Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Income Tax Disclosure [Abstract]
Income tax benefit rate	35.40%	24.80%	24.90%	13.70%
Effective income tax rate, benefited from certain favorable discrete items			$ 14
Effective income tax rate, favorable tax settlement			7
Effective income tax rate, reserves, statute of limitations and a successful judicial verdict			7
Foreign currency exchange losses related to Venezuelan subsidiaries	0.2	(0.5)	(14.8)	(13.6)
Reduction in unrecognized tax benefits			$ 7