Income Taxes - Additional Information (Detail) (USD $)	0 Months Ended	3 Months Ended	12 Months Ended
	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012	Jul. 31, 2013
U.S. federal statutory rate			35.00%	35.00%	35.00%
Release of valuation allowances		$ 179,000,000
Loss on disposal group held for sale		80,000,000	80,000,000
Recognized tax expense (benefit) related to future income taxes and non-us withholding taxes			3,000,000	8,000,000	7,000,000
Withholding tax related to the actual transfer of funds to the U.S. and between foreign subsidiaries			7,000,000	13,000,000	10,000,000
Intercompany loan obligations	574,000,000	574,000,000	574,000,000
Intercompany loan obligations to parent considered permanently invested	36,000,000	36,000,000	36,000,000
Deferred tax asset valuation allowance reasonably likely to reverse in the next twelve months	500,000,000	500,000,000	500,000,000
Capital loss carryforwards	55,000,000	55,000,000	55,000,000	65,000,000
Capital loss carryforward valuation allowance	55,000,000	55,000,000	55,000,000
Other tax credit carryforwards	60,000,000	60,000,000	60,000,000
Other tax credit carryforward, valuation allowance	57,000,000	57,000,000	57,000,000
Net operating loss related to settlement of stock awards	31,000,000	31,000,000	31,000,000
Interest accrued on uncertain tax positions	6,000,000	6,000,000	6,000,000	5,000,000
Expected decrease in unrecognized tax benefits in next twelve months	13,000,000
Unrecognized tax benefit that would impact effective tax rate	61,000,000	61,000,000	61,000,000
Minimum [Member]
Other credit carryforward periods	10 years
Maximum [Member]
Other credit carryforward periods	20 years
Internal Revenue Service (IRS) [Member]
Operating loss carryforwards	1,235,000,000	1,235,000,000	1,235,000,000
Operating loss carryforwards subjected to limitation, annual limit	84,000,000	84,000,000	84,000,000
U.S operating loss carryforwards subject to limitation	677,000,000	677,000,000	677,000,000
ITALY
Accrued tax reserve on uncertain tax positions			2,000,000	6,000,000	4,000,000
UNITED STATES
Release of valuation allowances			179,000,000
CANADA
Release of valuation allowances					34,000,000
Income tax expense reduction					34,000,000
UNITED KINGDOM
Release of valuation allowances					20,000,000
Income tax expense reduction					20,000,000
Foreign Tax Authority
Income tax expense reduction				7,000,000
Senior Notes Sold In 2013 [Member]
Senior notes issued						$ 750,000,000