Debt and Lease Obligations (Senior Notes) (Details) € in Millions, $ in Millions			12 Months Ended
	Mar. 17, 2015 USD ($)	Mar. 17, 2015 EUR (€)	Dec. 31, 2015	Dec. 31, 2014	Nov. 01, 2013 USD ($)	Sep. 11, 2012 USD ($)
Debt Instrument [Line Items]
Domestic subsidiaries unconditional guarantee			100.00%
2022 EUR Senior notes
Debt Instrument [Line Items]
Debt Instrument, Issuance Date			Mar. 17, 2015
Debt Instrument, Face Amount | €		€ 500.0
Debt Instrument, Maturity Date			Mar. 17, 2022
Interest rate (as a percentage)		1.25%	1.25%	0.00%
Price of senior notes, stated as percentage of principal amount		99.336%
Proceeds from Issuance of Debt	$ 526.3	€ 496.7
Redemption price, states as percentage of principal amount			100.00%
Basis points increase over Treasury Rate upon redemption			0.25
2023 Senior notes
Debt Instrument [Line Items]
Debt Instrument, Issuance Date			Nov. 01, 2013
Debt Instrument, Face Amount					$ 300.0
Debt Instrument, Maturity Date			Nov. 15, 2023
Interest rate (as a percentage)			4.00%	4.00%	4.00%
Price of senior notes, stated as percentage of principal amount					99.532%
Redemption price, states as percentage of principal amount			100.00%
Basis points increase over Treasury Rate upon redemption			0.25
2022 Senior notes
Debt Instrument [Line Items]
Debt Instrument, Issuance Date			Sep. 11, 2012
Debt Instrument, Face Amount						$ 500.0
Debt Instrument, Maturity Date			Sep. 15, 2022
Interest rate (as a percentage)			3.50%	3.50%		3.50%
Price of senior notes, stated as percentage of principal amount						99.615%
Redemption price, states as percentage of principal amount			100.00%
Basis points increase over Treasury Rate upon redemption			0.30