Restructuring and Other Charges, net (By Segment) (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Restructuring Cost and Reserve [Line Items]
Restructuring charges	$ (564)	$ (1,686)	$ (7,432)	$ (14,727)
Restructuring Charges and Other Expenses	(1,920)	(1,947)	(14,932)	(26,446)
Healthcare
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(121)	(223)	(3,678)	(4,814)
Restructuring Charges and Other Expenses	(121)	(223)	(3,678)	(4,814)
Enterprise
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(45)	(165)	(2,210)	(5,099)
Restructuring Charges and Other Expenses	(45)	(165)	(2,210)	(5,099)
Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(34)	(544)	(277)	(1,458)
Restructuring Charges and Other Expenses	(34)	(783)	(277)	(4,764)
Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(454)	(1,084)	(1,821)	(3,356)
Restructuring Charges and Other Expenses	(1,810)	(1,106)	(9,321)	(11,769)
Personnel
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(443)	(1,316)	(4,778)	(13,881)
Personnel | Healthcare
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(119)	(222)	(1,901)	(4,672)
Personnel | Enterprise
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(121)	(165)	(1,416)	(5,086)
Personnel | Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges	0	(529)	0	(1,443)
Personnel | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(445)	(730)	(1,461)	(2,680)
Facilities
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(121)	(370)	(2,654)	(846)
Facilities | Healthcare
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(2)	(1)	(1,777)	(142)
Facilities | Enterprise
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(76)	0	(794)	(13)
Facilities | Other
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(34)	(15)	(277)	(15)
Facilities | Corporate
Restructuring Cost and Reserve [Line Items]
Restructuring charges	(9)	(354)	(360)	(676)
Other Restructuring [Member]
Restructuring Cost and Reserve [Line Items]
Other Charges	1,356	261	7,500	11,719
Other Restructuring [Member] | Healthcare
Restructuring Cost and Reserve [Line Items]
Other Charges	0	0	0	0
Other Restructuring [Member] | Enterprise
Restructuring Cost and Reserve [Line Items]
Other Charges	0	0	0	0
Other Restructuring [Member] | Other
Restructuring Cost and Reserve [Line Items]
Other Charges	0	239	0	3,306
Other Restructuring [Member] | Corporate
Restructuring Cost and Reserve [Line Items]
Other Charges	$ 1,356	$ 22	$ 7,500	$ 8,413