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Restructuring and Other Charges (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Jun. 30, 2018	Jul. 01, 2017	Apr. 01, 2017
Fiscal 2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Cash-related restructuring charges	$ 8.2
Non-cash charges	1.3
Restructuring and non-cash charges	9.5
Fiscal 2019 Restructuring Plan \| Severance and benefit costs
Restructuring Cost and Reserve [Line Items]
Cash-related restructuring charges	8.2
Fiscal 2019 Restructuring Plan \| Impairment of assets
Restructuring Cost and Reserve [Line Items]
Non-cash charges	1.3
Way Forward Plan
Restructuring Cost and Reserve [Line Items]
Cash-related restructuring charges	6.5	$ 26.6
Cash-related Restructuring Charges, Cost Incurred to Date	374.1
Non-cash charges	0.0	10.4
Non-cash Charges, Cost Incurred to Date	456.8
Restructuring and non-cash charges	6.5	37.0
Restructuring and Related Cost, Cost Incurred to Date	830.9
Way Forward Plan \| Severance and benefit costs
Restructuring Cost and Reserve [Line Items]
Cash-related restructuring charges	6.2	11.7
Cash-related Restructuring Charges, Cost Incurred to Date	227.9
Way Forward Plan \| Lease termination and store closure costs
Restructuring Cost and Reserve [Line Items]
Cash-related restructuring charges	0.1	12.2
Cash-related Restructuring Charges, Cost Incurred to Date	120.6
Way Forward Plan \| Other cash charges
Restructuring Cost and Reserve [Line Items]
Cash-related restructuring charges	0.2	2.7
Cash-related Restructuring Charges, Cost Incurred to Date	25.6
Way Forward Plan \| Impairment of assets
Restructuring Cost and Reserve [Line Items]
Non-cash charges	0.0	9.7
Non-cash Charges, Cost Incurred to Date	250.6
Way Forward Plan \| Inventory-related charges
Restructuring Cost and Reserve [Line Items]
Non-cash charges	0.0	0.7
Non-cash Charges, Cost Incurred to Date	205.5
Way Forward Plan \| Inventory-related charges \| Reduction of inventory out of current liquidation channels [Member]
Restructuring Cost and Reserve [Line Items]
Non-cash charges			$ 155.2
Way Forward Plan \| Accelerated stock-based compensation expense [Member]
Restructuring Cost and Reserve [Line Items]
Non-cash charges	0.0	$ 0.0
Non-cash Charges, Cost Incurred to Date	$ 0.7