Equity - Reclassifications out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from accumulated other comprehensive (loss), current period	$ (37,214)	$ (55,462)	$ (115,857)	$ (165,148)
Tax benefit	11,996	19,950	35,591	59,301
Net of tax	(25,218)	(35,512)	(80,266)	(105,847)
Accumulated Defined Benefit Plans Adjustment, Net Prior Service Attributable to Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from accumulated other comprehensive (loss), current period	(1,608)	(1,735)	(5,291)	(5,202)
Accumulated Defined Benefit Plans Adjustment, Net Gain (Loss) Attributable to Parent
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from accumulated other comprehensive (loss), current period	$ (35,606)	$ (53,727)	$ (110,566)	$ (159,946)