Share-based Compensation and Employee Benefit Plans - Cost of Defined Contribution Plan (Details) - USD ($) $ in Millions	2 Months Ended	3 Months Ended		8 Months Ended	9 Months Ended
	Jun. 08, 2016	Jun. 30, 2017	Jun. 30, 2016	Jun. 08, 2016	Jun. 30, 2017	Jun. 30, 2016
Defined Benefit Plan Disclosure [Line Items]
Period acquiree is included in operating activities		22 days			22 days
Successor
Defined Benefit Plan Disclosure [Line Items]
Contributions		$ 2.6	$ 0.6		$ 7.8	$ 0.6
Successor | Cost of sales and operating expense
Defined Benefit Plan Disclosure [Line Items]
Contributions		1.0	0.2		3.0	0.2
Successor | Selling, general and administrative expenses
Defined Benefit Plan Disclosure [Line Items]
Contributions		$ 1.6	$ 0.4		$ 4.8	$ 0.4
Predecessor
Defined Benefit Plan Disclosure [Line Items]
Contributions	$ 2.3			$ 7.5
Predecessor | Cost of sales and operating expense
Defined Benefit Plan Disclosure [Line Items]
Contributions	0.8			2.7
Predecessor | Selling, general and administrative expenses
Defined Benefit Plan Disclosure [Line Items]
Contributions	$ 1.5			$ 4.8