Divestitures (Narrative) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions				3 Months Ended
	Dec. 11, 2018	Nov. 15, 2018	Nov. 30, 2017	Dec. 30, 2018	Dec. 31, 2017	Sep. 30, 2018	Jan. 15, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Income tax expense (benefit)				$ (3.4)	$ (120.5)
FGL Merger [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Reclassification of accumulated other comprehensive income to income from discontinued operations				445.9
Income tax expense (benefit)				5.9
Global Battery And Lighting [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Depreciation and amortization expense				0.0	8.3
Transaction costs associated with the divestiture				10.6	2.5
Global Auto Care [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Depreciation and amortization expense				1.5	$ 3.9
Transaction costs associated with the divestiture				5.8
Fidelity And Guaranty Life [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Estimate fair value less cost to sell held for sale assets						$ 402.2
Fidelity And Guaranty Life [Member] | FGL Merger [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Share price			$ 31.10
Transaction costs associated with the divestiture			$ 1,448.3
Front Street RE Cayman Ltd [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Estimate fair value less cost to sell held for sale assets						$ 19.0
Home And Personal Care [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Depreciation and amortization expense				29.0
Transaction costs associated with the divestiture				$ 4.7
Energizer [Member] | Global Battery And Lighting [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Purchase price							$ 2,000.0
Energizer [Member] | Global Battery And Lighting [Member] | Maximum [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Potential downward adjustment, percentage	75.00%
Potential upward adjustment, percentage	25.00%
Energizer [Member] | Global Battery And Lighting [Member] | Downward Adjustment Equal To 75% [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Purchase price adjustment	$ 600.0
Energizer [Member] | Global Battery And Lighting [Member] | Upward Adjustment Equal To 25% [Member] | Maximum [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Purchase price adjustment	$ 200.0
Energizer [Member] | Global Auto Care [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Purchase price		$ 1,250.0
Purchase price, cash		$ 937.5
Energizer [Member] | Global Auto Care [Member] | Common Stock [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Stock consideration, shares		5.3
Stock consideration, value		$ 312.5
CF Entities [Member] | Front Street RE Cayman Ltd [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Transaction costs associated with the divestiture			65.0
Amount of purchase price deposited in escrow			$ 6.5