Consolidated Statements of Shareholders' Equity - USD ($) shares in Millions, $ in Millions		Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income [Member]	Retained Earnings [Member]
Balance Beginning at Jul. 01, 2017		$ 925.5	$ 1.0	$ 855.5	$ 2.4	$ 66.6
Balance Beginning, shares at Jul. 01, 2017			100.8
Issuance of common stock under stock-based compensation plans		(21.0)		(21.0)
Issuance of common stock under stock-based compensation plans, shares			2.0
Net income		134.3				134.3
Interest rate swaps		4.6			4.6
Stock-based compensation expense		18.0		18.0
Balance Ending at Mar. 31, 2018		1,061.4	$ 1.0	852.5	7.0	200.9
Balance Ending, shares at Mar. 31, 2018			102.8
Balance Beginning at Dec. 30, 2017		1,015.5	$ 1.0	842.9	4.4	167.2
Balance Beginning, shares at Dec. 30, 2017			102.3
Issuance of common stock under stock-based compensation plans		6.1		6.1
Issuance of common stock under stock-based compensation plans, shares			0.5
Net income		33.7				33.7
Interest rate swaps		2.6			2.6
Stock-based compensation expense		3.5		3.5
Balance Ending at Mar. 31, 2018		1,061.4	$ 1.0	852.5	7.0	200.9
Balance Ending, shares at Mar. 31, 2018			102.8
Balance Beginning at Jun. 30, 2018		$ 1,135.3	$ 1.0	861.2	8.3	264.8
Balance Beginning, shares at Jun. 30, 2018		103.2	103.2
Issuance of common stock under stock-based compensation plans		$ (1.3)		(1.3)
Issuance of common stock under stock-based compensation plans, shares			0.9
Net income		103.6				103.6
Interest rate swaps		(5.9)			(5.9)
Stock-based compensation expense		11.8		11.8
Common stock repurchased		(9.3)	$ (9.3)	(9.3)
Common stock repurchased, shares			(0.3)
Change in accounting principle	[1]				0.9	(0.9)
Balance Ending at Mar. 30, 2019		$ 1,234.2	$ 1.0	862.4	3.3	367.5
Balance Ending, shares at Mar. 30, 2019		103.8	103.8
Balance Beginning at Dec. 29, 2018		$ 1,205.1	$ 1.0	863.2	5.7	335.2
Balance Beginning, shares at Dec. 29, 2018			103.8
Issuance of common stock under stock-based compensation plans		(0.5)		(0.5)
Issuance of common stock under stock-based compensation plans, shares			0.1
Net income		32.3				32.3
Interest rate swaps		(2.4)			(2.4)
Stock-based compensation expense		3.8		3.8
Common stock repurchased		(4.1)	$ (4.1)	(4.1)
Common stock repurchased, shares			(0.1)
Balance Ending at Mar. 30, 2019		$ 1,234.2	$ 1.0	$ 862.4	$ 3.3	$ 367.5
Balance Ending, shares at Mar. 30, 2019		103.8	103.8

[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. Refer to Note 3 for further discussion.