Divestitures (Summary Of Components Of Income From Discontinued Operations, Net Of Tax) (Details) - USD ($) $ in Millions	2 Months Ended	3 Months Ended
	Nov. 30, 2017	Dec. 30, 2018	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) Income from discontinued operations before income taxes		$ (92.9)	$ 506.0
Income tax (benefit) expense from discontinued operations		(10.1)	24.4
Net (loss) income from discontinued operations		(82.8)	481.6
Income from discontinued operations, net of tax attributable to noncontrolling interest			14.2
Net (loss) income from discontinued operations attributable to controlling interest		(82.8)	467.4
HRG Insurance Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) Income from discontinued operations before income taxes	$ 476.4
Discontinued Operations, Held-For-Sale [Member] | Global Battery And Lighting [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) Income from discontinued operations before income taxes		15.9	23.7
Discontinued Operations, Held-For-Sale [Member] | Global Auto Care [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) Income from discontinued operations before income taxes		$ (108.8)	5.9
Discontinued Operations, Held-For-Sale [Member] | HRG Insurance Operations [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
(Loss) Income from discontinued operations before income taxes			$ 476.4