Loss Per Share - Summary (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Dec. 29, 2019	Dec. 30, 2018	Dec. 29, 2019	Dec. 30, 2018
Earnings Per Share [Abstract]
Net loss from continuing operations	$ (52.5)	$ (0.2)	$ (90.3)	$ (1.0)
Net income attributable to noncontrolling interest	0.3	0.0	0.3	0.0
Loss from continuing operations attributable to controlling interest	(52.8)	(0.2)	(90.6)	(1.0)
Net loss from discontinued operations	0.0	(2.3)	0.0	(12.6)
Net loss attributable to controlling interest	$ (52.8)	$ (2.5)	$ (90.6)	$ (13.6)
Weighted average shares - basic and diluted (shares)	107,925	102,871	107,519	102,396
Loss per share - basic and diluted:
Continuing operations attributable to controlling interest (USD per share)	$ (0.49)	$ 0	$ (0.84)	$ (0.01)
Discontinued operations (USD per share)	$ 0	$ (0.02)	$ 0	$ (0.12)