EARNINGS PER SHARE – SBH (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Sep. 30, 2021	Jul. 04, 2021	Apr. 04, 2021	Jan. 03, 2021	Sep. 30, 2020	Jun. 28, 2020	Mar. 29, 2020	Dec. 29, 2019	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Numerator
Net income (loss) from continuing operations attributable to controlling interest	$ 6.0	$ (1.8)	$ (3.7)	$ 14.7	$ (9.6)	$ 126.1	$ (107.6)	$ (61.6)	$ 15.1	$ (52.7)	$ (303.0)
Net income from discontinued operations attributable to controlling interest	44.2	32.5	40.4	57.4	55.0	19.0	50.7	25.8	174.5	150.5	797.5
Net income attributable to controlling interest	$ 50.2	$ 30.7	$ 36.7	$ 72.1	$ 45.4	$ 145.1	$ (56.9)	$ (35.8)	$ 189.6	$ 97.8	$ 494.5
Denominator
Weighted average shares outstanding - basic (in shares)									42.7	44.7	50.7
Dilutive shares (in shares)									0.5	0.0	0.0
Weighted average shares outstanding - diluted (in shares)									43.2	44.7	50.7
Earnings per share
Basic earnings per share from continuing operations (in dollars per share)	$ 0.14	$ (0.04)	$ (0.09)	$ 0.34	$ (0.22)	$ 2.93	$ (2.39)	$ (1.29)	$ 0.35	$ (1.18)	$ (5.98)
Basic earnings per share from discontinued operations (in dollars per share)	1.04	0.76	0.95	1.34	1.27	0.44	1.13	0.54	4.09	3.37	15.74
Basic earnings per share (in dollars per share)	1.18	0.72	0.86	1.68	1.05	3.37	(1.26)	(0.75)	4.44	2.19	9.76
Diluted earnings per share from continuing operations (in dollars per share)	0.14	(0.04)	(0.09)	0.34	(0.22)	2.92	(2.39)	(1.29)	0.35	(1.18)	(5.98)
Diluted earnings per share from discontinued operations (in dollars per share)	1.02	0.76	0.95	1.34	1.27	0.44	1.13	0.54	4.04	3.37	15.74
Diluted earnings per share (in dollars per share)	$ 1.16	$ 0.72	$ 0.86	$ 1.68	$ 1.05	$ 3.36	$ (1.26)	$ (0.75)	$ 4.39	$ 2.19	$ 9.76
Weighted average number of anti-dilutive shares excluded from denominator (in shares)									0.0	0.2	0.2