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Income Taxes - Income Tax Rate Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Jul. 01, 2017	Jul. 02, 2016	Jun. 27, 2015
Reconciliation of the Company's income tax expense (benefit) at the federal statutory rate to the income tax expense (benefit) at the effective tax rate
Income tax expense (benefit) computed at federal statutory rate	$ 65.3	$ (16.1)	$ (36.8)
Goodwill impairment	0.0	19.4	0.0
Intraperiod allocation	0.0	(20.7)	0.0
Foreign rate differential	(6.6)	(2.0)	(2.3)
Valuation allowance	(27.4)	18.2	56.7
Research and experimentation benefits and other tax credits	(1.4)	(1.1)	(0.9)
Reversal of previously accrued taxes	(0.2)	0.0	(0.8)
Permanent items	(9.1)	6.7	8.0
Other	0.7	0.1	2.2
Total income tax expense	$ 21.3	$ 4.5	$ 26.1

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Amount of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to increase (decrease) in the valuation allowance for deferred tax assets.

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Amount of the difference between reported income tax expense (benefit) and expected income tax expense (benefit) computed by applying the domestic federal statutory income tax rates to pretax income (loss) from continuing operations attributable to foreign income tax expense (benefit).

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