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Restructuring and Other Charges (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Sep. 28, 2019	Dec. 29, 2018	Sep. 29, 2018	Sep. 28, 2019	Sep. 29, 2018
Restructuring Cost and Reserve [Line Items]
Proceeds from sale of property		$ 20.0		$ 20.8	$ 0.0
Fiscal 2019 Restructuring Plan
Restructuring Cost and Reserve [Line Items]
Cash-related restructuring charges	$ 9.5		$ 10.6	16.5	18.8
Cash-related Restructuring Charges, Cost Incurred to Date	85.9			85.9
Non-cash charges	6.3		4.5	8.1	5.8
Non-cash Charges, Cost Incurred to Date	36.0			36.0
Restructuring and non-cash charges	15.8		15.1	24.6	24.6
Restructuring and Related Cost, Cost Incurred to Date	121.9			121.9
Fiscal 2019 Restructuring Plan \| Severance and benefit costs
Restructuring Cost and Reserve [Line Items]
Cash-related restructuring charges	9.0		9.0	14.9	17.2
Cash-related Restructuring Charges, Cost Incurred to Date	75.1			75.1
Fiscal 2019 Restructuring Plan \| Lease termination and store closure costs
Restructuring Cost and Reserve [Line Items]
Cash-related restructuring charges	0.2		0.0	0.5	0.0
Cash-related Restructuring Charges, Cost Incurred to Date	2.3			2.3
Fiscal 2019 Restructuring Plan \| Other cash charges
Restructuring Cost and Reserve [Line Items]
Cash-related restructuring charges	0.3		1.6	1.1	1.6
Cash-related Restructuring Charges, Cost Incurred to Date	8.5			8.5
Fiscal 2019 Restructuring Plan \| Impairment of assets
Restructuring Cost and Reserve [Line Items]
Non-cash charges	2.3		4.5	3.5	5.8
Non-cash Charges, Cost Incurred to Date	13.8			13.8
Fiscal 2019 Restructuring Plan \| Inventory-related charges
Restructuring Cost and Reserve [Line Items]
Non-cash charges	0.4		0.0	1.0	0.0
Non-cash Charges, Cost Incurred to Date	7.0			7.0
Fiscal 2019 Restructuring Plan \| Accelerated stock-based compensation expense [Member]
Restructuring Cost and Reserve [Line Items]
Non-cash charges	3.6		0.0	3.6	0.0
Non-cash Charges, Cost Incurred to Date	3.6			3.6
Fiscal 2019 Restructuring Plan \| Loss on sale of property
Restructuring Cost and Reserve [Line Items]
Non-cash charges	0.0		$ 0.0	0.0	$ 0.0
Non-cash Charges, Cost Incurred to Date	$ 11.6			$ 11.6