Guarantor Statements - SB/RH (Statement Of Income) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2017	Sep. 30, 2017	Jun. 30, 2017	Mar. 31, 2017	Dec. 31, 2016	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Condensed Income Statements, Captions [Line Items]
Net sales									$ 3,145.9	$ 3,009.5	$ 3,029.4
Cost of goods sold									1,979.5	1,815.4	1,791.5
Restructuring and related charges									12.8	18.1	0.2
Gross profit	$ 289.9	$ 354.6	$ 268.2	$ 240.9	$ 310.0	$ 320.3	$ 307.7	$ 239.1	1,153.6	1,177.1	1,246.6
Selling									492.3	473.8	477.4
General and administrative									323.9	318.9	346.0
Research and development									28.3	27.2	27.0
Acquisition and integration related charges									14.3	15.6	34.1
Restructuring and related charges									80.0	42.3	13.8
Impairment of goodwill									92.5		10.7
Impairment of intangible assets									20.3	16.3	2.7
Total operating expenses									1,051.6	894.1	911.7
Operating (loss) income									102.0	283.0	334.9
Interest expense									264.6	309.9	334.5
Other non-operating (income) expense, net									(6.3)	4.2	(8.8)
(Loss) income from continuing operations before income taxes									(156.3)	(31.1)	9.2
Income tax (benefit) expense									(460.7)	38.1	(58.4)
Net income (loss) from continuing operations									304.4	(69.2)	67.6
Income (loss) from discontinued operations, net of tax									567.6	342.4	(101.5)
Net income (loss)	(116.2)	432.6	(23.4)	578.9	24.0	39.8	(51.4)	260.8	872.0	273.2	(33.9)
Net income attributable to non-controlling interest									103.7	167.2	164.9
Net income (loss) attributable to controlling interest	$ (115.8)	$ 405.5	$ (28.9)	$ 507.4	$ (26.2)	$ 2.1	$ (82.1)	$ 212.2	768.3	106.0	(198.8)
Parent [Member]
Condensed Income Statements, Captions [Line Items]
Net sales									1,389.2	1,164.2	1,108.4
Cost of goods sold									1,022.5	782.5	740.2
Gross profit									366.7	381.7	368.2
Selling									179.2	169.4	163.2
General and administrative									110.6	167.4	147.0
Research and development									7.5	7.9	8.5
Acquisition and integration related charges									6.2	14.2	20.1
Restructuring and related charges									59.3	28.2	0.1
Total operating expenses									362.8	387.1	338.9
Operating (loss) income									3.9	(5.4)	29.3
Interest expense									145.1	137.9	151.1
Other non-operating (income) expense, net									(215.5)	(222.2)	(372.2)
(Loss) income from continuing operations before income taxes									74.3	78.9	250.4
Income tax (benefit) expense									(7.8)	(54.8)	(23.0)
Net income (loss) from continuing operations									82.1	133.7	273.4
Income (loss) from discontinued operations, net of tax									98.7	173.8	76.7
Net income (loss)									180.8	307.5	350.1
Net income (loss) attributable to controlling interest									180.8	307.5	350.1
SB/RH [Member]
Condensed Income Statements, Captions [Line Items]
Net sales									3,145.9	3,009.5	3,029.4
Cost of goods sold									1,979.5	1,815.4	1,791.5
Restructuring and related charges									12.8	18.1	0.2
Gross profit									1,153.6	1,176.0	1,237.7
Selling									492.3	473.8	477.4
General and administrative									245.9	264.2	259.3
Research and development									28.3	27.2	27.0
Acquisition and integration related charges									14.3	15.6	34.1
Restructuring and related charges									80.0	42.3	13.8
Impairment of goodwill									92.5
Impairment of intangible assets									20.3	16.3	2.7
Total operating expenses									973.6	839.4	814.3
Operating (loss) income									180.0	336.6	423.4
Interest expense									167.6	161.3	182.0
Other non-operating (income) expense, net									2.9	4.9	4.7
(Loss) income from continuing operations before income taxes									9.5	170.4	236.7
Income tax (benefit) expense									(74.8)	41.3	(39.0)
Net income (loss) from continuing operations									84.3	129.1	275.7
Income (loss) from discontinued operations, net of tax									98.6	172.1	76.6
Net income (loss)									182.9	301.2	352.3
Net income attributable to non-controlling interest									1.4	1.3	0.4
Net income (loss) attributable to controlling interest									181.5	299.9	351.9
Eliminations [Member]
Condensed Income Statements, Captions [Line Items]
Net sales									(1,884.0)	(1,221.4)	(1,149.3)
Cost of goods sold									(1,886.2)	(1,214.6)	(1,148.3)
Gross profit									2.2	(6.8)	(1.0)
Selling									(0.5)	(1.5)	(0.7)
General and administrative									(0.3)	0.1	(0.1)
Total operating expenses									(0.8)	(1.4)	(0.8)
Operating (loss) income									3.0	(5.4)	(0.2)
Other non-operating (income) expense, net									255.1	271.8	503.6
(Loss) income from continuing operations before income taxes									(252.1)	(277.2)	(503.8)
Income tax (benefit) expense									0.5	(0.8)	(2.6)
Net income (loss) from continuing operations									(252.6)	(276.4)	(501.2)
Income (loss) from discontinued operations, net of tax									(237.4)	(290.2)	(128.5)
Net income (loss)									(490.0)	(566.6)	(629.7)
Net income (loss) attributable to controlling interest									(490.0)	(566.6)	(629.7)
Guarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Net sales									2,448.0	1,963.8	1,974.0
Cost of goods sold									1,912.6	1,393.0	1,371.1
Restructuring and related charges									9.3	18.1
Gross profit									526.1	552.7	602.9
Selling									177.7	175.8	180.1
General and administrative									105.8	83.1	95.6
Research and development									12.0	10.5	10.0
Acquisition and integration related charges									4.3	1.3	4.7
Restructuring and related charges									10.8	7.6	10.1
Impairment of goodwill									92.5
Impairment of intangible assets									20.3	16.3	2.7
Total operating expenses									423.4	294.6	303.2
Operating (loss) income									102.7	258.1	299.7
Interest expense									20.9	18.7	19.9
Other non-operating (income) expense, net									(35.9)	(44.6)	(131.7)
(Loss) income from continuing operations before income taxes									117.7	284.0	411.5
Income tax (benefit) expense									(100.2)	60.3	40.0
Net income (loss) from continuing operations									217.9	223.7	371.5
Income (loss) from discontinued operations, net of tax									117.0	140.8	62.4
Net income (loss)									334.9	364.5	433.9
Net income (loss) attributable to controlling interest									334.9	364.5	433.9
Nonguarantor Subsidiaries [Member]
Condensed Income Statements, Captions [Line Items]
Net sales									1,192.7	1,102.9	1,096.3
Cost of goods sold									930.6	854.5	828.5
Restructuring and related charges									3.5		0.2
Gross profit									258.6	248.4	267.6
Selling									135.9	130.1	134.8
General and administrative									29.8	13.6	16.8
Research and development									8.8	8.8	8.5
Acquisition and integration related charges									3.8	0.1	9.3
Restructuring and related charges									9.9	6.5	3.6
Total operating expenses									188.2	159.1	173.0
Operating (loss) income									70.4	89.3	94.6
Interest expense									1.6	4.7	11.0
Other non-operating (income) expense, net									(0.8)	(0.1)	5.0
(Loss) income from continuing operations before income taxes									69.6	84.7	78.6
Income tax (benefit) expense									32.7	36.6	(53.4)
Net income (loss) from continuing operations									36.9	48.1	132.0
Income (loss) from discontinued operations, net of tax									120.3	147.7	66.0
Net income (loss)									157.2	195.8	198.0
Net income attributable to non-controlling interest									1.4	1.3	0.4
Net income (loss) attributable to controlling interest									$ 155.8	$ 194.5	$ 197.6