XML 47 R31.htm IDEA: XBRL DOCUMENT v3.20.1
Retirement Plans (Tables)
3 Months Ended
Mar. 31, 2020
Retirement Plans [Abstract]  
Net Periodic Pension And OPEB Cost/(Benefit) The components of our net periodic pension and OPEB costs were as follows for the three months ended March 31:

Millions,

Pension

OPEB

for the Three Months Ended March 31,

2020 

2019 

2020 

2019 

Service cost

$

27 

$

22 

$

-

$

-

Interest cost

34 

40 

1 

3 

Expected return on plan assets

(70)

(68)

-

-

Amortization of:

Prior service cost

-

-

(3)

-

Actuarial loss

28 

16 

2 

1 

Net periodic benefit cost

$

19 

$

10 

$

-

$

4