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Employee Benefit Plans
 3 Months Ended
Mar. 31, 2020
Compensation And Retirement Disclosure [Abstract]  
Employee Benefit Plans

9. EMPLOYEE BENEFIT PLANS

Components of net periodic benefit cost recorded by DESC were as follows:

 

(millions)

 

Pension Benefits

 

 

Other Postretirement Benefits

 

Three Months Ended March 31,

 

2020

 

 

2019

 

 

2020

 

 

2019

 

Service cost

 

$

3

 

 

$

4

 

 

$

1

 

 

$

1

 

Interest cost

 

 

6

 

 

 

8

 

 

 

2

 

 

 

2

 

Expected return on assets

 

 

(11

)

 

 

(10

)

 

 

—

 

 

 

—

 

Amortization of actuarial losses

 

 

2

 

 

 

4

 

 

 

—

 

 

 

—

 

Net periodic benefit cost

 

$

—

 

 

$

6

 

 

$

3

 

 

$

3

 

 

No significant contribution to the pension trust is expected for the remainder of 2020 based on current market conditions and assumptions, nor is a limitation on benefit payments expected to apply. DESC recovers current pension costs through either a rate rider that may be adjusted annually for retail electric operations or through cost of service rates for gas operations.