Income Taxes - Additional Information (Detail) In Millions, unless otherwise specified	3 Months Ended						9 Months Ended			9 Months Ended			3 Months Ended			9 Months Ended	12 Months Ended		3 Months Ended					9 Months Ended		12 Months Ended				9 Months Ended			9 Months Ended
	Sep. 30, 2013 USD ($)	Sep. 30, 2013 EUR (€)	Mar. 31, 2013 USD ($)	Sep. 30, 2012 USD ($)	Sep. 30, 2013 Spanish tax settlement [Member]	Sep. 30, 2012 Spanish tax settlement [Member]	Sep. 30, 2013 Spanish tax settlement [Member]	Sep. 30, 2012 Spanish tax settlement [Member]	Sep. 30, 2013 Spanish tax withholding [Member] USD ($)	Sep. 30, 2012 Corporate restructuring [Member] USD ($)	Sep. 30, 2013 Other liabilities [Member] USD ($)	Sep. 30, 2013 Other current liabilities [Member] USD ($)	Sep. 30, 2012 2004-2010 [Member] USD ($)	Mar. 31, 2013 2004-2010 [Member] Spanish tax settlement [Member] USD ($)	Mar. 31, 2013 2004-2010 [Member] Spanish tax settlement [Member] EUR (€)	Sep. 30, 2012 2004-2010 [Member] Spanish tax settlement [Member] USD ($)	Dec. 31, 2012 2004-2010 [Member] Spanish tax settlement [Member] USD ($)	Dec. 31, 2012 2004-2010 [Member] Spanish tax settlement [Member] EUR (€)	Mar. 31, 2013 2002-2003 [Member] USD ($)	Sep. 30, 2013 2002-2003 [Member] USD ($)	Sep. 30, 2013 2002-2003 [Member] EUR (€)	Sep. 30, 2013 2002-2003 [Member] Spanish tax settlement [Member] USD ($)	Sep. 30, 2013 2002-2003 [Member] Spanish tax settlement [Member] EUR (€)	Sep. 30, 2013 2002-2003 [Member] Minimum [Member]	Sep. 30, 2013 2002-2003 [Member] Maximum [Member]	Dec. 31, 2012 1995-2001 [Member] USD ($)	Sep. 30, 2013 1995-2001 [Member] USD ($)	Sep. 30, 2013 1995-2001 [Member] EUR (€)	Dec. 31, 2012 1995-2001 [Member] EUR (€)	Sep. 30, 2013 1995-2001 [Member] Minimum [Member]	Sep. 30, 2013 1995-2001 [Member] Maximum [Member]	Sep. 30, 2013 2002-2011 [Member] Spanish tax settlement [Member] USD ($)	Sep. 30, 2013 2007-2012 [Member] Minimum [Member]	Sep. 30, 2013 2007-2012 [Member] Maximum [Member]
Income Taxes [Line Items]
Unrecognized tax benefits that would impact effective tax rate											$ 25.3	$ 4.9
Reduction in accrual for interest and penalties	6.8
Accrued interest and penalties											0.5	0.2
Payments pursuant to Spanish tax settlement														1.9	1.5	105.5	105.5	84.0
Overall Spanish tax settlement				72.4									56.0
Increase in liabilities, uncertain tax positions				16.4
Income tax examination, years under examination																								2002	2003					1995	2001		2007	2012
Assessment imposed	23.3	17.7																		2.4	1.8	28.6	22.4			12.8	6.0	4.4	9.8
Income tax payment related to tax assessment subsequent to current period	4.0	3.1
Bank guarantees needed to be posted to proceed with tax appeals																				2.4	1.8						10.3	7.6
Charges associated with issues in 2002-2003 cases																			9.3
Partial offset adjustment to prior accruals			3.1
After tax expense due to the recognition of out-of-period tax adjustments																										12
Provision for uncertain tax positions	30.9								3.7																		4.3	3.2				7.2
Effective tax rate					26.10%	86.60%	27.40%	47.60%
Additional tax provision recorded																				6.2
Income tax charge associated withholding tax cases										$ 10.6