Restructuring Narrative (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2020	Mar. 31, 2019	Dec. 31, 2019
Restructuring Cost and Reserve [Line Items]
PreTaxRestructuringCharges	$ 41
Restructuring	$ 43	$ 3	$ 3
Document Period End Date	Mar. 31, 2020
Asset Impairment Charges	$ 12	3
Restructuring, Cash Expenditures	33	9
Cost of Sales [Member] | Fair Value, Measurements, Nonrecurring
Restructuring Cost and Reserve [Line Items]
Asset Impairment Charges	$ 3	$ 3