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Benefit Plans and Other Postretirement Benefits
 6 Months Ended
Jun. 30, 2020
Retirement Benefits [Abstract]  
Benefit Plans and Other Postretirement Benefits
Components of Net Periodic Benefit Cost (Credit)
Three Months Ended June 30
2020201920202019
(Millions of Dollars)Pension BenefitsPostretirement Health
Care Benefits
Service cost$24  $22  $—  $—  
Interest cost (a)
31  36  5  6  
Expected return on plan assets (a)
(52) (51) (5) (5) 
Amortization of prior service credit (a)
(1) (1) (2) (3) 
Amortization of net loss (a)
25  22  1  1  
Net periodic benefit cost (credit)27  28  (1) (1) 
Credits not recognized due to effects
of regulation 		1  1  1  —  
Net benefit cost (credit) recognized for financial reporting$28  $29  $—  $(1) 
Six Months Ended June 30
2020201920202019
(Millions of Dollars)Pension BenefitsPostretirement Health
Care Benefits
Service cost$45  $43  $1  $1  
Interest cost (a)
68  72  9  11  
Expected return on plan assets (a)
(103) (102) (10) (11) 
Amortization of prior service credit (a)
(2) (2) (4) (5) 
Amortization of net loss (a)
47  44  2  3  
Net periodic benefit cost (credit)55  55  (2) (1) 
Credits not recognized due to effects
of regulation 		2  2  1  1  
Net benefit cost (credit) recognized for financial reporting$57  $57  $(1) $—  
(a)  Components of net periodic cost other than the service cost component are included in the line item “other (expense) income, net” in the consolidated statement of income or capitalized on the consolidated balance sheet as a regulatory asset.
In January 2020, contributions of $150 million were made across four of Xcel Energy’s pension plans. Xcel Energy does not expect additional pension contributions during 2020.