Restructuring and Other Charges, Net - Segments (Details) - USD ($) $ in Thousands	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net	$ 80,465	$ 57,026	$ 59,923
Restructuring and other charges, net	23,302	35,408	18,901
Health Care [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net	4,870	11,588	13,911
Restructuring and other charges, net	4,870	11,588	5,153
Enterprise
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net	5,970	6,460	5,621
Restructuring and other charges, net	5,970	6,460	5,621
Automotive
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net	51,318	4,180	1,838
Restructuring and other charges, net			1,838
Restructuring and Related Cost, Incurred Cost		4,180
Other Segments [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net	5,100	9,223	13,712
Restructuring and other charges, net	1,794
Restructuring and Related Cost, Incurred Cost		2,120	2,939
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net	13,207	25,575	24,841
Restructuring and other charges, net	3,803	11,060	3,350
Personnel
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net	19,371	31,520	12,553
Restructuring and Related Cost, Incurred Cost	19,371	31,520	12,553
Personnel | Health Care [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	4,679	11,563	4,283
Personnel | Enterprise
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	5,037	4,217	2,141
Personnel | Automotive
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	5,159	4,160	1,838
Personnel | Other Segments [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net		1,473	2,954
Personnel | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	3,039	10,107	1,337
Facilities
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net	3,931	3,888	6,348
Restructuring and Related Cost, Incurred Cost	3,931	3,888	6,348
Facilities | Health Care [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	191	25	870
Facilities | Enterprise
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	933	2,243	3,480
Facilities | Automotive
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net	6,865	647	(15)
Restructuring and Related Cost, Incurred Cost	1,706	20	0
Facilities | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Incurred Cost	764	953	2,013
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring Costs	57,163	21,618	41,022
Other Restructuring [Member] | Health Care [Member]
Restructuring Cost and Reserve [Line Items]
Other Restructuring Costs	0	0	8,758
Other Restructuring [Member] | Enterprise
Restructuring Cost and Reserve [Line Items]
Other Restructuring Costs	0	0	0
Other Restructuring [Member] | Automotive
Restructuring Cost and Reserve [Line Items]
Other Restructuring Costs	44,453	0	0
Other Restructuring [Member] | Other Segments [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring and other charges, net		7,103	10,773
Other Restructuring [Member] | Corporate
Restructuring Cost and Reserve [Line Items]
Other Restructuring Costs	$ 9,404	$ 14,515	$ 21,491