XML 36 R26.htm IDEA: XBRL DOCUMENT v3.21.2
Benefit Plans and Other Postretirement Benefits (Tables)
 6 Months Ended
Jun. 30, 2021
Retirement Benefits [Abstract]  
Components of Net Periodic Benefit Cost (Credit)
Components of Net Periodic Benefit Cost (Credit)
 Three Months Ended June 30
 2021202020212020
(Millions of Dollars)Pension BenefitsPostretirement Health
Care Benefits
Service cost$8 $8 $— $— 
Interest cost (a)
9 11 3 3 
Expected return on plan assets (a)
(18)(18)(4)(4)
Amortization of prior service credit (a)
— (1)(1)(1)
Amortization of net loss (a)
8 8 1 — 
Net periodic benefit cost (credit)7 8 (1)(2)
Effects of regulation2 — — 1 
Net benefit cost (credit) recognized for financial reporting$9 $8 $(1)$(1)
Six Months Ended June 30
2021202020212020
(Millions of Dollars)Pension BenefitsPostretirement Health
Care Benefits
Service cost$16 $15 $— $— 
Interest cost (a)
19 23 6 6 
Expected return on plan assets (a)
(36)(35)(8)(9)
Amortization of prior service credit (a)
— (1)(2)(2)
Amortization of net loss (a)
16 15 2 2 
Net periodic benefit cost (credit)15 17 (2)(3)
Effects of regulation2 — 1 1 
Net benefit cost (credit) recognized for financial reporting$17 $17 $(1)$(2)
(a)     The components of net periodic cost other than the service cost component are included in the line item “Other income, net” in the consolidated statements of income or capitalized on the consolidated balance sheets as a regulatory asset.
 [1]
[1] The components of net periodic cost other than the service cost component are included in the line item “Other income, net” in the consolidated statements of income or capitalized on the consolidated balance sheets as a regulatory asset.