Debt - Additional Information (Details) $ / shares in Units, € in Millions			1 Months Ended		12 Months Ended
	Oct. 30, 2015 USD ($)	Sep. 09, 2015 USD ($) indexer	Dec. 31, 2015 USD ($) $ / shares	Jul. 31, 2015 EUR (€)	Dec. 31, 2015 USD ($) day $ / shares shares	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]
Long-term debt			$ 5,600,700,000		$ 5,600,700,000					$ 608,800,000
Total unamortized debt issuance costs			73,000,000		$ 73,000,000					11,800,000
Convertible debt, redemption terms, redemption price as percent of principal amount to be redeemed					100.00%
Long-term Debt, Redemptions in Period, Amount | €				€ 223.0
Line of credit facility, amount drawn			$ 0		$ 0					0
Debt Conversion, Converted Instrument, Shares Issued | shares					3,315,705
Debt Conversion, Converted Instrument, Amount					$ 54,500,000
Gain (Loss) On Conversion Of Debt					$ (10,000,000)
Convertible debt, conversion rate, shares per $1000 in principal amount					60.8467
Convertible debt, conversion rate, principal amount increment					$ 1,000
Debt instrument, convertible, conversion price (in usd per share) | $ / shares			$ 16.43		$ 16.43
Convertible debt, redemption terms, common stock market price as a percent of the conversion price					130.00%
Threshold trading days | day					20
Threshold consecutive trading days					30 days
Convertible debt, redemption terms, make whole premium payment, discount rate					4.50%
Long-term Debt
Debt Instrument [Line Items]
Debt Conversion, Converted Instrument, Amount					$ 46,800,000
Equity
Debt Instrument [Line Items]
Debt Conversion, Converted Instrument, Amount					55,600,000
Multi Currency Revolving Credit Facility
Debt Instrument [Line Items]
Debt Instrument, Increase (Decrease) in Basis Spread on Variable Rate	(0.25%)
ABL Facility
Debt Instrument [Line Items]
Total unamortized debt issuance costs			$ 9,600,000		9,600,000
Secured revolving loan credit agreement amount	$ 1,000,000,000
Line of credit facility, Capacity Available for Specific Purpose Other than for Trade Purchases	350,000,000
Line of credit facility, Capacity Available for Swing Line Loans	$ 50,000,000
Line of credit facility, borrowing base			932,900,000		932,900,000
Line of Credit Facility, Remaining Borrowing Capacity			692,300,000		692,300,000
Line of credit facility, amount drawn			240,600,000		240,600,000
Line Of Credit Facility, Borrowing Base, Maximum Portion Attributable To Equipment And Rolling Stock, Percentage	20.00%
Term loan facility
Debt Instrument [Line Items]
Total unamortized debt issuance costs			28,200,000		$ 28,200,000
Secured revolving loan credit agreement amount	$ 1,600,000,000
Line of credit facility, Periodic Payment, Principal, Percentage	0.25%
Line of credit facility, Prepayment as Percentage of Excess Cash Flow	50.00%
Term loan facility | LIBOR
Debt Instrument [Line Items]
Percent added to reference rate in effect from time to time to set the interest rate	4.50%
Term loan facility | Base Rate
Debt Instrument [Line Items]
Percent added to reference rate in effect from time to time to set the interest rate					3.50%
Term Loan Facility, Scenario 1
Debt Instrument [Line Items]
Line of credit facility, Prepayment as Percentage of Excess Cash Flow	25.00%
Term Loan Facility, Scenario 2
Debt Instrument [Line Items]
Line of credit facility, Prepayment as Percentage of Excess Cash Flow	0.00%
Convertible senior notes
Debt Instrument [Line Items]
Long-term debt			52,300,000		$ 52,300,000					106,800,000
Debt Instrument, Unamortized Discount			4,300,000		4,300,000					14,900,000
Convertible senior notes | Other long-term assets
Debt Instrument [Line Items]
Total unamortized debt issuance costs			$ 1,200,000		$ 1,200,000
Minimum | ABL Facility | LIBOR
Debt Instrument [Line Items]
Percent added to reference rate in effect from time to time to set the interest rate	1.50%
Minimum | ABL Facility | Base Rate
Debt Instrument [Line Items]
Percent added to reference rate in effect from time to time to set the interest rate	0.50%
Minimum | Term Loan Facility, Scenario 1
Debt Instrument [Line Items]
Debt Instrument, Covenant Compliance, Leverage Ratio Required (less than or equal to)	2.50
Maximum
Debt Instrument [Line Items]
Fixed charge coverage ratio (not less than)			1.00		1.00
Maximum | ABL Facility | LIBOR
Debt Instrument [Line Items]
Percent added to reference rate in effect from time to time to set the interest rate	2.00%
Maximum | ABL Facility | Base Rate
Debt Instrument [Line Items]
Percent added to reference rate in effect from time to time to set the interest rate	1.00%
Maximum | Term Loan Facility, Scenario 1
Debt Instrument [Line Items]
Debt Instrument, Covenant Compliance, Leverage Ratio Required (less than or equal to)	3.00
Maximum | Term Loan Facility, Scenario 2
Debt Instrument [Line Items]
Debt Instrument, Covenant Compliance, Leverage Ratio Required (less than or equal to)	2.50
Senior Notes due 2019
Debt Instrument [Line Items]
Long-term debt			$ 900,000,000		$ 900,000,000				$ 400,000,000	500,000,000	$ 500,000,000
Debt instrument, interest rate, stated percentage			7.88%		7.88%						7.875%
Senior notes									$ 900,000,000
Debt Instrument, Unamortized Premium, Percentage									104.00%
Debt Instrument, Unamortized Premium			$ 13,200,000		$ 13,200,000				$ 16,000,000	0
Total unamortized debt issuance costs			43,600,000		$ 43,600,000
Convertible debt, redemption terms, redemption price as percent of principal amount to be redeemed					100.00%
Percent of principal amount available to be redeemed with proceeds from equity offerings					40.00%
Redemption price with proceeds from equity offerings (as a percent)					107.875%
Minimum amount of debt outstanding, percentage					60.00%
Debt Instrument, Term					60 months
Senior Notes due 2022
Debt Instrument [Line Items]
Long-term debt			$ 1,600,000,000		$ 1,600,000,000		$ 1,600,000,000			0
Debt instrument, interest rate, stated percentage			6.50%		6.50%		6.50%	6.50%
Convertible debt, redemption terms, redemption price as percent of principal amount to be redeemed					100.00%
Percent of principal amount available to be redeemed with proceeds from equity offerings					40.00%
Redemption price with proceeds from equity offerings (as a percent)					106.50%
Minimum amount of debt outstanding, percentage					60.00%
Debt Instrument, Term					84 months
Senior Notes due 2021
Debt Instrument [Line Items]
Long-term debt			$ 544,400,000		$ 544,400,000			€ 500.0		0
Debt instrument, interest rate, stated percentage			5.75%		5.75%		5.75%	5.75%
Redemption price with proceeds from equity offerings (as a percent)					105.75%
Debt Instrument, Term					72 months
Senior Notes due 2018
Debt Instrument [Line Items]
Long-term debt			$ 265,800,000		$ 265,800,000					0
Debt instrument, interest rate, stated percentage		7.25%	7.25%		7.25%
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt		$ 425,000,000
Debt Instrument, Redemption Price, Premium, Percentage		50.00%
Debt Instrument, Redemption, Number Of Indexers To Have Below Investment Grade | indexer		2
Redemption price (as a percent)		101.00%	101.00%
Long-term Debt, Redemptions in Period, Amount			$ 159,200,000
Interest Costs Incurred			5,100,000
Debt Instrument, Fair Value Adjustment			2,400,000		$ 2,400,000					0
Debt Instrument, Term					120 months
Senior Debentures due 2034
Debt Instrument [Line Items]
Long-term debt			$ 300,000,000		$ 300,000,000					0
Debt instrument, interest rate, stated percentage		6.70%	6.70%		6.70%
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Noncurrent Liabilities, Long-term Debt		$ 300,000,000
Debt Instrument, Redemption Price, Premium, Percentage		35.00%
Debt Instrument, Fair Value Adjustment	$ 101,300,000		$ (101,000,000)		$ (101,000,000)					0
Debt Instrument, Interest Rate, Effective Percentage	10.96%
Debt Instrument, Term					360 months
Euro Private Placement Notes due 2019
Debt Instrument [Line Items]
Long-term debt | €						€ 75.0
Debt instrument, interest rate, stated percentage						3.80%
Convertible debt, redemption terms, redemption price as percent of principal amount to be redeemed					100.00%
Debt Instrument, Notice Period Required for Change of Control					30 days
Debt Instrument, Minimum Period After Publication of Early Redemption Notice for Shareholders to Exercise Options					15 days
Debt Instrument, Covenant Compliance, Leverage Ratio Required (less than or equal to)			3.50		3.50
Ratio of Indebtedness to Net Capital (less than or equal to)			2.00		2.00
Euro Private Placement Notes due 2019 | Minimum
Debt Instrument [Line Items]
Debt Instrument, Notice Period Required for Early Redemption					25 days
Euro private placement notes due 2020
Debt Instrument [Line Items]
Long-term debt			$ 13,100,000		$ 13,100,000	€ 160.0				0
Debt instrument, interest rate, stated percentage			4.00%		4.00%	4.00%
Debt Instrument, Term					84 months
Asset financing
Debt Instrument [Line Items]
Long-term debt			$ 262,500,000		$ 262,500,000					0
Debt instrument, interest rate, stated percentage			1.38%		1.38%
Debt Instrument, Term					67 months
Asset financing | Minimum | Unsecured Debt
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage			0.269%		0.269%
Debt Instrument, Term					5 years
Asset financing | Maximum | Unsecured Debt
Debt Instrument [Line Items]
Debt instrument, interest rate, stated percentage			5.50%		5.50%
Debt Instrument, Term					10 years
Term loan facility
Debt Instrument [Line Items]
Long-term debt			$ 1,600,000,000		$ 1,600,000,000					0
Debt instrument, interest rate, stated percentage			5.50%		5.50%
Debt Instrument, Term					72 months
Debt Instrument, Unamortized Discount	$ 32,000,000		$ 31,500,000		$ 31,500,000					$ 0