRealizedLoss	13300000	USD
CY2011Q3	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	34900000	USD
CY2011Q3	pfg	Available For Sale Debt Securities Hedging Net AvailableForSaleDebtSecuritiesHedgingNet	110100000	USD
CY2011Q3	pfg	Trading Debt Securities Realized Gain Loss TradingDebtSecuritiesRealizedGainLoss	-11200000	USD
CY2011Q3	pfg	Available For Sale Equity Securities Gross Realized Gain AvailableForSaleEquitySecuritiesGrossRealizedGain	100000	USD
CY2011Q3	pfg	Trading Equity Securities Realized Gain Loss TradingEquitySecuritiesRealizedGainLoss	-35800000	USD
CY2011Q3	pfg	Mortgage Loan Realized Gain Loss MortgageLoanRealizedGainLoss	-13000000	USD
CY2011Q3	us-gaap	Gain Loss On Derivative Instruments Net Pretax GainLossOnDerivativeInstrumentsNetPretax	-105700000	USD
CY2011Q3	pfg	Other Realized Gain Loss OtherRealizedGainLoss	67600000	USD
CY2011Q3	us-gaap	Gain Loss On Investments GainLossOnInvestments	-30700000	USD
	pfg	Available For Sale Debt Securities Gross Realized Gain AvailableForSaleDebtSecuritiesGrossRealizedGain	23600000	USD
	pfg	Available For Sale Debt Securities Gross Realized Loss AvailableForSaleDebtSecuritiesGrossRealizedLoss	74500000	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	83000000	USD
	pfg	Available For Sale Debt Securities Hedging Net AvailableForSaleDebtSecuritiesHedgingNet	139600000	USD
	pfg	Trading Debt Securities Realized Gain Loss TradingDebtSecuritiesRealizedGainLoss	-12500000	USD
	us-gaap	Available For Sale Securities Gross Realized Gains Losses Sale Proceeds AvailableForSaleSecuritiesGrossRealizedGainsLossesSaleProceeds	800000000	USD
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
CY2011Q3	us-gaap	Other Than Temporary Impairment Losses Investments Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities	12700000	USD
CY2011Q3	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities	47600000	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsAvailableforsaleSecurities	67600000	USD
	us-gaap	Other Than Temporary Impairment Losses Investments Portion Recognized In Earnings Net Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionRecognizedInEarningsNetAvailableforsaleSecurities	150600000	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
CY2011Q2	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	359700000	USD
CY2011Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	393400000	USD
CY2010Q4	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Credit Losses On Debt Securities Held OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsCreditLossesOnDebtSecuritiesHeld	325700000	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	434900000	USD
CY2012Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions No Previous Impairment OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsNoPreviousImpairment	2200000	USD
CY2012Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Additions Additional Credit Losses OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsAdditionsAdditionalCreditLosses	20900000	USD
CY2012Q3	pfg	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Securities Sold Change In Status OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsSecuritiesSoldChangeInStatus	32400000	USD
CY2012Q3	us-gaap	Other Than Temporary Impairment Credit Losses Recognized In Earnings Reductions Cash Flows OtherThanTemporaryImpairmentCreditLossesRecognizedInEarningsReductionsCashFlows	2800000	USD
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	pfg	Adjustments For Assumed Changes In Amortization Patterns Other Than Temporary Impairment Losses Before Tax AdjustmentsForAssumedChangesInAmortizationPatternsOtherThanTemporaryImpairmentLossesBeforeTax	-12900000	USD
CY2012Q3	pfg	Other Comprehensive Income Reclassification Adjustment Before Tax OtherComprehensiveIncomeReclassificationAdjustmentBeforeTax	6200000	USD
	pfg	Other Comprehensive Income Reclassification Adjustment Before Tax OtherComprehensiveIncomeReclassificationAdjustmentBeforeTax	22700000	USD
CY2011Q3	pfg	Other Comprehensive Income Reclassification Adjustment Before Tax OtherComprehensiveIncomeReclassificationAdjustmentBeforeTax	-29000000	USD
	pfg	Other Comprehensive Income Reclassification Adjustment Before Tax OtherComprehensiveIncomeReclassificationAdjustmentBeforeTax	-70600000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	-23900000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	5600000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	73000000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax	40000000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeBeforeTax	-500000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeBeforeTax	10200000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeBeforeTax	-800000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeBeforeTax	14200000	USD
CY2012Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Derivatives Before Tax AdjustmentsForAssumedChangesInAmortizationPatternsDerivativesBeforeTax	3500000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Derivatives Before Tax AdjustmentsForAssumedChangesInAmortizationPatternsDerivativesBeforeTax	-26400000	USD
CY2011Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Derivatives Before Tax AdjustmentsForAssumedChangesInAmortizationPatternsDerivativesBeforeTax	22800000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Derivatives Before Tax AdjustmentsForAssumedChangesInAmortizationPatternsDerivativesBeforeTax	24000000	USD
CY2012Q3	pfg	Other Comprehensive Income Derivatives Period Increase Decrease Before Tax OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseBeforeTax	-27900000	USD
	pfg	Other Comprehensive Income Derivatives Period Increase Decrease Before Tax OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseBeforeTax	42200000	USD
CY2011Q3	pfg	Other Comprehensive Income Derivatives Period Increase Decrease Before Tax OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseBeforeTax	49400000	USD
	pfg	Other Comprehensive Income Derivatives Period Increase Decrease Before Tax OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseBeforeTax	30200000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	49200000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	11200000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-138500000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Transaction And Translation Adjustment Before Tax OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationAdjustmentBeforeTax	-46000000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax	312900000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments And Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsAndTax	276800000	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
	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
CY2011Q3	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	-3000000	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	-8800000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-13400000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	-40300000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	309900000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeTax	268000000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	478300000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	904700000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	-353900000	USD
	us-gaap	Other Comprehensive Income Loss Before Tax OtherComprehensiveIncomeLossBeforeTax	295200000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	273500000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	468900000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	2800000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodTax	207000000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	20300000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	34300000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	4400000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeTax	12500000	USD
CY2012Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Available For Sale Securities Tax AdjustmentsForAssumedChangesInAmortizationPatternsAvailableForSaleSecuritiesTax	51100000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Available For Sale Securities Tax AdjustmentsForAssumedChangesInAmortizationPatternsAvailableForSaleSecuritiesTax	78900000	USD
CY2011Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Available For Sale Securities Tax AdjustmentsForAssumedChangesInAmortizationPatternsAvailableForSaleSecuritiesTax	-7600000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Available For Sale Securities Tax AdjustmentsForAssumedChangesInAmortizationPatternsAvailableForSaleSecuritiesTax	34500000	USD
CY2012Q3	pfg	Adjustments For Assumed Changes In Liability For Policyholder Benefits And Claims Tax AdjustmentsForAssumedChangesInLiabilityForPolicyholderBenefitsAndClaimsTax	88900000	USD
	pfg	Adjustments For Assumed Changes In Liability For Policyholder Benefits And Claims Tax AdjustmentsForAssumedChangesInLiabilityForPolicyholderBenefitsAndClaimsTax	148600000	USD
CY2011Q3	pfg	Adjustments For Assumed Changes In Liability For Policyholder Benefits And Claims Tax AdjustmentsForAssumedChangesInLiabilityForPolicyholderBenefitsAndClaimsTax	6100000	USD
	pfg	Adjustments For Assumed Changes In Liability For Policyholder Benefits And Claims Tax AdjustmentsForAssumedChangesInLiabilityForPolicyholderBenefitsAndClaimsTax	6100000	USD
CY2012Q3	pfg	Other Comprehensive Income Available For Sale Securities Period Increase Decrease Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseTax	153800000	USD
	pfg	Other Comprehensive Income Available For Sale Securities Period Increase Decrease Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseTax	275700000	USD
CY2011Q3	pfg	Other Comprehensive Income Available For Sale Securities Period Increase Decrease Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseTax	8700000	USD
	pfg	Other Comprehensive Income Available For Sale Securities Period Increase Decrease Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseTax	178900000	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
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CY2011Q3	us-gaap	Other Than Temporary Impairment Losses Investments Portion In Other Comprehensive Income Loss Tax Including Portion Attributable To Noncontrolling Interest Availableforsale Securities OtherThanTemporaryImpairmentLossesInvestmentsPortionInOtherComprehensiveIncomeLossTaxIncludingPortionAttributableToNoncontrollingInterestAvailableforsaleSecurities	-12300000	USD
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CY2012Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Other Than Temporary Impairment Losses Tax AdjustmentsForAssumedChangesInAmortizationPatternsOtherThanTemporaryImpairmentLossesTax	1000000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Other Than Temporary Impairment Losses Tax AdjustmentsForAssumedChangesInAmortizationPatternsOtherThanTemporaryImpairmentLossesTax	3000000	USD
CY2011Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Other Than Temporary Impairment Losses Tax AdjustmentsForAssumedChangesInAmortizationPatternsOtherThanTemporaryImpairmentLossesTax	-2200000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Other Than Temporary Impairment Losses Tax AdjustmentsForAssumedChangesInAmortizationPatternsOtherThanTemporaryImpairmentLossesTax	-4500000	USD
CY2012Q3	pfg	Other Comprehensive Income Reclassification Adjustment Tax OtherComprehensiveIncomeReclassificationAdjustmentTax	2200000	USD
	pfg	Other Comprehensive Income Reclassification Adjustment Tax OtherComprehensiveIncomeReclassificationAdjustmentTax	7900000	USD
CY2011Q3	pfg	Other Comprehensive Income Reclassification Adjustment Tax OtherComprehensiveIncomeReclassificationAdjustmentTax	-10100000	USD
	pfg	Other Comprehensive Income Reclassification Adjustment Tax OtherComprehensiveIncomeReclassificationAdjustmentTax	-25400000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-8300000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	2000000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	25500000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	14000000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeTax	-200000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeTax	3700000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeTax	-200000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeTax	5100000	USD
CY2012Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Derivatives Tax AdjustmentsForAssumedChangesInAmortizationPatternsDerivativesTax	1200000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Derivatives Tax AdjustmentsForAssumedChangesInAmortizationPatternsDerivativesTax	-9300000	USD
CY2011Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Derivatives Tax AdjustmentsForAssumedChangesInAmortizationPatternsDerivativesTax	8000000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Derivatives Tax AdjustmentsForAssumedChangesInAmortizationPatternsDerivativesTax	8400000	USD
CY2012Q3	pfg	Other Comprehensive Income Derivatives Period Increase Decrease Tax OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseTax	-9700000	USD
	pfg	Other Comprehensive Income Derivatives Period Increase Decrease Tax OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseTax	15000000	USD
CY2011Q3	pfg	Other Comprehensive Income Derivatives Period Increase Decrease Tax OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseTax	17300000	USD
	pfg	Other Comprehensive Income Derivatives Period Increase Decrease Tax OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseTax	10700000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	600000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	-16000000	USD
	us-gaap	Other Comprehensive Income Loss Foreign Currency Translation Adjustment Tax OtherComprehensiveIncomeLossForeignCurrencyTranslationAdjustmentTax	18900000	USD
CY2011Q3	pfg	Other Comprehensive Income Defined Benefit Plans Net Prior Service Cost And Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetPriorServiceCostAndNetUnamortizedGainLossArisingDuringPeriodTax	-109500000	USD
	pfg	Other Comprehensive Income Defined Benefit Plans Net Prior Service Cost And Net Unamortized Gain Loss Arising During Period Tax OtherComprehensiveIncomeDefinedBenefitPlansNetPriorServiceCostAndNetUnamortizedGainLossArisingDuringPeriodTax	-96900000	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
	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
CY2011Q3	pfg	Other Comprehensive Income Reclassification Of Defined Benefit Plans Prior Service Cost And Net Gain Loss Recognized In Net Periodic Benefit Cost Tax OtherComprehensiveIncomeReclassificationOfDefinedBenefitPlansPriorServiceCostAndNetGainLossRecognizedInNetPeriodicBenefitCostTax	-1100000	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	-3100000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-4700000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	-14100000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	108400000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansTax	93800000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	147200000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	280900000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	-74400000	USD
	us-gaap	Other Comprehensive Income Loss Tax OtherComprehensiveIncomeLossTax	140100000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	537200000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	967800000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	56100000	USD
	us-gaap	Other Comprehensive Income Unrealized Holding Gain Loss On Securities Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedHoldingGainLossOnSecuritiesArisingDuringPeriodNetOfTax	398800000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	36100000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	62200000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	3000000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment For Sale Of Securities Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentForSaleOfSecuritiesIncludedInNetIncomeNetOfTax	22000000	USD
CY2012Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Available For Sale Securities Net Of Tax AdjustmentsForAssumedChangesInAmortizationPatternsAvailableForSaleSecuritiesNetOfTax	94700000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Available For Sale Securities Net Of Tax AdjustmentsForAssumedChangesInAmortizationPatternsAvailableForSaleSecuritiesNetOfTax	146500000	USD
CY2011Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Available For Sale Securities Net Of Tax AdjustmentsForAssumedChangesInAmortizationPatternsAvailableForSaleSecuritiesNetOfTax	-14000000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Available For Sale Securities Net Of Tax AdjustmentsForAssumedChangesInAmortizationPatternsAvailableForSaleSecuritiesNetOfTax	64100000	USD
CY2012Q3	pfg	Adjustments For Assumed Changes In Liability For Policyholder Benefits And Claims Net Of Tax AdjustmentsForAssumedChangesInLiabilityForPolicyholderBenefitsAndClaimsNetOfTax	182600000	USD
	pfg	Adjustments For Assumed Changes In Liability For Policyholder Benefits And Claims Net Of Tax AdjustmentsForAssumedChangesInLiabilityForPolicyholderBenefitsAndClaimsNetOfTax	325500000	USD
CY2011Q3	pfg	Adjustments For Assumed Changes In Liability For Policyholder Benefits And Claims Net Of Tax AdjustmentsForAssumedChangesInLiabilityForPolicyholderBenefitsAndClaimsNetOfTax	65700000	USD
	pfg	Adjustments For Assumed Changes In Liability For Policyholder Benefits And Claims Net Of Tax AdjustmentsForAssumedChangesInLiabilityForPolicyholderBenefitsAndClaimsNetOfTax	27200000	USD
CY2012Q3	pfg	Other Comprehensive Income Available For Sale Securities Period Increase Decrease Net Of Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax	296000000	USD
	pfg	Other Comprehensive Income Available For Sale Securities Period Increase Decrease Net Of Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax	558000000	USD
CY2011Q3	pfg	Other Comprehensive Income Available For Sale Securities Period Increase Decrease Net Of Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax	7400000	USD
	pfg	Other Comprehensive Income Available For Sale Securities Period Increase Decrease Net Of Tax OtherComprehensiveIncomeAvailableForSaleSecuritiesPeriodIncreaseDecreaseNetOfTax	329500000	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
	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
CY2011Q3	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	-23100000	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	-53600000	USD
CY2012Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Noncredit Impairment Losses Net Of Tax AdjustmentsForAssumedChangesInAmortizationPatternsNoncreditImpairmentLossesNetOfTax	2000000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Noncredit Impairment Losses Net Of Tax AdjustmentsForAssumedChangesInAmortizationPatternsNoncreditImpairmentLossesNetOfTax	5500000	USD
CY2011Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Noncredit Impairment Losses Net Of Tax AdjustmentsForAssumedChangesInAmortizationPatternsNoncreditImpairmentLossesNetOfTax	-4200000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Noncredit Impairment Losses Net Of Tax AdjustmentsForAssumedChangesInAmortizationPatternsNoncreditImpairmentLossesNetOfTax	-8400000	USD
CY2012Q3	pfg	Other Comprehensive Income Reclassification Adjustment Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentNetOfTax	4000000	USD
	pfg	Other Comprehensive Income Reclassification Adjustment Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentNetOfTax	14800000	USD
CY2011Q3	pfg	Other Comprehensive Income Reclassification Adjustment Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentNetOfTax	-18900000	USD
	pfg	Other Comprehensive Income Reclassification Adjustment Net Of Tax OtherComprehensiveIncomeReclassificationAdjustmentNetOfTax	-45200000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-15600000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	3600000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	47500000	USD
	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	26000000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	-300000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	6500000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	-600000	USD
	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Net Of Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeNetOfTax	9100000	USD
CY2012Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Derivatives Net Of Tax AdjustmentsForAssumedChangesInAmortizationPatternsDerivativesNetOfTax	2300000	USD
	pfg	Adjustments For Assumed Changes In Amortization Patterns Derivatives Net Of Tax AdjustmentsForAssumedChangesInAmortizationPatternsDerivativesNetOfTax	-17100000	USD
CY2011Q3	pfg	Adjustments For Assumed Changes In Amortization Patterns Derivatives Net Of Tax AdjustmentsForAssumedChangesInAmortizationPatternsDerivativesNetOfTax	14800000	USD
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CY2012Q3	pfg	Other Comprehensive Income Derivatives Period Increase Decrease Net Of Tax OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTax	-18200000	USD
	pfg	Other Comprehensive Income Derivatives Period Increase Decrease Net Of Tax OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTax	27200000	USD
CY2011Q3	pfg	Other Comprehensive Income Derivatives Period Increase Decrease Net Of Tax OtherComprehensiveIncomeDerivativesPeriodIncreaseDecreaseNetOfTax	32100000	USD
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CY2012Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	48600000	USD
	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	27200000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Arising During Period Net Of Tax OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossArisingDuringPeriodNetOfTax	-136400000	USD
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CY2011Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Before Reclassification Adjustments Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentBeforeReclassificationAdjustmentsNetOfTax	203400000	USD
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CY2011Q3	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	-1900000	USD
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CY2012Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	-8700000	USD
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CY2011Q3	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	201500000	USD
	us-gaap	Other Comprehensive Income Loss Pension And Other Postretirement Benefit Plans Adjustment Net Of Tax OtherComprehensiveIncomeLossPensionAndOtherPostretirementBenefitPlansAdjustmentNetOfTax	174200000	USD
CY2012Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	331100000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	623800000	USD
CY2011Q3	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-279500000	USD
	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	155100000	USD
CY2011Q4	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	22200000	USD
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CY2012Q3	us-gaap	Redeemable Noncontrolling Interest Equity Carrying Amount RedeemableNoncontrollingInterestEquityCarryingAmount	61000000	USD
CY2012Q3	pfg	Fixed Maturity Securities Level3 Valued Using Internal Pricing Models FixedMaturitySecuritiesLevel3ValuedUsingInternalPricingModels	0.01	pure
CY2012Q3	pfg	Group Medical Insurance Business Not Discontinued Operation GroupMedicalInsuranceBusinessNotDiscontinuedOperation	-4100000	USD
	pfg	Group Medical Insurance Business Not Discontinued Operation GroupMedicalInsuranceBusinessNotDiscontinuedOperation	-9600000	USD
CY2012Q3	pfg	Other Adjustments Charitable Contribution OtherAdjustmentsCharitableContribution	-39800000	USD
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CY2012Q3	us-gaap	Assets Assets	159193300000	USD
CY2011Q4	us-gaap	Assets Assets	147361700000	USD
CY2012Q3	us-gaap	Segment Reporting Information Revenue SegmentReportingInformationRevenue	2638600000	USD
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CY2012Q3	pfg	Exited Group Medical Insurance Business Revenues ExitedGroupMedicalInsuranceBusinessRevenues	1200000	USD
CY2012Q3	us-gaap	Revenues Revenues	2704700000	USD
CY2012Q3	pfg	Operating Earnings OperatingEarnings	134800000	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
CY2011Q3	us-gaap	Segment Reporting Information Revenue SegmentReportingInformationRevenue	2031700000	USD
CY2011Q3	pfg	Segment Reporting Information Net Realized Capital Gains Losses SegmentReportingInformationNetRealizedCapitalGainsLosses	-55800000	USD
CY2011Q3	pfg	Exited Group Medical Insurance Business Revenues ExitedGroupMedicalInsuranceBusinessRevenues	117700000	USD
CY2011Q3	us-gaap	Revenues Revenues	2093600000	USD
CY2011Q3	pfg	Operating Earnings OperatingEarnings	193200000	USD
CY2011Q3	pfg	Segment Reporting Information Net Realized Capital Gains Losses Net Of Tax And Adjustments SegmentReportingInformationNetRealizedCapitalGainsLossesNetOfTaxAndAdjustments	-56800000	USD
CY2011Q3	pfg	Segment Reporting Information Other Adjustments After Tax SegmentReportingInformationOtherAdjustmentsAfterTax	-64500000	USD
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	pfg	Operating Earnings OperatingEarnings	564100000	USD
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CY2012Q3	pfg	Derivative And Hedging Related Adjustments DerivativeAndHedgingRelatedAdjustments	22700000	USD
CY2011Q3	pfg	Derivative And Hedging Related Adjustments DerivativeAndHedgingRelatedAdjustments	25400000	USD
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CY2012Q3	pfg	Front End Fee Revenues Recognition FrontEndFeeRevenuesRecognition	-100000	USD
CY2011Q3	pfg	Front End Fee Revenues Recognition FrontEndFeeRevenuesRecognition	300000	USD
	pfg	Front End Fee Revenues Recognition FrontEndFeeRevenuesRecognition	200000	USD
CY2012Q3	pfg	Deferred Policy Acquisition And Sales Inducement Costs Amortization Expense DeferredPolicyAcquisitionAndSalesInducementCostsAmortizationExpense	-30500000	USD
CY2011Q3	pfg	Deferred Policy Acquisition And Sales Inducement Costs Amortization Expense DeferredPolicyAcquisitionAndSalesInducementCostsAmortizationExpense	43800000	USD
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	pfg	Deferred Policy Acquisition And Sales Inducement Costs Amortization Expense DeferredPolicyAcquisitionAndSalesInducementCostsAmortizationExpense	37500000	USD
CY2012Q3	pfg	Capital Gains Losses Distributed CapitalGainsLossesDistributed	6800000	USD
CY2011Q3	pfg	Capital Gains Losses Distributed CapitalGainsLossesDistributed	-9700000	USD
	pfg	Capital Gains Losses Distributed CapitalGainsLossesDistributed	8700000	USD
	pfg	Capital Gains Losses Distributed CapitalGainsLossesDistributed	2000000	USD
CY2011Q3	pfg	Market Value Adjustments Embedded Derivatives MarketValueAdjustmentsEmbeddedDerivatives	900000	USD
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CY2011Q3	pfg	Noncontrolling Interest Capital Gains Losses NoncontrollingInterestCapitalGainsLosses	-6400000	USD
	pfg	Noncontrolling Interest Capital Gains Losses NoncontrollingInterestCapitalGainsLosses	8200000	USD
	pfg	Noncontrolling Interest Capital Gains Losses NoncontrollingInterestCapitalGainsLosses	30400000	USD
CY2012Q3	pfg	Net Realized Capital Gains Losses Income Taxes NetRealizedCapitalGainsLossesIncomeTaxes	-200000	USD
CY2011Q3	pfg	Net Realized Capital Gains Losses Income Taxes NetRealizedCapitalGainsLossesIncomeTaxes	-25800000	USD
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	pfg	Net Realized Capital Gains Losses Income Taxes NetRealizedCapitalGainsLossesIncomeTaxes	-41300000	USD
CY2011Q3	pfg	Court Ruling Uncertain Tax Positions Impact CourtRulingUncertainTaxPositionsImpact	-68900000	USD
CY2011Q3	pfg	Executive Life Of New York Liquidation ExecutiveLifeOfNewYorkLiquidation	-10500000	USD
CY2011Q3	pfg	Group Medical Insurance Business Not Discontinued Operation GroupMedicalInsuranceBusinessNotDiscontinuedOperation	14900000	USD
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	pfg	Executive Life Of New York Liquidation ExecutiveLifeOfNewYorkLiquidation	-10500000	USD
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CY2012Q3	pfg	Incremental Common Shares Attributable To Restricted Stock Units IncrementalCommonSharesAttributableToRestrictedStockUnits	1500000	shares
CY2012Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	3400000	USD
CY2011Q3	us-gaap	Net Income Loss Attributable To Noncontrolling Interest NetIncomeLossAttributableToNoncontrollingInterest	-5600000	USD
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CY2012Q3	us-gaap	Dividends Preferred Stock DividendsPreferredStock	8200000	USD
CY2011Q3	us-gaap	Dividends Preferred Stock DividendsPreferredStock	8200000	USD
	us-gaap	Dividends Preferred Stock DividendsPreferredStock	24700000	USD
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CY2012Q3	pfg	Incremental Common Shares Attributable To Stock Options IncrementalCommonSharesAttributableToStockOptions	1000000	shares
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CY2012Q3	pfg	Incremental Common Shares Attributable To Performance Share Awards IncrementalCommonSharesAttributableToPerformanceShareAwards	300000	shares
CY2011Q3	pfg	Incremental Common Shares Attributable To Performance Share Awards IncrementalCommonSharesAttributableToPerformanceShareAwards	400000	shares
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CY2012Q3	us-gaap	Trading Securities Debt TradingSecuritiesDebt	808000000	USD
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CY2011Q4	us-gaap	Trading Securities Debt TradingSecuritiesDebt	971700000	USD
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CY2011Q4	us-gaap	Trading Securities Equity TradingSecuritiesEquity	404800000	USD
CY2011Q4	us-gaap	Mortgage Loans On Real Estate Commercial And Consumer Net MortgageLoansOnRealEstateCommercialAndConsumerNet	10727200000	USD
CY2011Q4	us-gaap	Real Estate Investments RealEstateInvestments	1092900000	USD
CY2011Q4	us-gaap	Equity Method Investments EquityMethodInvestments	827300000	USD
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CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2833900000	USD
CY2011Q4	us-gaap	Accrued Investment Income Receivable AccruedInvestmentIncomeReceivable	615200000	USD
CY2011Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	457200000	USD
CY2011Q4	us-gaap	Goodwill Goodwill	482300000	USD
CY2011Q4	us-gaap	Intangible Assets Net Excluding Goodwill IntangibleAssetsNetExcludingGoodwill	890600000	USD
CY2011Q4	us-gaap	Separate Account Assets SeparateAccountAssets	71364400000	USD
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CY2011Q4	us-gaap	Short Term Borrowings ShortTermBorrowings	105200000	USD
CY2011Q4	us-gaap	Long Term Debt LongTermDebt	1564800000	USD
CY2011Q4	us-gaap	Accrued Income Taxes AccruedIncomeTaxes	3100000	USD
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CY2011Q4	us-gaap	Common Stock Value CommonStockValue	4500000	USD
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CY2011Q4	us-gaap	Treasury Stock Value TreasuryStockValue	5281700000	USD
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	9017900000	USD
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CY2012Q3	us-gaap	Trading Securities Equity TradingSecuritiesEquity	237600000	USD
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CY2012Q3	us-gaap	Real Estate Investments RealEstateInvestments	1208600000	USD
CY2012Q3	us-gaap	Equity Method Investments EquityMethodInvestments	837700000	USD
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CY2012Q3	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2279000000	USD
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	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 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 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	Treasury Stock Value Acquired Cost Method TreasuryStockValueAcquiredCostMethod	456400000	USD
	us-gaap	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	7400000	USD
	us-gaap	Minority Interest Increase From Stock Issuance MinorityInterestIncreaseFromStockIssuance	127000000	USD
	us-gaap	Minority Interest Decrease From Redemptions MinorityInterestDecreaseFromRedemptions	6000000	USD
	pfg	Profit Loss Excluding Redeemable Noncontrolling Interest ProfitLossExcludingRedeemableNoncontrollingInterest	532500000	USD
	us-gaap	Proceeds From Payments For Trading Securities ProceedsFromPaymentsForTradingSecurities	-193800000	USD
	us-gaap	Increase Decrease In Receivables IncreaseDecreaseInReceivables	99800000	USD
	us-gaap	Increase Decrease In Insurance Liabilities IncreaseDecreaseInInsuranceLiabilities	868700000	USD
	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	39300000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	87400000	USD
	us-gaap	Payments For Origination And Purchases Of Loans Held For Sale PaymentsForOriginationAndPurchasesOfLoansHeldForSale	117400000	USD
	us-gaap	Proceeds From Sale And Collection Of Loans Heldforsale ProceedsFromSaleAndCollectionOfLoansHeldforsale	49900000	USD
	us-gaap	Proceeds From Sale Of Wholly Owned Real Estate And Real Estate Acquired In Settlement Of Loans ProceedsFromSaleOfWhollyOwnedRealEstateAndRealEstateAcquiredInSettlementOfLoans	137800000	USD
	pfg	Other Comprehensive Income Loss Net Of Tax Excluding Redeemable Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxExcludingRedeemableNoncontrollingInterest	155100000	USD
CY2011Q3	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	9682600000	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	Minority Interest Decrease From Distributions To Noncontrolling Interest Holders MinorityInterestDecreaseFromDistributionsToNoncontrollingInterestHolders	8100000	USD
	us-gaap	Minority Interest Increase From Stock Issuance MinorityInterestIncreaseFromStockIssuance	12100000	USD
	pfg	Profit Loss Excluding Redeemable Noncontrolling Interest ProfitLossExcludingRedeemableNoncontrollingInterest	592700000	USD
	pfg	Other Comprehensive Income Loss Net Of Tax Excluding Redeemable Noncontrolling Interest OtherComprehensiveIncomeLossNetOfTaxExcludingRedeemableNoncontrollingInterest	622900000	USD
	pfg	Other Comprehensive Income Loss Attributable To Redeemable Noncontrolling Interest OtherComprehensiveIncomeLossAttributableToRedeemableNoncontrollingInterest	900000	USD
	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	222900000	USD
	us-gaap	Deferred Policy Acquisition Costs Additions DeferredPolicyAcquisitionCostsAdditions	-254300000	USD
	us-gaap	Increase Decrease In Accrued Investment Income Receivable IncreaseDecreaseInAccruedInvestmentIncomeReceivable	-2400000	USD
	us-gaap	Share Based Compensation ShareBasedCompensation	32500000	USD
	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	-526300000	USD
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	1352900000	USD
	us-gaap	Deferred Policy Acquisition Cost Amortization Expense DeferredPolicyAcquisitionCostAmortizationExpense	27400000	USD
	us-gaap	Deferred Policy Acquisition Costs Additions DeferredPolicyAcquisitionCostsAdditions	-303100000	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
	us-gaap	Increase Decrease In Income Taxes IncreaseDecreaseInIncomeTaxes	-28700000	USD
	us-gaap	Depreciation Amortization And Accretion Net DepreciationAmortizationAndAccretionNet	109200000	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	-204500000	USD
	us-gaap	Adjustments To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivities	1779400000	USD
	us-gaap	Payments To Acquire Interest In Subsidiaries And Affiliates PaymentsToAcquireInterestInSubsidiariesAndAffiliates	62500000	USD
	us-gaap	Payments Of Dividends Common Stock PaymentsOfDividendsCommonStock	169600000	USD
CY2012Q3	pfg	Separate Account With Shares Of Principal Financial Group Stock SeparateAccountWithSharesOfPrincipalFinancialGroupStock	145900000	USD
	us-gaap	Dividends Common Stock DividendsCommonStock	169600000	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	2012-09-30
	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
CY2012Q4	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	293586944	shares
	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2012
	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	Q3
CY2012Q3	pfg	Other Investments As Defined OtherInvestmentsAsDefined	3172100000	USD
CY2012Q3	us-gaap	Investments Investments	69268300000	USD
CY2011Q4	us-gaap	Investments Investments	66151300000	USD
CY2012Q3	pfg	Other Investments Fair Value Option OtherInvestmentsFairValueOption	114200000	USD
	us-gaap	Cash And Cash Equivalents Period Increase Decrease CashAndCashEquivalentsPeriodIncreaseDecrease	-554900000	USD
CY2011Q4	pfg	Other Investments Fair Value Option OtherInvestmentsFairValueOption	97500000	USD
CY2012Q3	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2011Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2012Q3	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	2500000000	shares
CY2011Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	2500000000	shares
CY2012Q3	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	453300000	shares
CY2011Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	450300000	shares
CY2012Q3	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	293600000	shares
	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-1209400000	USD
CY2011Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	301100000	shares
CY2012Q3	us-gaap	Treasury Stock Shares TreasuryStockShares	159700000	shares
CY2011Q4	us-gaap	Treasury Stock Shares TreasuryStockShares	149200000	shares
CY2011Q3	us-gaap	Premiums Earned Net PremiumsEarnedNet	672700000	USD
CY2012Q3	us-gaap	Premiums Earned Net PremiumsEarnedNet	1158200000	USD
CY2011Q3	pfg	Net Gain Loss Excluding Available For Sale Impairments NetGainLossExcludingAvailableForSaleImpairments	16900000	USD
CY2012Q3	pfg	Net Gain Loss Excluding Available For Sale Impairments NetGainLossExcludingAvailableForSaleImpairments	122100000	USD
CY2012Q3	us-gaap	Net Investment Income NetInvestmentIncome	783800000	USD
CY2011Q3	us-gaap	Policyholder Dividends PolicyholderDividends	52200000	USD
CY2012Q3	us-gaap	Policyholder Dividends PolicyholderDividends	49700000	USD
CY2011Q3	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	1942500000	USD
CY2012Q3	us-gaap	Benefits Losses And Expenses BenefitsLossesAndExpenses	2523300000	USD
CY2011Q3	us-gaap	Net Income Loss NetIncomeLoss	80100000	USD
CY2012Q3	us-gaap	Net Income Loss NetIncomeLoss	187900000	USD
CY2011Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	-205000000	USD
CY2012Q3	us-gaap	Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest	522400000	USD
CY2012Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	4200000	USD
CY2011Q3	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	-5900000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	16300000	USD
	us-gaap	Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest	36300000	USD
CY2012Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	518200000	USD
CY2011Q3	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	-199100000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	1201800000	USD
	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	651300000	USD
CY2010Q4	us-gaap	Stockholders Equity Including Portion Attributable To Noncontrolling Interest StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	9306400000	USD
	us-gaap	Stock Issued During Period Value New Issues StockIssuedDuringPeriodValueNewIssues	23200000	USD
	pfg	Share Based Compensation Including Tax Effect ShareBasedCompensationIncludingTaxEffect	32900000	USD

Files In Submission

Name	View Source	Status
0001104659-12-072563-index-headers.html	Edgar Link	pending
0001104659-12-072563-index.html	Edgar Link	pending
0001104659-12-072563.txt	Edgar Link	pending
0001104659-12-072563-xbrl.zip	Edgar Link	pending
a12-19844_110q.htm	Edgar Link	pending
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FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xls	Edgar Link	pending
g198441ba37i001.gif	Edgar Link	pending
pfg-20120930.xml	Edgar Link	completed
pfg-20120930.xsd	Edgar Link	pending
pfg-20120930_cal.xml	Edgar Link	unprocessable
pfg-20120930_def.xml	Edgar Link	unprocessable
pfg-20120930_lab.xml	Edgar Link	unprocessable
pfg-20120930_pre.xml	Edgar Link	unprocessable
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$PFG
PRINCIPAL FINANCIAL GROUP INC Stock $pfg

2012 Q4 Form 10-Q Financial Statement

#000110465912072563 Filed on October 31, 2012

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$PFG PRINCIPAL FINANCIAL GROUP INC Stock $pfg

2012 Q4 Form 10-Q Financial Statement

#000110465912072563 Filed on October 31, 2012

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$PFG
PRINCIPAL FINANCIAL GROUP INC Stock $pfg