Operations by Reporting Segment - Summary of Net Sales, Cost of Products Sold and Gross Margin Information (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015
Segment Reporting Information [Line Items]
Net sales	$ 1,924	$ 1,962	$ 3,821	$ 3,797
Cost of products sold	(1,620)	(1,672)	(3,229)	(3,256)
Gross profit	304	290	592	541
Inter-segment eliminations [Member]
Segment Reporting Information [Line Items]
Net sales	(66)	(76)	(128)	(152)
Cost of products sold	66	76	128	152
Gross profit	0	0	0	0
Powertrain [Member]
Segment Reporting Information [Line Items]
Net sales	1,172	1,167	2,300	2,305
Cost of products sold	(1,021)	(1,028)	(2,013)	(2,023)
Gross profit	151	139	287	282
Motorparts [Member]
Segment Reporting Information [Line Items]
Net sales	818	871	1,649	1,644
Cost of products sold	(665)	(720)	(1,344)	(1,385)
Gross profit	153	151	305	259
Intersegment eliminations attributable to sales from Powertrain to Motorparts [Member] | Inter-segment eliminations [Member]
Segment Reporting Information [Line Items]
Net sales	55	66	109	133
Intersegment eliminations attributable to sales from Motorparts to Powertrain [Member] | Inter-segment eliminations [Member]
Segment Reporting Information [Line Items]
Net sales	$ 11	$ 10	$ 19	$ 19