Equity - Reclassifications out of Accumulated Other Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2017	Dec. 31, 2016
Accumulated Other Comprehensive Income (Loss) [Line Items]
Reclassification from accumulated other comprehensive (loss), current period	$ (37,474)	$ (56,275)	$ (78,643)	$ (109,685)
Tax benefit	9,162	20,102	23,596	39,350
Net of tax	(28,312)	(36,173)	(55,047)	(70,335)
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	(1,545)	(1,717)	(3,683)	(3,467)
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	$ (35,929)	$ (54,558)	$ (74,960)	$ (106,218)