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Other Income (Details) - USD ($)
$ in Millions
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Other Income [Abstract]    
Rental income $ 31 $ 29
Net gain on non-operating asset dispositions. 11 4
Net periodic pension and OPEB costs 8 8
Interest Income 6 9
Interest income due to employment tax refund   27
Non-operating environmental costs and other (3)  
Total $ 53 $ 77