Contractual interest rate for funds borrowed, under the debt agreement.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Amount of gain (loss) from the ineffectiveness of the hedge.

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The cash inflow associated with the amount received from entity's first offering of stock to the public.

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Debt - Additional Information (Detail) In Millions, unless otherwise specified	12 Months Ended			1 Months Ended		0 Months Ended	1 Months Ended
	Dec. 31, 2013 USD ($)	Dec. 31, 2012 USD ($)	Dec. 31, 2011 USD ($)	Feb. 17, 2012 Senior Notes 6.375% Due 2022 [Member] USD ($)	Dec. 31, 2013 Senior Notes 6.375% Due 2022 [Member] USD ($)	Mar. 09, 2012 2012 Term Loan [Member] USD ($)	Mar. 09, 2012 2012 Term Loan [Member] USD ($)	Dec. 31, 2013 5.750% Senior Notes due 2020 [Member] EUR (€)
Debt Instrument [Line Items]
Unsecured senior notes, value of offering				$ 200.0	$ 150.0			€ 200.0
Net proceeds, after underwriting discount				196.5
Unsecured senior notes, interest rate				6.375%				5.75%
Debt instrument, maturity date				Feb. 15, 2022		Mar. 09, 2016
Paid off term loan						100	100
Hedge ineffectiveness and income statement effect in period	0	0	0
Other assets, collateral	$ 5.0	$ 6.6