Derivative Financial Instruments - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2013	Sep. 30, 2012	Sep. 30, 2013	Sep. 30, 2012
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of interest-rate contracts	$ 3,597.0		$ 3,597.0
Notional maturities for interest-rate contracts 2013	217.7		217.7
Notional maturities for interest-rate contracts 2014	1,227.9		1,227.9
Notional maturities for interest-rate contracts 2015	1,146.5		1,146.5
Notional maturities for interest-rate contracts 2016	760.0		760.0
Notional maturities for interest-rate contracts 2017	217.2		217.2
Notional maturities for interest-rate contracts thereafter	27.7		27.7
Maximum length of future cash flow hedges			6 years 7 months 6 days
Recognized gain (loss) on the ineffective portion	0	0.2	0.1	0.4
Accumulated net loss on derivative contracts included in accumulated other comprehensive loss expected to be reclassified to interest expense or cost of sales in the following 12 months			23.8
Foreign-exchange contracts
Derivative Instruments and Hedging Activities Disclosures [Line Items]
Notional amount of interest-rate contracts	$ 451.7		$ 451.7
Foreign-exchange contracts maturity period			Within one year