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Debt - ABL Credit Facility and Covenants (Details) - USD ($) | 1 Months Ended | 12 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Jun. 30, 2016
Debt Instrument [Line Items] |  |  |  |
Debt, gross |  | $ 2,174,300,000 |  |
Line of Credit | ABL Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Fixed charge coverage ratio (not less than) |  | 1 |  |
Line of Credit | Other Borrowings |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum borrowing capacity | $ 10,000,000.0 |  |  |
Remaining Capacity |  |  | $ 7,400,000 |
Line of credit facility, percentage ratio of interest rate to prevailing base lending rates | 110.00% |  |  |
Senior Secured Revolving Credit Facility | Line of Credit | ABL Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum borrowing capacity |  |  |  | $ 1,750,000,000
Cash proceeds reinvestment percentage (less than) |  | 100.00% |  |
Cash proceeds reinvestment period |  | 365 days |  |
Covenant terms, available loan commitments (less than) |  | $ 250,000,000 |  |
Covenant terms, collateral, percentage of capital stock |  | 65.00% |  |
Maximum payment of dividends (not to exceed) |  | $ 200,000,000 |  |
Remaining Capacity |  | 597,200,000 |  |
Debt, gross |  | 1,130,000,000 | $ 910,000,000 |
Revolving Credit Facility | Line of Credit | ABL Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum borrowing capacity |  |  |  | 350,000,000
Letter of Credit | Line of Credit | ABL Credit Facility |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Maximum borrowing capacity |  |  |  | $ 250,000,000
Remaining Capacity |  | $ 227,200,000 |  |

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- Definition Line of Credit Facility, Covenant Terms, Collateral, Percentage of Capital Stock + References No definition available. + Details
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- Definition Line of Credit Facility, Covenant Terms, Fixed Charge Coverage Ratio, Minimum + References No definition available. + Details
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- Definition Line of Credit Facility, Covenant Terms, Maximum Payment Allowed for Cash Dividends + References No definition available. + Details
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- Definition Line of Credit Facility, Mandatory Prepayment Terms, Cash Proceeds Reinvestment, Percentage + References No definition available. + Details
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- Definition Line of Credit Facility, Mandatory Prepayment Terms, Cash Proceeds Reinvestment Period + References No definition available. + Details
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- Definition Line of Credit Facility, Mandatory Prepayment Terms, Maximum Available Remaining Capacity + References No definition available. + Details
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- Definition Line of Credit Facility, Percentage Ratio of Interest Rate to Prevailing Base Lending Rates + References No definition available. + Details
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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.19(b),22(b)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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