CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Sep. 28, 2018	Sep. 29, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net earnings	$ 150.3	$ 219.2	$ 399.7
Adjustments to reconcile net earnings to net cash provided by operating activities:
Share-based compensation expense	45.9	41.2	48.3
Depreciation	52.1	58.5	64.2
Amortization of intangible assets	20.6	18.4	15.6
Deferred taxes	48.0	(23.3)	(28.3)
Provision for doubtful accounts receivable	4.0	43.7	3.5
Impairment charges	22.4	51.4	2.2
Loss (gain) on equity investments	7.3	(0.1)	1.6
Loss on hedges related to acquisition-related activities	5.5	0.0	0.0
Other, net	(3.1)	2.8	(0.3)
Changes in assets and liabilities, net of effects of acquisitions:
Trade and unbilled receivables	(76.1)	(18.0)	(167.7)
Inventories	(16.4)	(7.2)	(42.3)
Prepaid expenses and other assets	(3.9)	(48.9)	7.3
Accounts payable	21.9	5.5	9.7
Accrued liabilities and other long-term liabilities	175.6	12.7	58.5
Deferred revenues	0.8	43.2	(15.7)
Net cash provided by operating activities	454.9	399.1	356.3
Cash flows from investing activities:
Purchases of property, plant and equipment	(47.7)	(59.1)	(80.4)
Acquisitions, net of cash acquired	(109.0)	(3.0)	(21.1)
Issuance of notes receivable	0.0	(18.2)	(21.7)
Purchase of senior secured debt	0.0	(24.5)	0.0
Investment in available-for-sale securities	(17.8)	(13.4)	(3.3)
Sale of available-for-sale securities	15.9	0.0	8.6
Loans to CPTC	(5.9)	0.0	0.0
Purchase of foreign currency option related to acquisition-related activities	(5.5)	0.0	0.0
Repayment of notes receivables	6.3	0.0	8.3
Investment in privately-held companies	(10.1)	(8.4)	(0.6)
(Increase) decrease in restricted cash	(9.2)	0.3	0.0
Other, net	(1.0)	(3.8)	1.0
Net cash used in investing activities	(184.0)	(130.1)	(109.2)
Cash flows from financing activities:
Repurchases of common stock	(181.9)	(294.5)	(461.3)
Proceeds from issuance of common stock to employees	60.7	72.1	60.6
Tax withholdings on vesting of equity awards	(11.6)	(10.7)	(11.0)
Cash received from Varex term facility	0.0	200.0	0.0
Cash and cash equivalents contributed to Varex Imaging Corporation	0.0	(42.6)	0.0
Borrowings under credit facility agreement	503.3	231.0	83.0
Repayments under credit facility agreement	(503.3)	(223.5)	(133.0)
Net (repayments) borrowings under the credit facility agreements with maturities less than 90 days	(350.0)	(322.0)	217.1
Other	(4.2)	(2.2)	(1.2)
Net cash used in financing activities	(487.0)	(392.4)	(245.8)
Effects of exchange rate changes on cash and cash equivalents	4.7	(3.9)	(3.3)
Net decrease in cash and cash equivalents	(211.4)	(127.3)	(2.0)
Cash and cash equivalents at beginning of period	716.2	843.5	845.5
Cash and cash equivalents at end of period	$ 504.8	$ 716.2	$ 843.5