Stockholders' Deficit - Stock Repurchase Program (Details) - USD ($)			3 Months Ended		6 Months Ended
	Dec. 05, 2016	Aug. 29, 2016	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2016	Apr. 26, 2016	Jan. 28, 2015
Class of Stock [Line Items]
Approved stock repurchase program, authorized amount (up to)						$ 400,000,000.0	$ 450,000,000.0
Remaining capacity under the stock repurchase program			$ 321,300,000		$ 321,300,000
Open Market Transaction
Class of Stock [Line Items]
Repurchase of common stock (in shares)			987,237		2,126,095
Repurchase of common stock, amount			$ 50,000,000		$ 100,000,000
Accelerated Share Repurchase Program
Class of Stock [Line Items]
Accelerated share repurchases, payment		$ 100,000,000		$ 100,000,000
Repurchase of common stock (in shares)	350,000	1,760,000	348,854		2,106,709
Percentage of shares to be repurchased		80.00%
Repurchase of common stock, amount		$ 80,000,000	$ 20,000,000	80,000,000	$ 100,000,000
Reduction to additional paid-in capital				$ 20,000,000