XML 131 R116.htm IDEA: XBRL DOCUMENT v3.22.0.1
Employee and Agent Benefits - Supplemental Information, Qualified and Nonqualified Plans (Details) - Pension benefits - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Amount recognized in statement of financial position      
Amount recognized in other liabilities $ (633.6) $ (836.7)  
Total assets (liabilities) recognized in statement of financial position (633.6) (836.7)  
Amount recognized in accumulated other comprehensive (income) loss      
Total net actuarial (gain) loss 588.0 760.0  
Prior service (benefit) cost (104.2) (121.0)  
Pre-tax accumulated other comprehensive (income) loss 483.8 639.0  
Components of Net Periodic Benefit Cost (Income)      
Service cost 83.2 72.7 $ 66.0
Interest cost 103.3 117.3 126.5
Expected return on plan assets (182.7) (156.8) (148.8)
Amortization of prior service (benefit) cost (16.8) (16.8) (11.3)
Recognized net actuarial (gain) loss 70.2 75.4 70.1
Net periodic benefit cost (income) 57.2 91.8 $ 102.5
Other changes recognized in accumulated other comprehensive (income) loss      
Net actuarial (gain) loss (101.8) 97.9  
Amortization of gain (loss) (70.2) (75.4)  
Amortization of prior service benefit (cost) 16.8 16.8  
Total recognized in pre-tax accumulated other comprehensive (income) loss (155.2) 39.3  
Total recognized in net periodic benefit cost and pre-tax accumulated other comprehensive (income) loss (98.0) 131.1  
Qualified benefit plans      
Amount recognized in statement of financial position      
Amount recognized in other liabilities (108.4) (294.9)  
Total assets (liabilities) recognized in statement of financial position (108.4) (294.9)  
Amount recognized in accumulated other comprehensive (income) loss      
Total net actuarial (gain) loss 415.5 563.5  
Prior service (benefit) cost (85.2) (97.8)  
Pre-tax accumulated other comprehensive (income) loss 330.3 465.7  
Components of Net Periodic Benefit Cost (Income)      
Service cost 76.2 66.1  
Interest cost 90.1 101.2  
Expected return on plan assets (182.7) (156.8)  
Amortization of prior service (benefit) cost (12.6) (12.6)  
Recognized net actuarial (gain) loss 52.8 59.9  
Net periodic benefit cost (income) 23.8 57.8  
Other changes recognized in accumulated other comprehensive (income) loss      
Net actuarial (gain) loss (95.3) 55.7  
Amortization of gain (loss) (52.8) (59.8)  
Amortization of prior service benefit (cost) 12.6 12.6  
Total recognized in pre-tax accumulated other comprehensive (income) loss (135.5) 8.5  
Total recognized in net periodic benefit cost and pre-tax accumulated other comprehensive (income) loss (111.7) 66.3  
Nonqualified benefit plans      
Amount recognized in statement of financial position      
Amount recognized in other liabilities (525.2) (541.8)  
Total assets (liabilities) recognized in statement of financial position (525.2) (541.8)  
Amount recognized in accumulated other comprehensive (income) loss      
Total net actuarial (gain) loss 172.5 196.5  
Prior service (benefit) cost (19.0) (23.2)  
Pre-tax accumulated other comprehensive (income) loss 153.5 173.3  
Components of Net Periodic Benefit Cost (Income)      
Service cost 7.0 6.6  
Interest cost 13.2 16.1  
Amortization of prior service (benefit) cost (4.2) (4.2)  
Recognized net actuarial (gain) loss 17.4 15.5  
Net periodic benefit cost (income) 33.4 34.0  
Other changes recognized in accumulated other comprehensive (income) loss      
Net actuarial (gain) loss (6.5) 42.2  
Amortization of gain (loss) (17.4) (15.6)  
Amortization of prior service benefit (cost) 4.2 4.2  
Total recognized in pre-tax accumulated other comprehensive (income) loss (19.7) 30.8  
Total recognized in net periodic benefit cost and pre-tax accumulated other comprehensive (income) loss $ 13.7 $ 64.8