STOCKHOLDERS’ EQUITY AND NONCONTROLLING INTERESTS - Noncontrolling interests (Details) - USD ($) $ in Thousands		3 Months Ended
		Jan. 01, 2016	Jan. 02, 2015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	[1]	$ 1,726,344
Net income attributable to noncontrolling interests		(15)	$ 0
Balance at end of period		1,631,682
Increase (Decrease) in Temporary Equity [Roll Forward]
Balance at beginning of period		0
Net income attributable to noncontrolling interests		0
Reclassification of noncontrolling interests in MeVis to redeemable noncontrolling interests		10,382
Balance at end of period		10,382
Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period		14,744
Net income attributable to noncontrolling interests		15
Reclassification of noncontrolling interests in MeVis to redeemable noncontrolling interests		(10,382)
Other		(499)
Balance at end of period		$ 3,878

[1] The condensed consolidated balance sheet as of October 2, 2015 was derived from audited financial statements as of that date, but does not include all disclosures required by accounting principles generally accepted in the United States of America.