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Income Taxes - Income Tax Rate Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Jul. 02, 2016
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 (benefit) expense computed at federal statutory rate	$ (9.1)	$ 65.3	$ (16.1)
Tax Reform E&P Inclusion	14.3
AMT Tax Repeal	(4.5)
Goodwill impairment	0.0	0.0	19.4
Intraperiod allocation	0.0	0.0	(20.7)
Foreign rate differential	(0.5)	(6.6)	(2.0)
Valuation allowance	12.0	(27.4)	18.2
Research and experimentation benefits and other tax credits	(0.7)	(1.4)	(1.1)
Reversal of previously accrued taxes	(1.2)	(0.2)	0.0
Permanent items	1.7	(9.1)	6.7
Withholding Taxes	0.7	0.4	0.3
Other	0.7	0.3	(0.2)
Total income tax expense	$ 13.4	$ 21.3	$ 4.5

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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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