Stockholders' Deficit - Stock Repurchase Program (Details) - USD ($)		3 Months Ended			6 Months Ended	9 Months Ended
	Aug. 29, 2016	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2016	Dec. 31, 2016	Mar. 31, 2017	Apr. 26, 2016	Jan. 22, 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		$ 221,300,000				$ 221,300,000
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)	1,760,000		350,000		2,100,000	2,106,709
Percentage of shares to be repurchased	80.00%
Repurchase of common stock, amount	$ 80,000,000			80,000,000		$ 100,000,000
Reduction to additional paid-in capital				$ 20,000,000
Open Market Transaction
Class of Stock [Line Items]
Repurchase of common stock (in shares)		1,736,330				3,862,425
Repurchase of common stock, amount		$ 100,000,000				$ 200,000,000