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Divestitures (Summary Of Components Of Income From Discontinued Operations) (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
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Net (loss) income from discontinued operations                 $ 567.6 $ 342.4 $ (101.5)
Net (loss) income from discontinued operations attributable to controlling interest $ 35.5 $ 17.4 $ 13.9 $ 500.8 $ 47.3 $ 36.0 $ (43.6) $ 302.8 538.2 227.1 (153.0)
Discontinued Operations, Held-For-Sale [Member] | Global Batteries & Appliances [Member]                      
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]                      
Net sales                 1,981.0 1,997.9 2,010.3
Cost of goods sold                 1,307.1 1,299.2 1,328.0
Gross profit                 673.9 698.7 682.3
Operating expenses                 505.0 465.5 443.8
Operating income                 168.9 233.2 238.5
Interest expense                 55.0 50.2 68.0
Other non-operating expense, net                 3.5 0.8 3.9
Income from discontinued operations before income taxes                 110.4 182.2 166.6
Income tax (benefit) expense                 11.8 10.1 90.0
Net (loss) income from discontinued operations                 98.6 172.1 76.6
Net income (loss) from discontinued operations attributable to non-controlling interest                 0.3 1.3 (0.5)
Net (loss) income from discontinued operations attributable to controlling interest                 $ 98.3 $ 170.8 $ 77.1