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Intangible Contract Assets and Liabilities - Narrative (Details) - Fresh Start Reporting - USD ($) $ in Millions | 3 Months Ended |
--- | --- | ---
Jun. 30, 2017 | Apr. 03, 2017
Sales Contracts |  |
Fresh-Start Adjustment [Line Items] |  |
Intangible assets |  | $ 314.9
Liabilities |  | 58.7
Intangible liabilities |  | $ 116.2
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] |  |
Amortization, remainder of 2017 | $ 67.2 |
Amortization, 2018 | 76.6 |
Amortization, 2019 | 37.9 |
Amortization, 2020 | 8.8 |
Amortization, 2021 | 7.3 |
Amortization of intangible assets | 29.7 |
Take-Or-Pay Contracts |  |
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract] |  |
Amortization of intangible liabilities | 9.5 |
Amortization of intangible liabilities, remainder of 2017 | 12.8 |
Amortization of intangible liabilities, 2018 | 27.1 |
Amortization of intangible liabilities, 2019 | 18.2 |
Amortization of intangible liabilities, 2020 | 9.2 |
Amortization of intangible liabilities, 2021 | $ 4.4 |

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- Definition The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 45 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a)(2) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275 + Details
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- Definition Sum of the carrying amounts as of the balance sheet date of all liabilities that are recognized. Liabilities are probable future sacrifices of economic benefits arising from present obligations of an entity to transfer assets or provide services to other entities in the future. + 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 210.5-02.19-26) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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