ACCUMULATED OTHER COMPREHENSIVE INCOME (LOSS) - Schedule of Changes in Accumulated Other Comprehensive Income Loss (Detail) - Predecessor $ in Millions	3 Months Ended
	Mar. 31, 2016 USD ($)
Cash Flow Hedges
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, net of tax	$ 24.0
Other comprehensive income (loss) before reclassifications:
Change in fair value of derivatives	4.6
Income tax effect	(1.6)
Net of tax	3.0
Amounts reclassified from accumulated other comprehensive income:
Income tax effect	(4.5)
Net of tax	8.3
Other comprehensive income (loss), net of tax	(5.3)
Ending balance, net of tax	18.7
Cash Flow Hedges | Operating revenue: oil/natural gas production
Amounts reclassified from accumulated other comprehensive income:
Operating revenue: oil/natural gas production	12.8
Cash Flow Hedges | Other operational expenses
Amounts reclassified from accumulated other comprehensive income:
Operating revenue: oil/natural gas production	0.0
Foreign Currency Items
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, net of tax	(6.0)
Other comprehensive income (loss) before reclassifications:
Change in fair value of derivatives	0.0
Income tax effect	0.0
Net of tax	0.0
Amounts reclassified from accumulated other comprehensive income:
Income tax effect	0.0
Net of tax	(6.0)
Other comprehensive income (loss), net of tax	6.0
Ending balance, net of tax	0.0
Foreign Currency Items | Operating revenue: oil/natural gas production
Amounts reclassified from accumulated other comprehensive income:
Operating revenue: oil/natural gas production	0.0
Foreign Currency Items | Other operational expenses
Amounts reclassified from accumulated other comprehensive income:
Operating revenue: oil/natural gas production	(6.0)
Accumulated Other Comprehensive Income (Loss)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance, net of tax	18.0
Other comprehensive income (loss) before reclassifications:
Change in fair value of derivatives	4.6
Income tax effect	(1.6)
Net of tax	3.0
Amounts reclassified from accumulated other comprehensive income:
Income tax effect	(4.5)
Net of tax	2.3
Other comprehensive income (loss), net of tax	0.7
Ending balance, net of tax	18.7
Accumulated Other Comprehensive Income (Loss) | Operating revenue: oil/natural gas production
Amounts reclassified from accumulated other comprehensive income:
Operating revenue: oil/natural gas production	12.8
Accumulated Other Comprehensive Income (Loss) | Other operational expenses
Amounts reclassified from accumulated other comprehensive income:
Operating revenue: oil/natural gas production	$ (6.0)