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Consolidated Statements of Comprehensive Income - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | ---
Apr. 01, 2017 | Dec. 31, 2017 | Dec. 31, 2016 | Dec. 31, 2015
Successor |  |  |  |
Net income (loss) |  | $ 693.3 |  |
Net unrealized gains (losses) on cash flow hedges (net of respective tax provision (benefit) of $85.9, $72.2 and ($54.6)) |  |  |  |
Decrease in fair value of cash flow hedges |  | 0.0 |  |
Reclassification for realized losses (gains) included in net loss |  | 0.0 |  |
Net unrealized gains (losses) on cash flow hedges |  | 0.0 |  |
Postretirement plans and workers' compensation obligations (net of respective tax (benefit) provision of ($1.5), $36.2 and ($10.3)) |  |  |  |
Prior service (cost) credit for the period |  | 0.0 |  |
Net actuarial (loss) gain for the period |  | 0.0 |  |
Amortization of actuarial loss and prior service cost included in net loss |  | 0.0 |  |
Postretirement plans and workers' compensation obligations |  | 0.0 |  |
Foreign currency translation adjustment |  | 1.4 |  |
Other comprehensive income (loss), net of income taxes |  | 1.4 |  |
Comprehensive loss |  | 694.7 |  |
Preferred Stock Dividends, Income Statement Impact |  | 179.5 |  |
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest |  | 15.2 |  |
Comprehensive loss attributable to common stockholders |  | $ 500.0 |  |
Predecessor |  |  |  |
Net income (loss) | $ (211.7) |  | $ (721.4) | $ (1,958.2)
Net unrealized gains (losses) on cash flow hedges (net of respective tax provision (benefit) of $85.9, $72.2 and ($54.6)) |  |  |  |
Decrease in fair value of cash flow hedges | 0.0 |  | 0.0 | (131.3)
Reclassification for realized losses (gains) included in net loss | 18.6 |  | 146.3 | 251.7
Net unrealized gains (losses) on cash flow hedges | 18.6 |  | 146.3 | 120.4
Postretirement plans and workers' compensation obligations (net of respective tax (benefit) provision of ($1.5), $36.2 and ($10.3)) |  |  |  |
Prior service (cost) credit for the period | 0.0 |  | (4.5) | 10.4
Net actuarial (loss) gain for the period | 0.0 |  | (13.5) | 18.1
Amortization of actuarial loss and prior service cost included in net loss | 4.4 |  | 15.4 | 31.9
Postretirement plans and workers' compensation obligations | 4.4 |  | (2.6) | 60.4
Foreign currency translation adjustment | 5.5 |  | (1.8) | (34.9)
Other comprehensive income (loss), net of income taxes | 28.5 |  | 141.9 | 145.9
Comprehensive loss | (183.2) |  | (579.5) | (1,812.3)
Preferred Stock Dividends, Income Statement Impact | 0.0 |  | 0.0 | 0.0
Comprehensive Income (Loss), Net of Tax, Attributable to Noncontrolling Interest | 4.8 |  | 7.9 | 7.1
Comprehensive loss attributable to common stockholders | $ (188.0) |  | $ (587.4) | $ (1,819.4)

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