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Debt - Additional Information (Detail) € in Millions, $ in Millions | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Mar. 31, 2018 USD ($) | Mar. 31, 2017 USD ($) | Mar. 31, 2018 USD ($) | Mar. 31, 2017 USD ($) | Mar. 31, 2018 EUR (€) | Sep. 30, 2017 USD ($) | Jan. 13, 2017 USD ($) | Feb. 27, 2015 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 5,404.2 |  | $ 5,404.2 |  |  | $ 5,801.9 |  |
Repayments of Other Debt |  |  | 994.4 | $ 165.2 |  |  |  |
Non-cash restructuring |  |  |  | 1.9 |  |  |  |
Payments of Debt Issuance Costs |  |  | 0.3 | 3.8 |  |  |  |
Deferred charges and other assets | 60.8 |  | 60.8 |  |  | 43.7 |  |
Interest Expense | 67.6 | $ 77.7 | 143.1 | 156.4 |  |  |  |
Debt Instrument, Unamortized Discount (Premium), Net | 22.4 |  | 22.4 |  |  | 20.7 |  |
Other Deferred Costs, Gross | 63.1 |  | 63.1 |  |  | $ 76.1 |  |
Amortization of debt discount |  |  | $ (2.3) | 0.9 |  |  |  |
Document Period End Date |  |  | Mar. 31, 2018 |  |  |  |  |
Margin Loan, due July 13, 2018 [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Security Owned and Pledged as Collateral, Fair Value | $ 4.2 |  | $ 4.2 |  |  |  |  |
Margin Loan, due July 13, 2018 [Member] | Secured Debt [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  |  |  |  | $ 150.0 |
Margin Loan, due July 13, 2018 [Member] | Interest Rate Cap [Member] | Secured Debt [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate | 4.70% |  | 4.70% |  | 4.70% | 3.70% | 2.35% |
HGI |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Employee Service Share-based Compensation, Cash Received from Exercise of Stock Options |  |  | $ 10.1 | $ 5.5 |  |  |  |
HGI | 7.875% Senior Secured Notes, due July 15, 2019 |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Two | $ 0.0 |  | $ 0.0 |  |  |  |  |
Redemption Price Of Debt Instrument To Percentage Of Principal Amount |  |  | 100.00% |  |  |  |  |
HGI | 7.875% Senior Secured Notes, due July 15, 2019 | Secured Debt [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term Debt, Maturities, Repayments of Principal in Year Five |  |  |  |  |  | $ 864.4 |  |
Long-term debt, interest rate | 0.00% |  | 0.00% |  | 0.00% | 7.875% |  |
HGI | Seven Point Seven Five Percent Senior Unsecured Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  | $ 890.0 |  |
Long-term debt, interest rate | 7.75% |  | 7.75% |  | 7.75% | 7.75% |  |
Long-term Debt and Capital Lease Obligations, Maturities, Repayments of Principal in Year Five | $ 890.0 |  | $ 890.0 |  |  |  |  |
Spectrum Brands [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Percentage Of Ownership Interest | 62.00% |  | 62.00% |  | 62.00% |  |  |
Spectrum Brands [Member] | Four Point Zero Percent Senior Notes [Member] | Secured Debt [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt, interest rate | 4.00% |  | 4.00% |  | 4.00% |  |  |
Spectrum Brands [Member] | Four Point Zero Percent Senior Notes [Member] | Unsecured Debt [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt, interest rate | 4.00% |  | 4.00% |  | 4.00% | 4.00% |  |
Spectrum Brands [Member] | Five Point Seven Five Percent Senior Notes Due July 15 2025 [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 1,000.0 |  | $ 1,000.0 |  |  | $ 1,000.0 |  |
Long-term debt, interest rate | 5.80% |  | 5.80% |  | 5.80% | 5.80% |  |
Spectrum Brands [Member] | CAD Term Loan, Due June 23, 2022 [Member] | Interest Rate Floor [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate | 0.75% |  | 0.75% |  | 0.75% |  |  |
Spectrum Brands [Member] | CAD Term Loan, Due June 23, 2022 [Member] | Minimum [Member] | ABR |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate |  |  |  |  |  | 1.75% |  |
Spectrum Brands [Member] | CAD Term Loan, Due June 23, 2022 [Member] | Maximum |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate | 3.50% |  | 3.50% |  | 3.50% |  |  |
Spectrum Brands [Member] | CAD Term Loan, Due June 23, 2022 [Member] | Maximum | ABR |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate | 2.50% |  | 2.50% |  | 2.50% |  |  |
Spectrum Brands [Member] | Revolving Credit Facility [Member] | Minimum [Member] | ABR |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate | 0.75% |  | 0.75% |  | 0.75% |  |  |
Spectrum Brands [Member] | Revolving Credit Facility [Member] | Minimum [Member] | Interest [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate | 1.75% |  | 1.75% |  | 1.75% |  |  |
Spectrum Brands [Member] | Revolving Credit Facility [Member] | Maximum | ABR |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate | 1.25% |  | 1.25% |  | 1.25% |  |  |
Spectrum Brands [Member] | Revolving Credit Facility [Member] | Maximum | Interest [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate | 2.25% |  | 2.25% |  | 2.25% |  |  |
Spectrum Brands [Member] | 6.625% Notes | Secured Debt [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 570.0 |  | $ 570.0 |  |  | $ 570.0 |  |
Long-term debt, interest rate | 6.60% |  | 6.60% |  | 6.60% | 6.60% |  |
Spectrum Brands [Member] | Six Point One Two Five Percentage Senior Notes [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 250.0 |  | $ 250.0 |  |  | $ 250.0 |  |
Long-term debt, interest rate | 6.10% |  | 6.10% |  | 6.10% | 6.10% |  |
Spectrum Brands [Member] | Term Loan, Due June 23, 2022 [Member] | Maximum | Interest Rate Cap [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate | 2.00% |  | 2.00% |  | 2.00% |  |  |
Spectrum Brands [Member] | Term Loan, Due June 23, 2022 [Member] | Maximum | ABR |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate | 1.00% |  | 1.00% |  | 1.00% |  |  |
Spectrum Brands [Member] | Abl Revolving Credit Facility [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of Credit Facility, Maximum Borrowing Capacity | $ 800.0 |  | $ 800.0 |  |  |  |  |
Line of Credit, Change in Borrowing Capacity | 100.0 |  | 100.0 |  |  |  |  |
Letters of Credit Outstanding, Amount | 18.0 |  | 18.0 |  |  |  |  |
Spectrum Brands [Member] | Abl Revolving Credit Facility [Member] | Revolving Credit Facility [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of Credit Facility, Fair Value of Amount Outstanding | $ 570.5 |  | $ 570.5 |  |  | $ 0.0 |  |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate | 4.30% |  | 4.30% |  | 4.30% | 0.00% |  |
Line of Credit Facility, Remaining Borrowing Capacity | $ 210.0 |  | $ 210.0 |  |  |  |  |
Spectrum Brands Foreign Subsidiaries [Member] | Abl Revolving Credit Facility [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Line of Credit Facility, Remaining Borrowing Capacity | 1.5 |  | 1.5 |  |  |  |  |
HGI Energy Holdings, LLC [Member] | Zero point seven one percent [Member] | Secured Debt [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  | $ 92.0 |  |
Long-term debt, interest rate |  |  |  |  |  | 1.50% |  |
Salus Capital Partners LLC | Unaffiliated long-term debt of consolidated variable-interest entity |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 77.0 |  | $ 77.0 |  |  | $ 28.9 |  |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate | 0.00% |  | 0.00% |  | 0.00% | 0.00% |  |
Salus Capital Partners LLC | Collateralized Loan Obligations [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  |  |  | $ 578.5
Euro Member Countries, Euro | Spectrum Brands [Member] | Four Point Zero Percent Senior Notes [Member] | Unsecured Debt [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 522.8 |  | $ 522.8 |  | € 425.0 | $ 500.9 |  |
United States of America, Dollars | Spectrum Brands [Member] | CAD Term Loan, Due June 23, 2022 [Member] | Secured Debt [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | 33.4 |  | 33.4 |  |  | 59.0 |  |
United States of America, Dollars | Spectrum Brands [Member] | Term Loan, Due June 23, 2022 [Member] | Secured Debt [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt | $ 1,237.9 |  | $ 1,237.9 |  |  | $ 1,244.2 |  |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate | 0.00% |  | 0.00% |  | 0.00% | 3.40% |  |
Canada, Dollars | Spectrum Brands [Member] | CAD Term Loan, Due June 23, 2022 [Member] | Secured Debt [Member] |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate | 5.20% |  | 5.20% |  | 5.20% | 4.90% |  |
FGL [Member] | Salus Capital Partners LLC |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term debt |  |  |  |  |  | $ 48.1 |  |
FGL [Member] | Salus Capital Partners LLC | Unaffiliated long-term debt of consolidated variable-interest entity |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |
Long-term Debt, Percentage Bearing Variable Interest, Percentage Rate | 0.00% |  | 0.00% |  | 0.00% | 0.00% |  |

X
- Definition The end date of the period reflected on the cover page if a periodic report. For all other reports and registration statements containing historical data, it is the date up through which that historical data is presented. If there is no historical data in the report, use the filing date. The format of the date is CCYY-MM-DD. + References No definition available. + Details
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- Definition Amount of noncash expense included in interest expense to amortize debt discount and premium associated with the related debt instruments. Excludes amortization of financing costs. Alternate captions include noncash interest expense. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 835 -SubTopic 30 -Section 45 -Paragraph 1A -URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.8) -URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688 + Details
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