Other (Income) Expense (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Other Income and Expenses [Abstract]
Other - net	$ (3)	$ 2	$ (35)	$ 9
Gain (Loss) on Sale and Revaluation of Assets	64	15	64	30
Other (Income) Expense - Net	(67)	(13)	(99)	(21)
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component	$ (8)	$ (6)	$ (21)	$ (8)