XML 131 R116.htm IDEA: XBRL DOCUMENT v3.20.4
Employee and Agent Benefits - Net Periodic Benefit Cost (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2020
Dec. 31, 2019
Dec. 31, 2018
Plan actuarial gain and loss amortization disclosures      
Allowable corridor not used for amortization of actuarial gains and losses of qualified pension plan (as a percent) 10.00%    
Pension benefits      
Components of Net Periodic Benefit Cost (Income)      
Service cost $ 72.7 $ 66.0 $ 73.0
Interest cost $ 117.3 $ 126.5 $ 119.5
Interest cost, location on consolidated statements of operations pfg:OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization pfg:OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization pfg:OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization
Expected return on plan assets $ (156.8) $ (148.8) $ (157.0)
Expected return on plan assets, location on consolidated statements of operations pfg:OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization pfg:OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization pfg:OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization
Amortization of prior service (benefit) cost $ (16.8) $ (11.3) $ (3.4)
Amortization of prior service (benefit) cost, location on consolidated statements of operations pfg:OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization pfg:OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization pfg:OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization
Recognized net actuarial (gain) loss $ 75.4 $ 70.1 $ 67.8
Recognized net actuarial (gain) loss, location on consolidated statements of operations pfg:OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization pfg:OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization pfg:OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization
Net periodic benefit cost (income) $ 91.8 $ 102.5 $ 99.9
Other changes recognized in accumulated other comprehensive (income) loss      
Net actuarial (gain) loss 97.9 134.3  
Prior service (benefit) cost   (122.4)  
Amortization of net gain (loss) (75.4) (70.1)  
Amortization of prior service benefit (cost) 16.8 11.3  
Total recognized in pre-tax accumulated other comprehensive (income) loss 39.3 (46.9)  
Total recognized in net periodic benefit cost and pre-tax accumulated other comprehensive (income) loss 131.1 55.6  
Other postretirement benefits      
Components of Net Periodic Benefit Cost (Income)      
Service cost     0.1
Interest cost $ 2.8 $ 3.7 $ 3.5
Interest cost, location on consolidated statements of operations pfg:OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization pfg:OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization pfg:OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization
Expected return on plan assets $ (36.0) $ (33.2) $ (33.6)
Expected return on plan assets, location on consolidated statements of operations pfg:OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization pfg:OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization pfg:OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization
Amortization of prior service (benefit) cost $ (1.0) $ (1.2) $ (13.9)
Amortization of prior service (benefit) cost, location on consolidated statements of operations pfg:OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization pfg:OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization pfg:OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization
Recognized net actuarial (gain) loss   $ 0.1 $ (1.5)
Recognized net actuarial (gain) loss, location on consolidated statements of operations pfg:OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization pfg:OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization pfg:OperatingExpensesIncludingDeferredAcquisitionCostsCapitalizationAndAmortization
Net periodic benefit cost (income) $ (34.2) $ (30.6) $ (45.4)
Other changes recognized in accumulated other comprehensive (income) loss      
Net actuarial (gain) loss (5.4) (57.5)  
Prior service (benefit) cost (1.0) 1.7  
Amortization of net gain (loss)   (0.1)  
Amortization of prior service benefit (cost) 1.0 1.2  
Total recognized in pre-tax accumulated other comprehensive (income) loss (5.4) (54.7)  
Total recognized in net periodic benefit cost and pre-tax accumulated other comprehensive (income) loss $ (39.6) $ (85.3)