Segment Information (Reconciliation Of Segment Operating Results To Company's Earnings From Continuing Operations Before Taxes) (Details) (USD $) In Millions	12 Months Ended
	Sep. 30, 2011	Oct. 01, 2010	Oct. 02, 2009
Segment Reporting, Revenue Reconciling Item [Line Items]
Earnings from operations before taxes	$ 589	$ 533	$ 475
Interest income (expense), net	1	(1)	1
Oncology Systems [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Earnings from operations before taxes	507	462	482
X-Ray Products [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Earnings from operations before taxes	118	100	82
Total Reportable Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Earnings from operations before taxes	625	562	564
Other [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Earnings from operations before taxes	(32)	(30)	(19)
Corporate [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Earnings from operations before taxes	$ (5)	$ 2	$ (71)