Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2018	Apr. 01, 2017
Cash flows from operating activities of continuing operations:
Net income (loss)	$ 362.0	$ (34.4)
Net income (loss) from discontinued operations, net of income taxes	357.4	(24.2)
Net income (loss) from continuing operations	4.6	(10.2)
Adjustments to reconcile net income (loss) from continuing operations to cash flows provided by operating activities:
Depreciation & amortization	47.4	43.6
Amortization of financing fees	0.9	0.3
Amortization of senior notes premium	(0.4)	(1.6)
Share-based compensation expense	3.4	4.0
(Benefit) provision for deferred income taxes	(0.2)	1.8
Commodity hedging loss (gain), net	0.3	(1.9)
Gain on extinguishment of debt	(7.1)
Loss on disposal of property, plant & equipment, net	1.3	1.3
Other non-cash items	0.1	(1.8)
Change in operating assets and liabilities, net of acquisitions:
Accounts receivable	(12.7)	0.1
Inventories	(9.1)	(8.4)
Prepaid expenses and other current assets	(4.3)	(6.5)
Other assets	1.0	(0.1)
Accounts payable and accrued liabilities and other liabilities	(2.6)	10.5
Net cash provided by operating activities from continuing operations	22.6	31.1
Cash flows from investing activities of continuing operations:
Acquisitions, net of cash received	(27.8)	(5.0)
Additions to property, plant & equipment	(29.8)	(28.2)
Additions to intangible assets	(2.2)	(1.0)
Proceeds from sale of property, plant & equipment	1.9	4.1
Other investing activities	0.2	0.2
Net cash used in investing activities from continuing operations	(57.7)	(29.9)
Cash flows from financing activities of continuing operations:
Payments of long-term debt	(262.7)	(0.4)
Issuance of long-term debt		750.0
Borrowings under ABL	0.6
Payments under ABL	(0.6)
Premiums and costs paid upon extinguishment of long-term debt	(12.5)
Financing fees	(1.5)	(9.4)
Issuance of common shares	1.8	0.5
Common shares repurchased and cancelled	(5.6)	(1.8)
Dividends paid to common shareowners	(8.4)	(8.4)
Other financing activities	(1.3)	(1.0)
Net cash (used in) provided by financing activities from continuing operations	(290.2)	729.5
Cash flows from discontinued operations:
Operating activities of discontinued operations	(74.4)	(34.8)
Investing activities of discontinued operations	1,228.6	(14.2)
Financing activities of discontinued operations	(769.7)	(270.8)
Net cash provided by (used in) discontinued operations	384.5	(319.8)
Effect of exchange rate changes on cash	(4.8)	1.5
Net increase in cash, cash equivalents and restricted	54.4	412.4
Cash & cash equivalents and restricted cash, beginning of period	157.9	118.1
Cash & cash equivalents and restricted cash, end of period	212.3	530.5
Cash & cash equivalents and restricted cash from discontinued operations, end of period		457.6
Cash & cash equivalents and restricted cash from continuing operations, end of period	212.3	72.9
Supplemental Non-cash Investing and Financing Activities:
Accrued deferred financing fees		2.2
Dividends payable	0.1
Additions to property, plant & equipment through accounts payable and accrued liabilities	9.9	8.3
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	10.7	17.5
Cash paid for income taxes, net	$ 1.4	$ 0.7