Consolidated Statements of Cash Flows $ in Millions	12 Months Ended
	Dec. 30, 2017 USD ($)	Dec. 31, 2016 USD ($)	Jan. 02, 2016 USD ($)
Cash flows from operating activities of continuing operations:
Net income (loss)	$ 7.1	$ (71.5)	$ 20.6
Net income (loss) from discontinued operations, net of income taxes	10.7	(11.2)	4.9
Net (loss) income from continuing operations	(3.6)	(60.3)	15.7
Adjustments to reconcile net (loss) income from continuing operations to cash flows provided by operating activities:
Depreciation & amortization	188.6	151.1	128.3
Amortization of financing fees	1.9	0.5
Amortization of senior notes premium	(5.1)	(5.9)	(5.6)
Share-based compensation expense	17.5	7.0	7.6
(Benefit) provision for deferred income taxes	(33.9)	19.9	(22.0)
Unrealized commodity hedging (gain) loss, net	(0.3)	9.7
Gain on extinguishment of debt, net	(1.5)
Loss on disposal of property, plant & equipment, net	10.2	6.6	4.2
Other non-cash items	1.9	9.7	(9.1)
Change in operating assets and liabilities, net of acquisitions:
Accounts receivable	(8.0)	(3.1)	(3.8)
Inventories	(2.0)	12.9	1.0
Prepaid expenses and other current assets	0.9	(4.6)	1.7
Other assets	2.1	(1.3)	(3.3)
Accounts payable and accrued liabilities and other liabilities	7.3	3.3	16.4
Net cash provided by operating activities from continuing operations	176.0	145.5	131.1
Cash flows from investing activities of continuing operations:
Acquisitions, net of cash received	(35.5)	(959.4)	(24.0)
Additions to property, plant & equipment	(121.3)	(95.1)	(69.6)
Additions to intangible assets	(5.6)	(4.2)	(3.0)
Proceeds from sale of property, plant & equipment and sale-leaseback	7.8	5.7	30.0
Other investing activities	1.0	0.4
Net cash used in investing activities from continuing operations	(153.6)	(1,052.6)	(66.6)
Cash flows from financing activities of continuing operations:
Payments of long-term debt	(101.5)	(0.5)
Issuance of long-term debt	750.0	498.7
Premiums and costs paid upon extinguishment of long-term debt	(7.7)
Issuance of common shares	3.5	366.8	143.1
Financing fees	(11.1)	(10.1)
Preferred shares repurchased and cancelled			(148.8)
Common shares repurchased and cancelled	(3.8)	(5.7)	(0.8)
Dividends paid to common and preferred shareholders	(33.4)	(31.4)	(31.0)
Payment of contingent consideration for acquisitions		(10.8)
Other financing activities	0.5	0.1
Net cash provided by (used in) financing activities from continuing operations	596.5	807.1	(37.5)
Cash flows from discontinued operations:
Operating activities of discontinued operations	102.7	124.3	123.5
Investing activities of discontinued operations	(44.7)	(44.0)	(33.1)
Financing activities of discontinued operations	(643.4)	68.6	(122.6)
Net cash (used in) provided by discontinued operations	(585.4)	148.9	(32.2)
Effect of exchange rate changes on cash	6.3	(7.9)	(3.9)
Net increase (decrease) in cash & cash equivalents and restricted cash	39.8	41.0	(9.1)
Cash & cash equivalents and restricted cash, beginning of period	118.1	77.1	86.2
Cash & cash equivalents, end of period	157.9	118.1	77.1
Cash & cash equivalents of discontinued operations, end of period	66.0	40.0	55.3
Cash & cash equivalents from continuing operations, end of period	91.9	78.1	21.8
Supplemental Non-cash Investing and Financing Activities:
Additions to property, plant & equipment through accounts payable and accrued liabilities and other liabilities	10.9	3.1	0.7
Accrued deferred financing fees	0.6	0.5
Dividends payable issued through accounts payable and other accrued liabilities	0.3	0.3
Supplemental Disclosures of Cash Flow Information:
Cash paid for interest	81.6	48.5	34.9
Cash paid for income taxes, net	$ 1.9	$ 3.3	$ 2.5