Acquisitions,Divestitures and Disposal Group Held for Sale - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended			3 Months Ended	12 Months Ended	10 Months Ended
	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Mar. 31, 2012	Dec. 31, 2011	Jun. 30, 2013	Sep. 30, 2013
Business Acquisition [Line Items]
Cash proceeds from divestiture of business		$ 9	$ 1	$ 8
Impairment of long-lived assets				2
Sales		0	0	34
Proceeds in escrow			10
Loss on disposal group held for sale	80	80
Axle Differential and Brake Systems [Member]
Business Acquisition [Line Items]
Cash proceeds from divestiture of business				8
Impairment of long-lived assets					2
Sales				32
Structural Products [Member]
Business Acquisition [Line Items]
Cash proceeds from divestiture of business		9				134
Charge to discontinued operations		1
Operations In Venezuela [Member]
Business Acquisition [Line Items]
Loss on disposal group held for sale		80
Fallbrook [Member]
Business Acquisition [Line Items]
Business acquisition, amount paid			8	12			20
Business acquisition, price allocated to indefinite-lived intangible assets								20
Fallbrook [Member] | Off-Highway Segment [Member]
Business Acquisition [Line Items]
Business acquisition, price allocated to indefinite-lived intangible assets								12
Fallbrook [Member] | Light Vehicle Segment [Member]
Business Acquisition [Line Items]
Business acquisition, price allocated to indefinite-lived intangible assets								$ 8