Loss Per Share - Summary (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended								12 Months Ended
	Jun. 30, 2019	Mar. 31, 2019	Dec. 30, 2018	Sep. 23, 2018	Jun. 24, 2018	Mar. 25, 2018	Dec. 24, 2017	Sep. 24, 2017	Jun. 30, 2019	Jun. 24, 2018	Jun. 25, 2017
Earnings Per Share [Abstract]
Net loss from continuing operations	$ (34.6)	$ (22.3)	$ (0.2)	$ (0.8)	$ (28.9)	$ (9.9)	$ 32.0	$ (9.6)	$ (57.9)	$ (16.4)	$ (88.1)
Net income attributable to noncontrolling interest	(0.1)	0.1	0.0	0.0	0.0	0.1	0.0	0.0	0.0	0.1	0.0
Loss from continuing operations attributable to controlling interest									(57.9)	(16.5)	(88.1)
Net loss from discontinued operations	(99.2)	(205.4)	(2.3)	(10.3)	(4.4)	(230.4)	(18.3)	(10.4)	(317.2)	(263.5)	(10.0)
Net loss attributable to controlling interest	$ (133.7)	$ (227.8)	$ (2.5)	$ (11.1)	$ (33.3)	$ (240.4)	$ 13.7	$ (20.0)	$ (375.1)	$ (280.0)	$ (98.1)
Weighted average number of common shares - basic and diluted (in thousands)									103,576	99,530	98,487
Loss per share - basic:
Continuing operations attributable to controlling interest - basic (USD per share)	$ (0.33)	$ (0.22)	$ 0	$ (0.01)	$ (0.29)	$ (0.10)	$ 0.32	$ (0.10)	$ (0.56)	$ (0.17)	$ (0.89)
Discontinued operations - basic (USD per share)									(3.06)	(2.65)	(0.10)
Loss per share - diluted:
Continuing operations attributable to controlling interest - diluted (USD per share)	$ (0.33)	$ (0.22)	$ 0	$ (0.01)	$ (0.29)	$ (0.10)	$ 0.32	$ (0.10)	(0.56)	(0.17)	(0.89)
Discontinued operations - diluted (USD per share)									$ (3.06)	$ (2.65)	$ (0.10)