Income Taxes - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2016	Dec. 31, 2015
Income Tax Disclosure [Abstract]
Provision for income taxes	$ 15.6	$ 21.1	$ 33.4	$ 39.2
Effective income tax rate	34.10%	34.40%	34.40%	34.70%