Restructuring Charges - Summary (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended	9 Months Ended
	Jun. 30, 2018	Jun. 30, 2018	Jun. 30, 2018
Restructuring Reserve [Roll Forward]
Remaining liability at beginning of period		$ 35,188
Charges	$ 47,800	72,711	$ 117,800
Payments/Utilization		(42,530)
Remaining liability at end of period	65,369	65,369	65,369
Severance
Restructuring Reserve [Roll Forward]
Remaining liability at beginning of period		29,794
Charges		46,470
Payments/Utilization		(30,307)
Remaining liability at end of period	45,957	45,957	45,957
Other restructuring costs
Restructuring Reserve [Roll Forward]
Remaining liability at beginning of period		5,394
Charges		26,241
Payments/Utilization		(12,223)
Remaining liability at end of period	$ 19,412	$ 19,412	$ 19,412