Goodwill and Intangible Assets (Tables)

12 Months Ended

Sep. 28, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

Activity of Goodwill by Reportable Operating Segment

The following table reflects the activity of goodwill by reportable operating segment:

(In millions)	Oncology Systems			Proton Solutions			Total
Balance at September 30, 2016	$	170.2		$	49.8		$	220.0
Foreign currency translation adjustments	—			2.6			2.6
Balance at September 29, 2017	170.2			52.4			222.6
Business combinations	72.1			—			72.1
Foreign currency translation adjustments	(0.2		)	(0.9		)	(1.1		)
Balance at September 28, 2018	$	242.1		$	51.5		$	293.6

Gross Carrying Amount and Accumulated Amortization of Finite-Lived Intangible Assets

The following table reflects the gross carrying amount and accumulated amortization of the Company’s intangible assets, net:

	September 28, 2018							September 29, 2017
(In millions)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Technologies and patents	$	139.6	$	(73.9	)	$	65.7	$	102.0	$	(60.9	)	$	41.1
Customer contracts and supplier relationship	44.9		(19.1		)	25.8		33.9		(14.3		)	19.6
Other	6.6		(5.8		)	0.8		5.5		(3.4		)	2.1
Total intangible with finite lives	191.1		(98.8		)	92.3		141.4		(78.6		)	62.8
In-process research and development with indefinite lives	8.8		—			8.8		8.8		—			8.8
Total intangible assets	$	199.9	$	(98.8	)	$	101.1	$	150.2	$	(78.6	)	$	71.6

Carrying Amount of Indefinite-Lived Intangible Assets

The following table reflects the gross carrying amount and accumulated amortization of the Company’s intangible assets, net:

	September 28, 2018							September 29, 2017
(In millions)	Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount		Gross Carrying Amount		Accumulated Amortization			Net Carrying Amount
Technologies and patents	$	139.6	$	(73.9	)	$	65.7	$	102.0	$	(60.9	)	$	41.1
Customer contracts and supplier relationship	44.9		(19.1		)	25.8		33.9		(14.3		)	19.6
Other	6.6		(5.8		)	0.8		5.5		(3.4		)	2.1
Total intangible with finite lives	191.1		(98.8		)	92.3		141.4		(78.6		)	62.8
In-process research and development with indefinite lives	8.8		—			8.8		8.8		—			8.8
Total intangible assets	$	199.9	$	(98.8	)	$	101.1	$	150.2	$	(78.6	)	$	71.6

Future Amortization of Intangible Assets

As of September 28, 2018, the Company estimates that its remaining amortization expense for intangible assets with finite lives will be as follows (in millions):

Fiscal Years	Total
2019	$	18.2
2020	18.7
2021	14.1
2022	12.7
2023	12.0
Thereafter	16.6
Total remaining amortization	$	92.3