Contingent Liabilities - Additional Information (Detail) Vehicle in Millions, BRL in Millions		1 Months Ended			3 Months Ended
	Jun. 29, 2016 Vehicle Claim	Mar. 31, 2015 USD ($)	Oct. 31, 2014 USD ($)	Oct. 31, 2014 BRL	Mar. 31, 2017 USD ($) Defendant	Jun. 30, 2014 USD ($) Defendant
Loss Contingencies [Line Items]
Number of defendants in antitrust class actions | Defendant					19
Brazilian Subsidiaries
Loss Contingencies [Line Items]
Aggregate assessment for all alleged violations			$ 23,000,000	BRL 72.5
United States District Court for Eastern District of Michigan
Loss Contingencies [Line Items]
Number of pending antitrust class actions | Defendant					15
Expense related settlement agreements		$ 77,000,000				$ 65,000,000
Number of classes of plaintiffs | Defendant						3
Settlement agreements amount		$ 81,000,000
United States District Court for Eastern District of Michigan | Direct purchaser settlement class
Loss Contingencies [Line Items]
Expense related settlement agreements						$ 40,000,000
Settlement agreements amount					$ 35,500,000
United States District Court for Eastern District of Michigan | Auto dealer settlement class
Loss Contingencies [Line Items]
Expense related settlement agreements						6,000,000
United States District Court for Eastern District of Michigan | End-payor settlement class
Loss Contingencies [Line Items]
Expense related settlement agreements						$ 19,000,000
Ontario and Quebec Superior Court
Loss Contingencies [Line Items]
Number of pending antitrust class actions | Defendant					4
Damages from Product Defects
Loss Contingencies [Line Items]
Number of vehicles recalled | Vehicle	1.4
Number of confirmed incidents | Claim	8
Damages from Product Defects | Maximum
Loss Contingencies [Line Items]
Range of possible loss					$ 20,000,000