CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Oct. 01, 2021	Oct. 02, 2020	Sep. 27, 2019
Cash flows from operating activities:
Net income (loss)	$ 17.9	$ (57.4)	$ 15.8
Adjustments to reconcile net income (loss) to net cash provided by operating activities:
Share-based compensation expense	13.9	13.4	11.7
Depreciation	20.5	22.3	23.5
Amortization of intangible assets	16.8	17.2	15.7
Intangible assets impairment	0.0	2.8	4.8
Other assets impairment charges	0.5	2.7	0.0
Inventory write-down	3.5	18.1	3.1
Deferred taxes	(3.0)	(3.1)	(12.9)
Amortization of deferred loan costs	10.0	5.1	2.4
Loss from equity method investments, net of dividends received	3.0	1.3	2.3
Other, net	1.3	4.7	0.8
Changes in assets and liabilities, net of effects of acquisitions:
Accounts receivable	(32.9)	17.7	14.8
Inventories	42.8	(42.7)	(11.1)
Prepaid expenses and other assets	(0.9)	(9.3)	4.3
Accounts payable	(13.6)	14.3	(9.0)
Accrued operating liabilities and other long-term operating liabilities	12.2	8.1	10.9
Deferred revenues	0.6	(2.0)	(5.2)
Net cash provided by operating activities	92.6	13.2	71.9
Cash flows from investing activities:
Purchases of property, plant and equipment	(15.1)	(23.5)	(19.8)
Acquisitions of businesses, net of cash acquired	0.0	(1.6)	(69.5)
Investments in privately-held companies	(1.4)	(1.8)	(3.9)
Other	0.3	0.0	0.0
Net cash used in investing activities	(16.2)	(26.9)	(93.2)
Cash flows from financing activities:
Proceeds from issuance of debt	1.5	593.8	85.4
Repayments of borrowings	(33.1)	(483.9)	(87.0)
Payment of debt issuance costs	0.0	(16.7)	(0.5)
Proceeds from issuance of warrant	0.0	49.8	0.0
Purchases of hedges	0.0	(61.0)	0.0
Proceeds from shares issued under employee stock purchase plan	2.8	3.6	3.8
Proceeds from exercise of stock options	0.0	1.5	0.8
Taxes related to net share settlement of equity awards	(1.5)	(1.8)	(2.1)
Other financing activities	(2.0)	(1.7)	(0.5)
Net cash (used in) provided by financing activities	(32.3)	83.6	(0.1)
Effects of exchange rate changes on cash and cash equivalents and restricted cash	(0.1)	0.9	(0.7)
Net increase (decrease) in cash and cash equivalents and restricted cash	44.0	70.8	(22.1)
Cash and cash equivalents and restricted cash at beginning of period	102.1	31.3	53.4
Cash and cash equivalents and restricted cash at end of period	146.1	102.1	31.3
Supplemental cash flow information:
Cash paid for interest	21.6	16.7	19.9
Cash paid for income tax, net of refunds	14.1	4.2	8.2
Supplemental non-cash activities:
Purchases of property, plant and equipment financed through accounts payable	$ 1.5	$ 1.6	$ 1.8