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Share-Based Compensation Textuals (Details) shares in Millions, $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Apr. 01, 2017 years shares | Dec. 31, 2017 USD ($) shares
Successor |  |
Share-Based Compensation Textuals [Abstract] |  |
Unrecognized compensation cost related to nonvested awards net of tax Total | $ |  | $ 57.5
Unrecognized compensation cost period for recognition, years | 2 years 6 months |
Unrecognized compensation cost period for recognition, weighted-average, years | years | 1.0 |
Successor | Restricted Stock Units (RSUs) [Member] |  |
Share-Based Compensation Textuals [Abstract] |  |
Vesting period of performance units |  | 3 years
Total fair value of restricted stock awards granted | $ |  | $ 79.8
Total fair value of restricted stock awards vested | $ |  | $ 0.9
Common Stock | Successor |  |
Share-Based Compensation Textuals [Abstract] |  |
Number of Shares Authorized | shares |  | 10.5
Effect of Plan | 2017 Incentive Plan |  |
Share-Based Compensation Expense and Cash Flows (Line Items) |  |
Common stock reserved for future issuance | shares | 14.0 |
Effect of Plan | Predecessor | 2017 Incentive Plan |  |
Share-Based Compensation Expense and Cash Flows (Line Items) |  |
Common stock reserved for future issuance | shares | 14.0 |

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- Definition Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition, Weighted-Average + References No definition available. + Details
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- Definition Share based compensation arrangement by share based payment award equity instruments other than options granted in period fair value. + References No definition available. + Details
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- Definition Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Fair Value. + References No definition available. + Details
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- Definition Share-Based Compensation. + References No definition available. + Details
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- Definition Aggregate number of common shares reserved for future issuance. + 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 210.5-02.29) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Unrecognized cost of unvested share-based compensation awards. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Weighted average period over which unrecognized compensation is expected to be recognized for equity-based compensation plans, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition Period which an employee's right to exercise an award is no longer contingent on satisfaction of either a service condition, market condition or a performance condition, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(1) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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- Definition The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested). + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=96867065&loc=d3e5070-113901 + Details
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