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Basis of Presentation and Accounting Policies Basis of Presentation and Accounting Policies (Details) - Subsequent Event [Member] € in Millions, $ in Millions	1 Months Ended		6 Months Ended
	Jul. 31, 2015 USD ($)	Jul. 31, 2015 EUR (€)	Dec. 31, 2015 USD ($)	Dec. 31, 2015 EUR (€)
French Payroll Tax Credits [Member]
Subsequent Event [Line Items]
Proceeds from sale	$ 130.0	€ 120.1
Forecast [Member] | 7S [Member]
Subsequent Event [Line Items]
Purchase price			$ 144.9	€ 136.5

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