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Pension and Postretirement Health Care (Tables)
3 Months Ended
Mar. 31, 2021
Retirement Benefits [Abstract]  
Net Periodic Pension Expense (Benefit)
The following table sets forth the net periodic pension and postretirement benefit expense for Northern Trust’s U.S. Qualified Plan, Non-U.S. Pension Plans, U.S. Non-Qualified Plan, and postretirement health care plan for the three months ended March 31, 2021 and 2020.
TABLE 67: NET PERIODIC PENSION EXPENSE (BENEFIT)
U.S. QUALIFIED PLANTHREE MONTHS ENDED MARCH 31,
(In Millions)20212020
Service Cost$13.2 $11.8 
Interest Cost9.8 10.8 
Expected Return on Plan Assets(20.1)(19.2)
Amortization
Net Actuarial Loss9.4 8.8 
Prior Service Cost(0.1)(0.1)
Net Periodic Pension Expense$12.2 $12.1 
NON-U.S. PENSION PLANSTHREE MONTHS ENDED MARCH 31,
(In Millions)20212020
Service Cost$0.5 $0.5 
Interest Cost0.6 0.7 
Expected Return on Plan Assets(0.6)(0.7)
Settlement Expense0.2 0.2 
Amortization
Net Actuarial Loss0.3 0.3 
Prior Service Cost — 
Net Periodic Pension Expense$1.0 $1.0 
U.S. NON-QUALIFIED PLANTHREE MONTHS ENDED MARCH 31,
(In Millions)20212020
Service Cost$1.3 $1.1 
Interest Cost0.9 1.2 
Amortization
Net Actuarial Loss 2.1 1.8 
Prior Service Cost — 
Net Periodic Pension Expense$4.3 $4.1 
POSTRETIREMENT HEALTH CARE PLANTHREE MONTHS ENDED MARCH 31,
(In Millions)20212020
Service Cost$ $— 
Interest Cost0.1 0.2 
Amortization
Net Actuarial (Gain)(0.1)(0.2)
Prior Service Cost(0.2)— 
Net Periodic Postretirement Expense$(0.2)$—