Leases - Cash Flow (Details) - USD ($) $ in Millions	6 Months Ended
	Dec. 28, 2019	Dec. 29, 2018
Cash paid for amounts included in the measurement of lease liabilities:
Operating cash flows from operating leases	$ 206.6
Operating cash flows from finance leases	0.3
Financing cash flows from finance leases	0.4	$ 0.3
Non-cash transactions:
Right-of-use assets obtained in exchange for operating lease liabilities	86.1
Right-of-use assets obtained in exchange for finance lease liabilities	$ 0.0