Guarantor Statements - SB/RH (Statement Of Income) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 30, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Condensed Income Statements, Captions [Line Items]
Net sales									$ 3,802.1	$ 3,808.7	$ 3,705.4
Cost of goods sold									2,492.4	2,470.8	2,369.6
Restructuring and related charges									2.8	3.6	0.5
Gross profit	$ 334.7	$ 361.0	$ 305.5	$ 305.7	$ 346.9	$ 362.7	$ 306.0	$ 318.6	1,306.9	1,334.3	1,336.4
Selling									600.5	607.2	578.1
General and administrative									354.6	335.8	355.2
Research and development									43.5	44.6	44.6
Restructuring and related charges									62.9	72.0	37.0
Transaction related charges									21.8	30.2	17.7
Write-off from impairment of goodwill									116.0
Write-off from impairment of intangible assets									35.4	20.3	16.3
Total operating expenses									1,234.7	1,110.1	1,048.9
Operating (loss) income									72.2	224.2	287.5
Interest expense (income)									222.1	264.0	310.4
Other non-operating expense (income), net									43.9	(4.1)	5.0
(Loss) income from continuing operations before income taxes									(193.8)	(35.7)	(27.9)
Income tax (benefit) expense									(7.1)	(462.7)	(11.8)
Net (loss) income from continuing operations									(186.7)	427.0	(16.1)
Income (loss) from discontinued operations, net of tax									659.9	445.0	289.3
Net (loss) income									473.2	872.0	273.2
Net income (loss) attributable to non-controlling interest									1.3	103.7	167.2
Net income attributable to controlling interest	(118.3)	(25.9)	728.6	(112.5)	$ (115.8)	$ 405.6	$ (28.9)	$ 507.4	471.9	768.3	106.0
Parent [Member]
Condensed Income Statements, Captions [Line Items]
Net sales									1,794.5	1,839.8	1,662.9
Cost of goods sold									1,327.5	1,336.8	1,132.3
Restructuring and related charges									0.3
Gross profit									466.7	503.0	530.6
Selling									231.3	239.1	226.3
General and administrative									229.8	108.2	195.4
Research and development									23.2	23.3	23.5
Restructuring and related charges									46.6	59.7	28.1
Transaction related charges									27.4	23.5	14.3
Write-off from impairment of goodwill									61.0
Write-off from impairment of intangible assets									18.8
Total operating expenses									638.1	453.8	487.6
Operating (loss) income									(171.4)	49.2	43.0
Interest expense (income)									179.3	145.2	138.0
Other non-operating expense (income), net									(55.4)	(208.3)	(231.2)
(Loss) income from continuing operations before income taxes									(295.3)	112.3	136.2
Income tax (benefit) expense									(143.2)	(99.2)	(48.3)
Net (loss) income from continuing operations									(152.1)	211.5	184.5
Income (loss) from discontinued operations, net of tax									659.6	(30.7)	123.0
Net (loss) income									507.5	180.8	307.5
Net income (loss) attributable to non-controlling interest											(0.3)
Net income attributable to controlling interest									507.5	180.8	307.8
SB/RH [Member]
Condensed Income Statements, Captions [Line Items]
Net sales									3,802.1	3,808.7	3,705.4
Cost of goods sold									2,492.4	2,470.8	2,369.6
Restructuring and related charges									2.8	3.6	0.5
Gross profit	334.7	361.0	305.5	305.7					1,306.9	1,334.3	1,335.3
Selling									600.5	607.2	578.0
General and administrative									349.8	257.7	300.5
Research and development									43.5	44.6	44.6
Restructuring and related charges									62.9	72.0	37.0
Transaction related charges									21.8	30.2	17.7
Write-off from impairment of goodwill									116.0
Write-off from impairment of intangible assets									35.4	20.3	16.3
Total operating expenses									1,229.9	1,032.0	994.1
Operating (loss) income									77.0	302.3	341.2
Interest expense (income)									162.0	167.0	161.8
Other non-operating expense (income), net									44.2	5.2	5.8
(Loss) income from continuing operations before income taxes									(129.2)	130.1	173.6
Income tax (benefit) expense									10.7	(76.8)	(8.6)
Net (loss) income from continuing operations									(139.9)	206.9	182.2
Income (loss) from discontinued operations, net of tax									659.9	(24.0)	119.0
Net (loss) income									520.0	182.9	301.2
Net income (loss) attributable to non-controlling interest									1.3	1.4	1.3
Net income attributable to controlling interest	$ (119.0)	$ (30.1)	$ 770.2	$ (102.4)					518.7	181.5	299.9
Eliminations [Member]
Condensed Income Statements, Captions [Line Items]
Net sales									(1,417.2)	(1,354.4)	(790.5)
Cost of goods sold									(1,421.8)	(1,354.0)	(789.1)
Gross profit									4.6	(0.4)	(1.4)
Selling									(0.2)	(0.2)	(0.2)
General and administrative									(1.5)	(0.5)	(0.1)
Total operating expenses									(1.7)	(0.7)	(0.3)
Operating (loss) income									6.3	0.3	(1.1)
Interest expense (income)										0.1
Other non-operating expense (income), net									998.3	190.9	369.6
(Loss) income from continuing operations before income taxes									(992.0)	(190.7)	(370.7)
Income tax (benefit) expense									0.2	4.4	1.2
Net (loss) income from continuing operations									(992.2)	(195.1)	(371.9)
Income (loss) from discontinued operations, net of tax									80.3	(294.9)	(194.7)
Net (loss) income									(911.9)	(490.0)	(566.6)
Net income attributable to controlling interest									(911.9)	(490.0)	(566.6)
Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Net sales									1,517.9	1,363.1	1,002.1
Cost of goods sold									1,126.4	998.8	649.6
Restructuring and related charges									0.2	0.1	0.5
Gross profit									391.3	364.2	352.0
Selling									129.4	122.0	119.2
General and administrative									85.1	87.9	66.2
Research and development									10.0	8.9	10.0
Restructuring and related charges									2.0	1.6	1.2
Transaction related charges									(0.1)	4.2	0.5
Write-off from impairment of intangible assets									16.6	20.3	16.3
Total operating expenses									243.0	244.9	213.4
Operating (loss) income									148.3	119.3	138.6
Interest expense (income)									6.2	18.8	17.3
Other non-operating expense (income), net									(403.9)	21.1	(133.6)
(Loss) income from continuing operations before income taxes									546.0	79.4	254.9
Income tax (benefit) expense									108.5	(131.3)	22.7
Net (loss) income from continuing operations									437.5	210.7	232.2
Income (loss) from discontinued operations, net of tax									(72.9)	124.2	132.3
Net (loss) income									364.6	334.9	364.5
Net income attributable to controlling interest									364.6	334.9	364.5
Nonguarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Net sales									1,906.9	1,960.2	1,830.9
Cost of goods sold									1,460.3	1,489.2	1,376.8
Restructuring and related charges									2.3	3.5
Gross profit									444.3	467.5	454.1
Selling									240.0	246.3	232.7
General and administrative									36.4	62.1	39.0
Research and development									10.3	12.4	11.1
Restructuring and related charges									14.3	10.7	7.7
Transaction related charges									(5.5)	2.5	2.9
Write-off from impairment of goodwill									55.0
Total operating expenses									350.5	334.0	293.4
Operating (loss) income									93.8	133.5	160.7
Interest expense (income)									(23.5)	2.9	6.5
Other non-operating expense (income), net									(494.8)	1.5	1.0
(Loss) income from continuing operations before income taxes									612.1	129.1	153.2
Income tax (benefit) expense									45.2	149.3	15.8
Net (loss) income from continuing operations									566.9	(20.2)	137.4
Income (loss) from discontinued operations, net of tax									(7.1)	177.4	58.4
Net (loss) income									559.8	157.2	195.8
Net income (loss) attributable to non-controlling interest									1.3	1.4	1.6
Net income attributable to controlling interest									$ 558.5	$ 155.8	$ 194.2