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Debt (Details) - EUR (€)		9 Months Ended
	Sep. 11, 2015	Sep. 30, 2015
Senior notes | Notes due September 2022
Debt Instrument [Line Items]
Aggregate principal amount	€ 400,000,000
Stated interest rate	1.875%
Net proceeds from the Notes	€ 397,400,000
Discounted issue price (as a percent)	99.753%
Effective interest rate	1.913%
Line of credit | Five Year Credit Agreement
Debt Instrument [Line Items]
Credit agreement term		5 years

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