Restructuring Charges - Narrative (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 211	$ 129
Severance costs	177	112
Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	177	112
Scenario, Forecast [Member] | Employee Severance [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring activities anticipated for 2017			$ 100
Hydraulics [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	67	31
Aerospace [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	4	5
Vehicle [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	35	34
Corporate, Non-Segment [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ 12	$ 18