Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	12 Months Ended								12 Months Ended
	Dec. 31, 2012	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2012 Minimum	Dec. 31, 2012 Maximum	Dec. 31, 2012 Reasonably Possible to be Released in Twelve Month	Dec. 31, 2012 International To US Parent	Dec. 31, 2012 International Foreign Denominated	Dec. 31, 2012 Foreign Tax Authority	Dec. 31, 2012 CANADA	Dec. 31, 2012 CANADA Valuation Allowance	Dec. 31, 2012 UNITED KINGDOM	Dec. 31, 2012 UNITED KINGDOM Valuation Allowance	Dec. 31, 2011 Mexico and Spain	Dec. 31, 2010 BRAZIL	Dec. 31, 2012 ITALY	Dec. 31, 2012 U.S. Operating Loss Carryforwards not Subject to Limitation	Dec. 31, 2012 U.S. Voluntary Employee Beneficiary Association (VEBA) Plan Operating Loss Carryforwards not Subject to Limitation	Dec. 31, 2008 U.S. Voluntary Employee Beneficiary Association (VEBA) Plan Operating Loss Carryforwards not Subject to Limitation
Income Taxes [Line Items]
Reversal of accrued uncertain tax positions related to the 1999 through 2002 and 2003 through 2005				$ 9
Bankruptcy claim related payments				(75)
Accrued tax reserve on uncertain tax positions																	4
Income tax expense reduction			12							6		34		20
Tax expense charged to OCI				5
Recognized tax expense (benefit) related to future income taxes and non-us withholding taxes		7		(3)
Withholding tax related to the actual transfer of funds to the U.S. and between foreign subsidiaries		10	17	8
Inter company loan obligation								853	45
Income tax expense (benefit)	54										(34)		(20)		(8)
Change in deferred tax asset valuation allowance																(16)
Deferred tax asset valuation allowance	1,184	1,184	1,334				800
Net operating loss related to settlement of stock awards	27	27
Capital loss carryforwards	66	66	30
Deferred tax assets other credit carryforword	83	83
Other credit carryforwards					10 years	20 years
U.S operating loss carryforwards subject to limitation	736	736
Operating loss carryforwards subjected to limitation, annual limit	84	84
Employee benefit obligations deductible cost																			733	733
Operating loss carryforwards																		1,199
Interest accrued on uncertain tax positions	6	6	6
Expected decrease in unrecognized tax benefits in next twelve months		40
Unrecognized tax benefit that would impact effective tax rate	$ 53	$ 53