Income Taxes - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended			3 Months Ended	9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012	May 31, 2012 SPAIN	Sep. 30, 2013 Reduction in Taxes	Sep. 30, 2013 Reduction in Taxes	Sep. 30, 2013 Minimum	Sep. 30, 2013 Maximum
Income Taxes [Line Items]
Federal statutory income tax rate	23.20%	27.30%	22.80%	24.70%
Reduction in unrecognized tax benefits							$ 5.9
Reduction in income tax expense (benefit)	(25.6)	(36.9)	(80.9)	(90.5)		(4.2)	(4.7)
Tax benefit from final foreign audit settlement and the expiration of foreign jurisdiction				6
Court judgment, tax payment to foreign tax authorities					20
Income tax indemnification				18
Decrease in reasonable unrecognized tax benefits								$ 7	$ 12