Consolidated Statements of Cash Flows - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jun. 30, 2018	Jul. 01, 2017
Cash flows from operating activities of continuing operations:
Net income (loss)	$ 10.8	$ (22.3)	$ 372.8	$ (56.7)
Net (loss) income from discontinued operations, net of income taxes	(1.4)	(17.8)	356.0	(42.0)
Net income (loss) from continuing operations	12.2	(4.5)	16.8	(14.7)
Adjustments to reconcile net income (loss) from continuing operations to cash flows from operating activities:
Depreciation and amortization	48.7	48.8	96.1	92.4
Amortization of financing fees	0.8	0.5	1.7	0.8
Amortization of senior notes premium	0.0	(1.2)	(0.4)	(2.8)
Share-based compensation expense	4.4	5.0	7.8	9.0
Provision for deferred income taxes	2.9	2.7	2.7	4.5
Commodity hedging loss (gain), net	0.0	0.4	0.3	(1.5)
Gain on extinguishment of debt	0.0	(1.5)	(7.1)	(1.5)
Gain on sale of business	(6.0)	0.0	(6.0)	0.0
Loss on disposal of property, plant and equipment, net	1.3	3.9	2.6	5.2
Other non-cash items	(2.2)	(3.0)	(2.1)	(4.8)
Change in operating assets and liabilities, net of acquisitions:
Accounts receivable	(6.5)	(20.4)	(19.2)	(20.3)
Inventories	(4.6)	(1.2)	(13.7)	(9.6)
Prepaid expenses and other current assets	(2.3)	3.7	(6.6)	(2.8)
Other assets	0.2	4.2	1.2	4.1
Accounts payable and accrued liabilities and other liabilities	(13.9)	24.0	(16.5)	34.5
Net cash provided by operating activities from continuing operations	35.0	61.4	57.6	92.5
Cash flows from investing activities of continuing operations:
Acquisitions, net of cash received	(38.8)	(25.0)	(66.6)	(30.0)
Additions to property, plant and equipment	(28.9)	(30.7)	(58.7)	(58.9)
Additions to intangible assets	(2.0)	(1.6)	(4.2)	(2.6)
Proceeds from sale of property, plant and equipment	1.0	(1.2)	2.9	2.9
Proceeds from sale of business, net of cash sold	12.8	0.0	12.8	0.0
Other investing activities	0.1	0.2	0.3	0.4
Net cash used in investing activities from continuing operations	(55.8)	(58.3)	(113.5)	(88.2)
Cash flows from financing activities of continuing operations:
Payments of long-term debt	(0.6)	(101.2)	(263.3)	(101.6)
Issuance of long-term debt	0.0	0.0	0.0	750.0
Borrowings under ABL	0.4	0.0	1.0	0.0
Payments under ABL	(0.4)	0.0	(1.0)	0.0
Premiums and costs paid upon extinguishment of long-term debt	0.0	(7.7)	(12.5)	(7.7)
Issuance of common shares	2.4	0.3	4.2	0.8
Common shares repurchased and canceled	(16.1)	0.0	(21.7)	(1.8)
Financing fees	0.0	(1.7)	(1.5)	(11.1)
Dividends paid to common shareholders	(8.4)	(8.3)	(16.8)	(16.7)
Payment of deferred consideration for acquisitions	(2.8)	0.0	(2.8)	0.0
Other financing activities	3.4	1.5	2.1	0.5
Net cash (used in) provided by financing activities from continuing operations	(22.1)	(117.1)	(312.3)	612.4
Cash flows from discontinued operations:
Operating activities of discontinued operations	(3.3)	43.5	(77.7)	8.7
Investing activities of discontinued operations	0.0	(9.2)	1,228.6	(23.4)
Financing activities of discontinued operations	0.0	(330.5)	(769.7)	(601.3)
Net cash (used in) provided by discontinued operations	(3.3)	(296.2)	381.2	(616.0)
Effect of exchange rate changes on cash	(3.7)	2.9	(8.5)	4.4
Net (decrease) increase in cash, cash equivalents and restricted cash	(49.9)	(407.3)	4.5	5.1
Cash and cash equivalents and restricted cash, beginning of period	212.3	530.5	157.9	118.1
Cash and cash equivalents and restricted cash, end of period	162.4	123.2	162.4	123.2
Cash and cash equivalents and restricted cash of discontinued operations, end of period	0.0	55.0	0.0	55.0
Cash and cash equivalents and restricted cash from continuing operations, end of period	162.4	68.2	162.4	68.2
Supplemental Non-cash Investing and Financing Activities:
Accrued deferred financing fees	0.0	0.0	0.0	0.6
Dividends payable	0.3	0.0	0.4	0.0
Additions to property, plant and equipment through accounts payable and accrued liabilities and other liabilities	10.8	8.9	14.1	9.2
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	35.7	15.3	46.4	32.8
Cash paid for income taxes, net	$ 0.8	$ 1.1	$ 2.2	$ 1.8