SEGMENT INFORMATION - Operating Results Information for Each Reportable Segment (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jul. 01, 2016	Jul. 03, 2015	Jul. 01, 2016	Jul. 03, 2015
Segment Reporting Information [Line Items]
Revenues	$ 789,419	$ 784,011	$ 2,305,319	$ 2,281,271
Operating Earnings (Loss)	130,469	144,244	381,102	419,730
Corporate
Segment Reporting Information [Line Items]
Operating Earnings (Loss)	(26,600)	600	(46,600)	(30,800)
Operating Segments | Oncology Systems
Segment Reporting Information [Line Items]
Revenues	605,200	558,700	1,778,600	1,711,400
Operating Earnings (Loss)	142,500	110,600	387,200	362,600
Operating Segments | Imaging Components
Segment Reporting Information [Line Items]
Revenues	146,700	134,700	431,800	456,200
Operating Earnings (Loss)	28,200	23,200	79,100	104,400
Operating Segments | Total reportable segments
Segment Reporting Information [Line Items]
Revenues	751,900	693,400	2,210,400	2,167,600
Operating Earnings (Loss)	170,700	133,800	466,300	467,000
Operating Segments | Other
Segment Reporting Information [Line Items]
Revenues	37,500	90,600	94,900	113,700
Operating Earnings (Loss)	$ (13,600)	$ 9,800	$ (38,600)	$ (16,500)