Derivative Instruments - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Gain (loss) from components excluded from assessment of cash flow hedge effectiveness, net	$ 0
Gain (loss) on discontinuation of cash flow hedge due to forecasted transaction probable of not occurring, net	0	$ 0	$ 0	$ 0
Cash flow hedge gain (loss) to be reclassified within twelve months	$ (5,400,000)