Other (Income) Expense (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2020	Mar. 31, 2019
Other Income and Expenses [Abstract]
Other - net	$ (32)	$ 7
Gain (Loss) on Sale and Revaluation of Assets	0	15
Other (Income) Expense - Net	(32)	(8)
Net Periodic Defined Benefits Expense (Reversal of Expense), Excluding Service Cost Component	$ (13)	$ (2)