CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) $ in Millions	Total	Common Stock and Additional Paid-In Capital	Accumulated Deficit	Accumulated Other Comprehensive Income
Balance at the beginning of the period at Jul. 01, 2017	$ 803.5	$ 70,184.6	$ (69,288.6)	$ (92.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(19.4)		(19.4)
Other comprehensive income	37.4			37.4
Shares issued under employee stock plans, net of tax effects	(6.4)	(6.4)
Stock-based compensation	22.8	22.8
Repurchases of common stock	(40.9)		(40.9)
Reacquisition of 2033 notes equity component	(20.9)	(20.9)
Balance at the end of the period at Mar. 31, 2018	776.1	70,180.7	(69,349.5)	(55.1)
Balance at the beginning of the period at Dec. 30, 2017	770.3	70,174.0	(69,328.9)	(74.8)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(10.7)		(10.7)
Other comprehensive income	19.7			19.7
Shares issued under employee stock plans, net of tax effects	(0.1)	(0.1)
Stock-based compensation	7.6	7.6
Repurchases of common stock	(9.9)		(9.9)
Reacquisition of 2033 notes equity component	(0.8)	(0.8)
Balance at the end of the period at Mar. 31, 2018	776.1	70,180.7	(69,349.5)	(55.1)
Balance at the beginning of the period at Jun. 30, 2018	734.9	70,216.4	(69,378.6)	(102.9)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(7.1)		(7.1)
Other comprehensive income	(12.3)			(12.3)
Shares issued under employee stock plans, net of tax effects	(7.1)	(7.1)
Stock-based compensation	28.7	28.7
Repurchases of common stock	(9.0)		(9.0)
Reacquisition of 2033 notes equity component	0.2	0.2
Balance at the end of the period at Mar. 30, 2019	728.3	70,238.2	(69,394.7)	(115.2)
Balance at the beginning of the period at Dec. 29, 2018	710.1	70,227.0	(69,389.5)	(127.4)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net loss	(4.8)		(4.8)
Other comprehensive income	12.2			12.2
Shares issued under employee stock plans, net of tax effects	0.4	0.4
Stock-based compensation	10.8	10.8
Repurchases of common stock	(0.4)		(0.4)
Balance at the end of the period at Mar. 30, 2019	$ 728.3	$ 70,238.2	$ (69,394.7)	$ (115.2)