Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions		Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive (Loss) Income [Member]	Retained Earnings [Member]
Balance Beginning at Jun. 30, 2018		$ 1,135.3	$ 1.0	$ 861.2	$ 8.3	$ 264.8
Balance Beginning, shares at Jun. 30, 2018			103,200,000
Issuance of common stock under stock-based compensation plans		(2.3)		(2.3)
Issuance of common stock under stock-based compensation plans, shares			400,000
Net income		28.2				28.2
Interest rate swaps		0.3			0.3
Stock-based compensation expense		3.8		3.8
Change in accounting principle	[1]				0.9	(0.9)
Balance Ending at Sep. 29, 2018		1,165.3	$ 1.0	862.7	9.5	292.1
Balance Ending, shares at Sep. 29, 2018			103,600,000
Balance Beginning at Jun. 29, 2019		$ 1,298.2	$ 1.0	866.7	(0.2)	430.7
Balance Beginning, shares at Jun. 29, 2019		103,800,000	103,800,000
Issuance of common stock under stock-based compensation plans		$ (4.5)		(4.5)
Issuance of common stock under stock-based compensation plans, shares			400,000
Net income		36.1				36.1
Interest rate swaps		(1.1)			(1.1)
Stock-based compensation expense		4.4		4.4
Balance Ending at Sep. 28, 2019		$ 1,333.1	$ 1.0	$ 866.6	$ (1.3)	$ 466.8
Balance Ending, shares at Sep. 28, 2019		104,200,000	104,200,000

[1] As of the beginning of fiscal 2019, the Company elected to early adopt the provisions of ASU 2017-12, Derivatives and Hedging (Topic 815): Targeted Improvements to Accounting for Hedging Activities.