Consolidated Statements Of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Mar. 31, 2017
Operating activities
Net income (loss)	$ 4.6	$ (35.2)
Adjustments to reconcile net income (loss) to net cash used by operating activities:
Depreciation and amortization	34.7	25.7
Provision for deferred income taxes	1.6	6.1
Stock-based compensation expense	0.3	0.6
Unrealized (gains) losses on derivative financial instruments	(33.7)	7.8
Amortization of debt issuance costs	0.7	0.8
Other	(0.4)	1.0
Changes in operating assets and liabilities:
Change in accounts receivable	(84.4)	(50.4)
Change in inventories	(60.9)	(66.9)
Change in other assets	(18.4)	(0.6)
Change in accounts payable	44.9	43.8
Change in accrued and other liabilities	76.1	28.7
Net cash used by operating activities	(34.9)	(38.6)
Investing activities
Payments for property, plant and equipment	(30.1)	(62.6)
Other	(0.2)	(0.4)
Net cash used by investing activities	(30.3)	(63.0)
Financing activities
Proceeds from revolving credit facilities	133.9	159.5
Payments on revolving credit facilities	(90.0)	(294.5)
Proceeds from senior secured notes, inclusive of premiums and discounts	0.0	263.8
Net payments on other long-term debt	(3.8)	(2.3)
Debt issuance costs	0.0	(1.8)
Other	0.0	(1.2)
Net cash provided by financing activities	40.1	123.5
Effect of exchange rate differences on cash, cash equivalents and restricted cash	1.9	0.6
Net (decrease) increase in cash, cash equivalents and restricted cash	(23.2)	22.5
Cash, cash equivalents and restricted cash at beginning of period	108.0	55.6
Cash, cash equivalents and restricted cash at end of period	84.8	78.1
Cash and cash equivalents	79.1	74.6
Restricted cash (included in “Prepaid expenses and other current assets”)	$ 5.7	$ 3.5