Employee Benefit Obligations - Schedule of Pension and Other Post-retirement benefit plans (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accrued Benefit Cost / Funded Status	$ (88.3)	$ (116.6)
Defined Benefit Plan, Fair Value of Plan Assets	198.9	192.7
Accumulated other comprehensive income	309.0	220.9	$ (40.7)
Tax effects	(274.8)	(225.1)	(47.3)
Noncontrolling interest	(21.0)	11.0	$ 67.4
Defined Benefit Plan, Target Plan Asset Allocations			100.00%
Defined Contribution Plan, Employer Discretionary Contribution Amount	12.5	12.1	$ 11.7
Accumulated Defined Benefit Plans Adjustment
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accumulated other comprehensive income	(33.6)	(45.2)	(28.5)
Tax effects	3.6	12.1	1.3
Noncontrolling interest	21.5	30.4	18.6
Non-US [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accrued Benefit Cost / Funded Status	(77.5)	(95.6)
Employee benefit obligations	195.9	210.6	184.4
Service cost	3.4	2.6
Interest cost	4.4	5.7
Recognized net actuarial (gain) loss	(22.4)	36.0
Benefits paid	(8.6)	(6.1)
Defined Benefit Plan, Curtailments	(0.3)	0.0
Foreign currency exchange rate changes	8.8	(12.0)
Defined Benefit Plan, Fair Value of Plan Assets	118.4	115.0	116.9
Actual return on plan assets	(1.4)	8.9
Employer contributions	8.8	6.6
Foreign currency exchange rate changes	4.6	(11.3)
Non-US [Member] | Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	3.4	2.6	2.6
Interest cost	4.4	5.7	6.2
Recognized net actuarial (gain) loss	(3.9)	(0.8)	(1.3)
UNITED STATES
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Accrued Benefit Cost / Funded Status	(10.8)	(21.0)
Employee benefit obligations	91.3	98.7	93.2
Service cost	0.8	0.6
Interest cost	3.3	3.7
Recognized net actuarial (gain) loss	(4.4)	6.8
Benefits paid	(7.1)	(5.6)
Defined Benefit Plan, Curtailments	0.0	0.0
Foreign currency exchange rate changes	0.0	0.0
Defined Benefit Plan, Fair Value of Plan Assets	80.5	77.7	72.6
Actual return on plan assets	7.9	6.5
Employer contributions	2.0	4.2
Foreign currency exchange rate changes	0.0	0.0
UNITED STATES | Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Service cost	0.8	0.6	0.8
Interest cost	3.3	3.7	3.7
Recognized net actuarial (gain) loss	$ (1.6)	$ (0.7)	$ (0.2)
UNITED STATES | Minimum [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate			2.80%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Expected Return on Plan Assets			7.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase
UNITED STATES | Minimum [Member] | Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		3.10%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Expected Return on Plan Assets		7.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate		2.80%	3.40%	3.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets		7.00%	7.00%	7.30%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase
UNITED STATES | Maximum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate			3.50%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Expected Return on Plan Assets
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase
UNITED STATES | Maximum | Pension Plan [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		3.70%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Expected Return on Plan Assets		7.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate		4.00%	4.30%	4.20%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets		7.00%	7.30%	7.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase
Equity Securities | Minimum [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations			0.00%
Equity Securities | Maximum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations			60.00%
Fixed income securities | Minimum [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations			0.00%
Fixed income securities | Maximum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations			40.00%
Other plan asset investments | Minimum [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations			0.00%
Other plan asset investments | Maximum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Target Plan Asset Allocations			100.00%
Spectrum Brands [Member] | Non-US [Member] | Minimum [Member]
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		1.10%	1.00%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Expected Return on Plan Assets		1.10%	1.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate		1.00%	1.75%	2.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets		1.00%	1.80%	2.00%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase		1.40%	2.25%
Spectrum Brands [Member] | Non-US [Member] | Maximum
Defined Benefit Plans and Other Postretirement Benefit Plans Table Text Block [Line Items]
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate		13.50%	13.80%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Expected Return on Plan Assets		4.10%	3.70%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate		13.50%	13.81%	13.50%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets		3.70%	4.53%	5.30%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase		7.00%	7.00%