Guarantor Statements (Statement Of Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Mar. 31, 2019	Mar. 31, 2019	Mar. 31, 2018	Mar. 31, 2019	Mar. 31, 2018
Condensed Statement of Income Captions [Line Items]
Net income (loss)		$ 729.6	$ (23.4)	$ 617.4	$ 555.5
Net unrealized loss on foreign currency translation		(2.3)	24.2	(23.1)	22.2
Unrealized gain (loss) on derivative instruments		4.9	(11.6)	13.3	(9.8)
Defined benefit pension gain (loss)			(0.5)	1.5	(0.4)
Deconsolidation of discontinued operations		21.9		21.9	(445.9)
Net change to derive comprehensive income for the periods		24.5	12.1	13.6	(421.8)
Comprehensive income (loss)		754.1	(11.3)	631.0	133.7
Comprehensive loss attributable to non-controlling interest			5.6		79.6
Comprehensive income (loss) attributable to controlling interest		754.1	(16.9)	631.0	54.1
Parent [Member]
Condensed Statement of Income Captions [Line Items]
Net income (loss)	$ 765.8			662.4
Net unrealized loss on foreign currency translation	(2.2)			(23.1)
Unrealized gain (loss) on derivative instruments	4.9			13.3
Defined benefit pension gain (loss)				1.5
Deconsolidation of discontinued operations	21.8			21.8
Net change to derive comprehensive income for the periods	24.5			13.5
Comprehensive income (loss)	790.3			675.9
Comprehensive income (loss) attributable to controlling interest	790.3			675.9
SB/RH [Member]
Condensed Statement of Income Captions [Line Items]
Net income (loss)	771.2	771.2		669.1
Net unrealized loss on foreign currency translation	(2.3)	(2.3)		(23.1)
Unrealized gain (loss) on derivative instruments	4.9	4.9		13.3
Defined benefit pension gain (loss)				1.5
Deconsolidation of discontinued operations	21.9	21.9		21.9
Net change to derive comprehensive income for the periods	24.5	24.5		13.6
Comprehensive income (loss)	795.7	795.7		682.7
Comprehensive income (loss) attributable to controlling interest	795.7	$ 795.7		682.7
Eliminations [Member]
Condensed Statement of Income Captions [Line Items]
Net income (loss)	(1,040.4)			(1,011.7)
Net unrealized loss on foreign currency translation	8.1			51.0
Unrealized gain (loss) on derivative instruments	4.2			(2.0)
Defined benefit pension gain (loss)				(2.2)
Deconsolidation of discontinued operations	(43.5)			(43.5)
Net change to derive comprehensive income for the periods	(31.2)			3.3
Comprehensive income (loss)	(1,071.6)			(1,008.4)
Comprehensive income (loss) attributable to controlling interest	(1,071.6)			(1,008.4)
Guarantor Subsidiaries [Member]
Condensed Statement of Income Captions [Line Items]
Net income (loss)	495.2			441.2
Net unrealized loss on foreign currency translation	(2.2)			(23.8)
Unrealized gain (loss) on derivative instruments	(2.1)			1.0
Defined benefit pension gain (loss)				1.1
Deconsolidation of discontinued operations	21.8			21.8
Net change to derive comprehensive income for the periods	17.5			0.1
Comprehensive income (loss)	512.7			441.3
Comprehensive income (loss) attributable to controlling interest	512.7			441.3
Nonguarantor Subsidiaries [Member]
Condensed Statement of Income Captions [Line Items]
Net income (loss)	550.6			577.2
Net unrealized loss on foreign currency translation	(6.0)			(27.2)
Unrealized gain (loss) on derivative instruments	(2.1)			1.0
Defined benefit pension gain (loss)				1.1
Deconsolidation of discontinued operations	21.8			21.8
Net change to derive comprehensive income for the periods	13.7			(3.3)
Comprehensive income (loss)	564.3			573.9
Comprehensive income (loss) attributable to controlling interest	$ 564.3			$ 573.9
Three Month Periods Ended April 1, 2018 [Member] | Parent [Member]
Condensed Statement of Income Captions [Line Items]
Net income (loss)			27.5
Net unrealized loss on foreign currency translation			24.2
Unrealized gain (loss) on derivative instruments			(11.6)
Defined benefit pension gain (loss)			(0.5)
Net change to derive comprehensive income for the periods			12.1
Comprehensive income (loss)			39.6
Comprehensive income (loss) attributable to controlling interest			39.6
Three Month Periods Ended April 1, 2018 [Member] | SB/RH [Member]
Condensed Statement of Income Captions [Line Items]
Net income (loss)			26.2
Net unrealized loss on foreign currency translation			24.2
Unrealized gain (loss) on derivative instruments			(11.6)
Defined benefit pension gain (loss)			(0.5)
Net change to derive comprehensive income for the periods			12.1
Comprehensive income (loss)			38.3
Comprehensive loss attributable to non-controlling interest			0.3
Comprehensive income (loss) attributable to controlling interest			38.0
Three Month Periods Ended April 1, 2018 [Member] | Eliminations [Member]
Condensed Statement of Income Captions [Line Items]
Net income (loss)			(221.3)
Net unrealized loss on foreign currency translation			(49.3)
Unrealized gain (loss) on derivative instruments			0.2
Defined benefit pension gain (loss)			1.6
Net change to derive comprehensive income for the periods			(47.5)
Comprehensive income (loss)			(268.8)
Comprehensive income (loss) attributable to controlling interest			(268.8)
Three Month Periods Ended April 1, 2018 [Member] | Guarantor Subsidiaries [Member]
Condensed Statement of Income Captions [Line Items]
Net income (loss)			177.2
Net unrealized loss on foreign currency translation			24.2
Unrealized gain (loss) on derivative instruments			(0.1)
Defined benefit pension gain (loss)			(0.8)
Net change to derive comprehensive income for the periods			23.3
Comprehensive income (loss)			200.5
Comprehensive income (loss) attributable to controlling interest			200.5
Three Month Periods Ended April 1, 2018 [Member] | Nonguarantor Subsidiaries [Member]
Condensed Statement of Income Captions [Line Items]
Net income (loss)			42.8
Net unrealized loss on foreign currency translation			25.1
Unrealized gain (loss) on derivative instruments			(0.1)
Defined benefit pension gain (loss)			(0.8)
Net change to derive comprehensive income for the periods			24.2
Comprehensive income (loss)			67.0
Comprehensive loss attributable to non-controlling interest			0.3
Comprehensive income (loss) attributable to controlling interest			$ 66.7
Six Month Periods Ended April 1, 2018 [Member] | Parent [Member]
Condensed Statement of Income Captions [Line Items]
Net income (loss)					193.6
Net unrealized loss on foreign currency translation					22.2
Unrealized gain (loss) on derivative instruments					(9.8)
Defined benefit pension gain (loss)					(0.3)
Net change to derive comprehensive income for the periods					12.1
Comprehensive income (loss)					205.7
Comprehensive income (loss) attributable to controlling interest					205.7
Six Month Periods Ended April 1, 2018 [Member] | SB/RH [Member]
Condensed Statement of Income Captions [Line Items]
Net income (loss)					195.6
Net unrealized loss on foreign currency translation					22.2
Unrealized gain (loss) on derivative instruments					(9.8)
Defined benefit pension gain (loss)					(0.4)
Net change to derive comprehensive income for the periods					12.0
Comprehensive income (loss)					207.6
Comprehensive loss attributable to non-controlling interest					0.5
Comprehensive income (loss) attributable to controlling interest					207.1
Six Month Periods Ended April 1, 2018 [Member] | Eliminations [Member]
Condensed Statement of Income Captions [Line Items]
Net income (loss)					(384.4)
Net unrealized loss on foreign currency translation					(45.1)
Unrealized gain (loss) on derivative instruments					(8.4)
Defined benefit pension gain (loss)					1.3
Net change to derive comprehensive income for the periods					(52.2)
Comprehensive income (loss)					(436.6)
Comprehensive income (loss) attributable to controlling interest					(436.6)
Six Month Periods Ended April 1, 2018 [Member] | Guarantor Subsidiaries [Member]
Condensed Statement of Income Captions [Line Items]
Net income (loss)					283.9
Net unrealized loss on foreign currency translation					22.2
Unrealized gain (loss) on derivative instruments					4.2
Defined benefit pension gain (loss)					(0.7)
Net change to derive comprehensive income for the periods					25.7
Comprehensive income (loss)					309.6
Comprehensive income (loss) attributable to controlling interest					309.6
Six Month Periods Ended April 1, 2018 [Member] | Nonguarantor Subsidiaries [Member]
Condensed Statement of Income Captions [Line Items]
Net income (loss)					102.5
Net unrealized loss on foreign currency translation					22.9
Unrealized gain (loss) on derivative instruments					4.2
Defined benefit pension gain (loss)					(0.7)
Net change to derive comprehensive income for the periods					26.4
Comprehensive income (loss)					128.9
Comprehensive loss attributable to non-controlling interest					0.5
Comprehensive income (loss) attributable to controlling interest					$ 128.4