Financial Instruments and Fair Value Measurements - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	3 Months Ended	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2012 Contract	Sep. 30, 2011	Dec. 31, 2011
Derivative [Line Items]
Maximum length of time hedged in Cash Flow Hedge		10 years
Number of interest rate swap contracts		41
Unsettled derivative contract included in accounts payable and accrued expenses	$ 36.8	$ 36.8		$ 28.5
Interest expense reclassified	5.8	11.5
Estimate of additional interest expense reclassified		19.2
Recorded for ineffectiveness	0.6	3.1
Accumulated other comprehensive income (loss)	52.1	52.1		51.7
Impairment Charge related to land		$ 16.1	$ 103.8
Euro [Member]
Derivative [Line Items]
Number of interest rate swap contracts		33
Japanese yen [Member]
Derivative [Line Items]
Number of interest rate swap contracts		5
British sterling pound [Member]
Derivative [Line Items]
Number of interest rate swap contracts		2
U.S. Dollar [Member]
Derivative [Line Items]
Number of interest rate swap contracts		1