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Condensed Consolidating Financial Statements - Condensed Consolidating Statement of Cash Flows (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2017 | Dec. 25, 2016 | Dec. 27, 2015
Condensed Financial Statements, Captions [Line Items] |  |  |
Net cash provided by (used in) operating activities from continuing operations | $ (27.0) | $ (12.4) | $ (29.7)
Investing activities: |  |  |
Investment in affiliated companies | 0.0 | 0.0 | 0.0
Cash paid for acquisitions, net of cash acquired | 0.0 | (5.1) | 0.0
Change in restricted cash | 0.0 | 0.3 | 4.7
Capital expenditures | (26.5) | (9.2) | (11.3)
Proceeds from sale of assets | 0.7 | 0.1 | 0.9
Net cash used in investing activities from continuing operations | (25.8) | (13.9) | (5.7)
Financing activities: |  |  |
Proceeds from the issuance of long-term debt | 300.0 | 0.0 | 0.0
Extinguishment of long-term debt | (448.8) | (14.1) | (175.0)
Repayments under credit facility | (1.0) | (1.0) | (42.0)
Debt issuance costs | (6.6) | 0.0 | 0.0
Proceeds from the issuance of common stock | 269.1 | 76.2 |
Proceeds from exercise of restricted stock units, employee stock options, and employee stock purchase plan | 0.7 | 2.0 | 3.4
Financing from affiliated companies | 0.0 | 0.0 | 0.0
Other, net |  |  | (1.1)
Net cash provided by (used in) financing activities from continuing operations | 113.4 | 63.1 | (214.7)
Net cash flows of continuing operations | 60.6 | 36.8 | (250.1)
Net operating cash flows of discontinued operations | 0.0 | 0.1 | 2.8
Net investing cash flows from discontinued operations | (0.6) | 4.0 | 242.5
Effect of exchange rate changes on cash and cash equivalents | 0.5 | (0.3) | (0.2)
Net increase (decrease) in cash and cash equivalents | 60.5 | 40.6 | (5.0)
Eliminations |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
Net cash provided by (used in) operating activities from continuing operations | 0.0 | 0.0 | 0.0
Investing activities: |  |  |
Investment in affiliated companies | 33.2 | 3.0 | 33.8
Cash paid for acquisitions, net of cash acquired |  | 0.0 |
Change in restricted cash |  | 0.0 | 0.0
Capital expenditures | 0.0 | 0.0 | 0.0
Proceeds from sale of assets | 0.0 | 0.0 | 0.0
Net cash used in investing activities from continuing operations | 33.2 | 3.0 | 33.8
Financing activities: |  |  |
Proceeds from the issuance of long-term debt | 0.0 |  |
Extinguishment of long-term debt | 0.0 | 0.0 | 0.0
Repayments under credit facility | 0.0 | 0.0 | 0.0
Debt issuance costs | 0.0 |  |
Proceeds from the issuance of common stock | 0.0 | 0.0 |
Proceeds from exercise of restricted stock units, employee stock options, and employee stock purchase plan | 0.0 | 0.0 | 0.0
Financing from affiliated companies | (33.2) | (3.0) | (33.8)
Other, net |  |  | 0.0
Net cash provided by (used in) financing activities from continuing operations | (33.2) | (3.0) | (33.8)
Net cash flows of continuing operations | 0.0 | 0.0 | 0.0
Net operating cash flows of discontinued operations |  | 0.0 | 0.0
Net investing cash flows from discontinued operations | 0.0 | 0.0 | 0.0
Effect of exchange rate changes on cash and cash equivalents | 0.0 | 0.0 | 0.0
Net increase (decrease) in cash and cash equivalents | 0.0 | 0.0 | 0.0
Parent Company |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
Net cash provided by (used in) operating activities from continuing operations | (25.9) | (26.3) | (2.0)
Investing activities: |  |  |
Investment in affiliated companies | (33.2) | 0.0 | (33.8)
Cash paid for acquisitions, net of cash acquired |  | 0.0 |
Change in restricted cash |  | 0.0 | 0.0
Capital expenditures | (0.8) | (0.5) | (1.0)
Proceeds from sale of assets | 0.0 | 0.0 | 0.0
Net cash used in investing activities from continuing operations | (34.0) | (0.5) | (34.8)
Financing activities: |  |  |
Proceeds from the issuance of long-term debt | 300.0 |  |
Extinguishment of long-term debt | (448.8) | (14.1) | (175.0)
Repayments under credit facility | 0.0 | 0.0 | (41.0)
Debt issuance costs | (6.6) |  |
Proceeds from the issuance of common stock | 269.1 | 76.2 |
Proceeds from exercise of restricted stock units, employee stock options, and employee stock purchase plan | 0.7 | 2.0 | 3.4
Financing from affiliated companies | 0.0 | 3.0 | 0.0
Other, net |  |  | 0.0
Net cash provided by (used in) financing activities from continuing operations | 114.4 | 67.1 | (212.6)
Net cash flows of continuing operations | 54.5 | 40.3 | (249.4)
Net operating cash flows of discontinued operations |  | 0.4 | 0.0
Net investing cash flows from discontinued operations | (0.6) | 4.0 | 243.2
Effect of exchange rate changes on cash and cash equivalents | 0.0 | 0.0 | 0.0
Net increase (decrease) in cash and cash equivalents | 53.9 | 44.7 | (6.2)
Subsidiary Guarantors on a Combined Basis |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
Net cash provided by (used in) operating activities from continuing operations | (8.8) | 16.6 | (30.8)
Investing activities: |  |  |
Investment in affiliated companies | 0.0 | (3.0) | 0.0
Cash paid for acquisitions, net of cash acquired |  | (5.1) |
Change in restricted cash |  | 0.3 | 4.7
Capital expenditures | (23.9) | (7.1) | (9.5)
Proceeds from sale of assets | 0.7 | 0.1 | 0.9
Net cash used in investing activities from continuing operations | (23.2) | (14.8) | (3.9)
Financing activities: |  |  |
Proceeds from the issuance of long-term debt | 0.0 |  |
Extinguishment of long-term debt | 0.0 | 0.0 | 0.0
Repayments under credit facility | 0.0 | 0.0 | 0.0
Debt issuance costs | 0.0 |  |
Proceeds from the issuance of common stock | 0.0 | 0.0 |
Proceeds from exercise of restricted stock units, employee stock options, and employee stock purchase plan | 0.0 | 0.0 | 0.0
Financing from affiliated companies | 33.2 | 0.0 | 33.8
Other, net |  |  | (1.1)
Net cash provided by (used in) financing activities from continuing operations | 33.2 | 0.0 | 32.7
Net cash flows of continuing operations | 1.2 | 1.8 | (2.0)
Net operating cash flows of discontinued operations |  | (0.3) | 3.1
Net investing cash flows from discontinued operations | 0.0 | 0.0 | (0.4)
Effect of exchange rate changes on cash and cash equivalents | 0.0 | 0.0 | 0.0
Net increase (decrease) in cash and cash equivalents | 1.2 | 1.5 | 0.7
Non-Guarantors on a Combined Basis |  |  |
Condensed Financial Statements, Captions [Line Items] |  |  |
Net cash provided by (used in) operating activities from continuing operations | 7.7 | (2.7) | 3.1
Investing activities: |  |  |
Investment in affiliated companies | 0.0 | 0.0 | 0.0
Cash paid for acquisitions, net of cash acquired |  | 0.0 |
Change in restricted cash |  | 0.0 | 0.0
Capital expenditures | (1.8) | (1.6) | (0.8)
Proceeds from sale of assets | 0.0 | 0.0 | 0.0
Net cash used in investing activities from continuing operations | (1.8) | (1.6) | (0.8)
Financing activities: |  |  |
Proceeds from the issuance of long-term debt | 0.0 |  |
Extinguishment of long-term debt | 0.0 | 0.0 | 0.0
Repayments under credit facility | (1.0) | (1.0) | (1.0)
Debt issuance costs | 0.0 |  |
Proceeds from the issuance of common stock | 0.0 | 0.0 |
Proceeds from exercise of restricted stock units, employee stock options, and employee stock purchase plan | 0.0 | 0.0 | 0.0
Financing from affiliated companies | 0.0 | 0.0 | 0.0
Other, net |  |  | 0.0
Net cash provided by (used in) financing activities from continuing operations | (1.0) | (1.0) | (1.0)
Net cash flows of continuing operations | 4.9 | (5.3) | 1.3
Net operating cash flows of discontinued operations |  | 0.0 | (0.3)
Net investing cash flows from discontinued operations | 0.0 | 0.0 | (0.3)
Effect of exchange rate changes on cash and cash equivalents | 0.5 | (0.3) | (0.2)
Net increase (decrease) in cash and cash equivalents | $ 5.4 | $ (5.6) | $ 0.5

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