Income Taxes - Income Tax Rate Reconciliation (Details) - USD ($) $ in Millions	12 Months Ended
	Jun. 29, 2019	Jun. 30, 2018	Jul. 01, 2017
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	$ 8.3	$ (10.0)	$ 63.0
US Inclusion of foreign earnings	16.0	1.0	1.9
Tax Reform E&P Inclusion	0.0	14.3	0.0
Valuation allowance	1.0	13.0	(26.0)
Foreign rate differential	8.3	(1.1)	(5.4)
AMT Tax Repeal	0.0	(4.5)	0.0
Permanent items	(2.7)	0.7	(11.1)
Reversal of previously accrued taxes	(1.2)	(1.2)	(0.2)
Withholding Taxes	1.5	0.7	0.4
Research and experimentation benefits and other tax credits	0.0	(0.7)	(1.4)
Other	0.3	0.7	0.2
Total income tax expense	$ 31.5	$ 12.9	$ 21.4