QUARTERLY RESULTS OF OPERATIONS (UNAUDITED) (Unaudited Consolidated Quarterly Results Of Operations) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Jun. 24, 2020	Mar. 25, 2020	Dec. 25, 2019	Sep. 25, 2019	Jun. 26, 2019	Mar. 27, 2019	Dec. 26, 2018	Sep. 26, 2018	Jun. 24, 2020	Jun. 26, 2019	Jun. 27, 2018
Quarterly Financial Information Disclosure [Abstract]
Revenues	$ 563.2	$ 860.0	$ 869.3	$ 786.0	$ 834.1	$ 839.3	$ 790.7	$ 753.8	$ 3,078.5	$ 3,217.9	$ 3,135.4
Income (loss) before income taxes	(68.1)	27.2	29.0	16.8	49.2	55.5	35.0	32.1	4.9	171.8	170.2
Net income (loss)	$ (49.2)	$ 30.8	$ 27.9	$ 14.9	$ 46.7	$ 49.8	$ 32.0	$ 26.4	$ 24.4	$ 154.9	$ 125.9
Basic net income (loss) per share	$ (1.20)	$ 0.83	$ 0.75	$ 0.40	$ 1.25	$ 1.33	$ 0.84	$ 0.65	$ 0.64	$ 4.04	$ 2.75
Diluted net income (loss) per share	$ (1.20)	$ 0.81	$ 0.73	$ 0.39	$ 1.22	$ 1.31	$ 0.83	$ 0.64	$ 0.63	$ 3.96	$ 2.72
Basic weighted average shares outstanding	40.9	37.2	37.4	37.5	37.5	37.5	38.1	40.4	38.2	38.3	45.7
Diluted weighted average shares outstanding	40.9	37.8	38.1	38.1	38.3	38.1	38.8	41.1	38.9	39.1	46.3