Debt - Schedule of Debt Obligations (Details) € in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2015 USD ($)	Oct. 30, 2015 USD ($)	Sep. 09, 2015	Jun. 08, 2015 EUR (€)	Jun. 04, 2015 USD ($)	Jun. 04, 2015 EUR (€)	Feb. 13, 2015 USD ($)	Dec. 31, 2014 USD ($)	Aug. 25, 2014 USD ($)
Debt Instrument [Line Items]
ABL Facility, Interest rates	2.64%
Capital leases for equipment, Interest rates	1.40%
ABL Facility, Term	60 months
Capital leases for equipment, Term	70 months
ABL Facility	$ 0.0							$ 0.0
Total debt	5,600.7							608.8
Notes payable	3.5							1.8
Capital leases for equipment	59.1							0.2
Less: current maturities of long-term debt	(135.3)							(1.8)
Less: debt issuance costs	(73.0)							(11.8)
Total long-term debt, net of current maturities	$ 5,272.6							580.3
Convertible senior notes
Debt Instrument [Line Items]
Convertible senior notes, Interest rates	4.50%
Convertible senior notes, Term	60 months
Total debt	$ 52.3							106.8
Less: unamortized discount	$ (4.3)							(14.9)
Senior Notes due 2022
Debt Instrument [Line Items]
Stated Interest Rates	6.50%				6.50%	6.50%
Term	84 months
Total debt	$ 1,600.0				$ 1,600.0			0.0
Senior Notes due 2021
Debt Instrument [Line Items]
Stated Interest Rates	5.75%				5.75%	5.75%
Term	72 months
Total debt	$ 544.4					€ 500.0		0.0
Senior Notes due 2019
Debt Instrument [Line Items]
Stated Interest Rates	7.88%								7.875%
Term	60 months
Total debt	$ 900.0						$ 400.0	500.0	$ 500.0
Plus: unamortized premium	13.2						$ 16.0	0.0
Less: debt issuance costs	$ (43.6)
Senior Notes due 2018
Debt Instrument [Line Items]
Stated Interest Rates	7.25%		7.25%
Term	120 months
Total debt	$ 265.8							0.0
Plus: unamortized fair value adjustment	$ 2.4							0.0
Term loan facility
Debt Instrument [Line Items]
Stated Interest Rates	5.50%
Term	72 months
Total debt	$ 1,600.0							0.0
Less: unamortized discount	$ (31.5)	$ (32.0)						0.0
Senior Debentures due 2034
Debt Instrument [Line Items]
Stated Interest Rates	6.70%		6.70%
Term	360 months
Total debt	$ 300.0							0.0
Plus: unamortized fair value adjustment	$ (101.0)	$ 101.3						0.0
Euro private placement notes due 2020
Debt Instrument [Line Items]
Stated Interest Rates	4.00%			4.00%
Term	84 months
Total debt	$ 13.1			€ 160.0				0.0
Asset financing
Debt Instrument [Line Items]
Stated Interest Rates	1.38%
Term	67 months
Total debt	$ 262.5							0.0
Euro private placement notes
Debt Instrument [Line Items]
Plus: unamortized fair value adjustment	$ 1.4							$ 0.0