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Acquisitions and Divestitures - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended							3 Months Ended	12 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013 Fallbrook [Member]	Dec. 31, 2012 Fallbrook [Member]	Sep. 10, 2012 Fallbrook [Member]	Jun. 30, 2013 Fallbrook [Member] Off-Highway	Jun. 30, 2013 Fallbrook [Member] LVD	Mar. 31, 2012 Axle Differential and Brake Systems [Member]	Dec. 31, 2012 Axle Differential and Brake Systems [Member]
Business Acquisitions and Investments in Equity Affiliates [Line Items]
Business acquisition, purchase price							$ 20
Business acquisition, cash paid					8	5	7
Business acquisition, purchase price allocated to non-amortizable intangible assets					20			12	8
Proceeds in escrow	12		12
Cash proceeds from divestiture of business											8
Asset impairment for sales of business based on our current estimate of the expected sales price				2						2
Sales of divested business											$ 32

The loss (gain) resulting from the write-down of the carrying value of assets classified as a disposal group, but one which is not further classified as a discontinued operation, to fair value less cost to sell. A (gain) results from a subsequent increase in fair value less cost to sell, but not in excess of the cumulative loss previously recognized. For example, the write-down of a disposal group subject to a plan of sale, which was not sold in the current period, to its held-for-sale value. The loss (gain) is included in income from continuing operations before income taxes in the income statement.

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