Goodwill and Other Intangible Assets (Tables)

3 Months Ended

Sep. 29, 2018

Goodwill and Intangible Assets Disclosure [Abstract]

The following table presents the changes in goodwill by our reportable segments during the three months ended September 29, 2018 (in millions):



	Optical Communications		Commercial Lasers		Total
Balance as of beginning of period	$	5.9	$	5.4	$	11.3
Foreign currency translation adjustment	—		—		—
Balance as of end of period	$	5.9	$	5.4	$	11.3

The following table presents the changes in goodwill by our reportable segments during the three months ended September 30, 2017 (in millions):



	Optical Communications		Commercial Lasers			Total
Balance as of beginning of period	$	5.9	$	5.5		$	11.4
Foreign currency translation adjustment	0.2		(0.1		)	0.1
Balance as of end of period	$	6.1	$	5.4		$	11.5

Acquired developed technology and other intangibles

The following tables present details of our acquired developed technologies and other intangibles as of the periods presented (in millions):



September 29, 2018:	Gross Carrying Amount		Accumulated Amortization			Net
Acquired developed technologies	$	105.6	$	(99.3	)	$	6.3
Other intangibles	7.0		(7.0		)	—
Total intangible assets	$	112.6	$	(106.3	)	$	6.3



June 30, 2018:	Gross Carrying Amount		Accumulated Amortization			Net
Acquired developed technologies	$	105.5	$	(98.5	)	$	7.0
Other intangibles	7.0		(7.0		)	—
Total intangible assets	$	112.5	$	(105.5	)	$	7.0

Details of amortization expense

The following table presents details of amortization for the periods presented (in millions):



	Three Months Ended
	September 29, 2018		September 30, 2017
Cost of sales	$	0.8	$	0.8
Total	$	0.8	$	0.8

Estimated future amortization expense

Based on the carrying amount of acquired developed technologies as of September 29, 2018, and assuming no future impairment of the underlying assets, the estimated future amortization is as follows (in millions):



Fiscal Years
Remainder of 2019	$	2.2
2020	2.9
2021	0.5
2022	0.5
Thereafter	0.2
Total amortization	$	6.3