Balance Sheet Components (Tables)

12 Months Ended

Sep. 29, 2017

Balance Sheet Related Disclosures [Abstract]

Available-for-sale Securities

The following tables summarize the Company's available-for-sale securities:

	September 29, 2017
(In millions)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Original CPTC Loans	$	47.4	$	—	$	—	$	47.4
DRTC Securities	8.0		—		—		8.0
GPTC securities	4.4		—		—		4.4
Total available-for-sale securities	$	59.8	$	—	$	—	$	59.8

	September 30, 2016
(In millions)	Amortized Cost		Gross Unrealized Gains		Gross Unrealized Losses		Fair Value
Original CPTC Loans	$	95.3	$	—	$	—	$	95.3
Total available-for-sale securities	$	95.3	$	—	$	—	$	95.3

Components of Inventories

The following table summarizes the Company's inventories:

	September 29,		September 30,
(In millions)	2017		2016
Raw materials and parts	$	296.5	$	257.9
Work-in-process	47.7		69.6
Finished goods	95.5		114.9
Total inventories	$	439.7	$	442.4

Components of Prepaid Expenses and Other Current Assets

The following table summarizes the Company's prepaid expenses and other current assets:

	September 29,		September 30,
(In millions)	2017		2016
Prepaid income taxes	$	69.4	$	41.3
RPTC senior secured debt (1)	25.4		—
Prepaid compensation	11.6		9.9
Advance payments to suppliers	11.1		16.9
Other current receivables	32.5		29.2
Other prepaid expenses	49.8		43.8
Total prepaid expenses and other current assets	$	199.8	$	141.1

⁽¹⁾ See Note 16, "VPT Loans and Securities" for more information on Rinecker Proton Therapy Center ("RPTC").

Components of Property, Plant and Equipment

The following table summarizes the Company's property, plant and equipment, net:

	September 29,			September 30,
(In millions)	2017			2016
Land and land improvements	$	44.2		$	44.2
Buildings and leasehold improvements	220.4			211.7
Machinery and equipment	375.9			358.3
Construction in progress	14.6			15.9
	655.1			630.1
Accumulated depreciation and amortization	(399.8		)	(371.5		)
Total property, plant and equipment, net	$	255.3		$	258.6

Other Assets

The following table summarizes the Company's other assets:

	September 29,		September 30,
(In millions)	2017		2016
Long-term receivables, net	$	101.3	$	113.8
Deferred Compensation Plan ("DCP") assets	72.7		61.1
Long-term available-for-sale securities	59.8		—
Investments in privately-held companies	27.1		18.7
Other	39.9		33.4
Total other assets	$	300.8	$	227.0

Components of Accrued Expenses

The following table summarizes the Company's accrued liabilities:

	September 29,		September 30,
(In millions)	2017		2016
Accrued compensation and benefits	$	109.7	$	105.1
DCP liabilities	70.7		61.5
Product warranty	42.9		44.2
Income taxes payable	38.8		54.4
Other	132.6		118.4
Total accrued liabilities	$	394.7	$	383.6

Components of Other Long-Term Liabilities

The following table summarizes the Company's other long-term liabilities:

	September 29,		September 30,
(In millions)	2017		2016
Long-term income taxes payable	$	48.6	$	46.2
Deferred income taxes	19.8		24.5
Other	61.6		85.1
Total other long-term liabilities	$	130.0	$	155.8