Segment Information (Revenue and Operating Income) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 02, 2016	Jul. 04, 2015	Jul. 02, 2016	Jul. 04, 2015
Revenue	$ 288,652	$ 303,113	$ 852,296	$ 942,674
Total Segment Cost of Revenue	109,530	106,765	326,775	345,970
Cost of Revenue	82,470	79,376	242,809	258,372
Gross Profit	206,182	223,737	609,487	684,302
Segment Gross Profit	179,122	196,348	525,521	596,704
Operating income	7,596	21,607	(3,939)	63,226
Non operating income and expenses	8,300	3,668	19,880	10,492
Income before income taxes	(704)	17,939	(23,819)	52,734
Unallocated Operating Expennses	168,711	170,348	484,919	490,853
Restructuring charges	2,815	4,393	44,541	42,625
Solutions Group
Revenue	217,673	229,157	652,985	726,679
Cost of Revenue	44,882	54,583	140,465	174,109
Gross Profit	172,791	174,574	512,520	552,570
Restructuring charges	1,384	1,001	16,345	8,482
Professional Services
Revenue	50,301	53,500	148,277	177,782
Cost of Revenue	42,393	44,703	124,832	151,521
Gross Profit	7,908	8,797	23,445	26,261
Restructuring charges	264	341	4,786	10,930
Technology Platform Group
Revenue	20,678	20,456	51,034	38,213
Cost of Revenue	22,255	7,479	61,478	20,340
Gross Profit	(1,577)	12,977	(10,444)	17,873
Restructuring charges	551	111	1,286	324
unallocated [Member]
Restructuring charges	$ 616	$ 2,940	$ 22,124	$ 22,889