Emergence from the Chapter 11 Cases and Fresh Start Reporting - Sources and Uses of Cash Upon Emergence (Details) - USD ($) $ in Millions		6 Months Ended
	Apr. 01, 2017	Sep. 30, 2017
Sources:
Private placement and rights offering	$ 1,500.0
Net proceeds from Senior Secured Term Loan	912.7
Escrowed interest from Successor Notes offering	8.0
Net impact on collateral requirements	11.6
Uses:
Payments to secured lenders	(3,489.2)
Professional fees	(8.3)	$ (250.0)
Securitization facility deferred financing costs	(3.9)
Total cash outflow at emergence	$ (1,069.1)