Earnings Per Share - SBH (Schedule Of Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 29, 2020	Mar. 31, 2019	Mar. 29, 2020	Mar. 31, 2019
Numerator
Net loss from continuing operations attributable to controlling interest	$ (58.4)	$ (55.0)	$ (97.0)	$ (84.2)
Income from discontinued operations attributable to controlling interest	1.4	783.6	4.3	700.4
Net (loss) income attributable to controlling interest	$ (57.0)	$ 728.6	$ (92.7)	$ 616.2
Denominator
Weighted average shares outstanding - basic	45,100	51,800	46,400	52,600
Weighted average shares outstanding - diluted	45,100	51,800	46,400	52,600
Earnings per share
Basic earnings per share from continuing operations	$ (1.29)	$ (1.06)	$ (2.09)	$ (1.60)
Basic earnings per share from discontinued operations	0.03	15.13	0.09	13.32
Basic earnings per share	(1.26)	14.07	(2.00)	11.72
Diluted earnings per share from continuing operations	(1.29)	(1.06)	(2.09)	(1.60)
Diluted earnings per share from discontinued operations	0.03	15.13	0.09	13.32
Diluted earnings per share	$ (1.26)	$ 14.07	$ (2.00)	$ 11.72
Weighted average number of anti-dilutive shares excluded from denominator	100	100	100	100