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Other Income
3 Months Ended
Mar. 31, 2021
Other Income [Abstract]  
Other Income 6. Other Income

Other income included the following:

Millions,

for the Three Months Ended March 31,

2021

2020 

Rental income

$

33 

$

31 

Gain on non-operating asset dispositions

9 

11 

Net periodic pension and OPEB costs

6 

8 

Interest income

1 

6 

Non-operating environmental costs and other

2 

(3)

Total

$

51 

$

53