Revenue Recognition - Dual Reporting - Consolidated Balance Sheet (Details) - USD ($) $ in Millions	Sep. 30, 2019	Oct. 01, 2018	Sep. 30, 2018
Current assets:
Receivables	$ 1,178.7	$ 1,194.6	$ 1,190.1
Other current assets	173.3	167.0	149.3
Deferred income taxes	364.1	180.8	179.6
Other assets	132.2	107.6	96.2
Current liabilities:
Contract liabilities	275.6	268.6
Customer returns, rebates and incentives	199.2	211.0	206.6
Other current liabilities	227.9	232.2	226.6
Shareowners’ equity:
Retained earnings	6,440.2	6,204.2	6,198.1
Accumulated Other Comprehensive Income (Loss), Net of Tax	(1,488.0)		(941.9)
Impact of Adoption | Accounting Standards Update 2014-09
Current assets:
Receivables	(3.0)	4.5
Other current assets	(15.9)	17.7
Deferred income taxes	(1.2)	1.2
Other assets	(10.2)	11.4
Current liabilities:
Contract liabilities	(19.7)	18.7
Customer returns, rebates and incentives	(1.7)	4.4
Other current liabilities	(4.0)	5.6
Shareowners’ equity:
Retained earnings	(5.3)	$ 6.1
Accumulated Other Comprehensive Income (Loss), Net of Tax	0.4
Balances without adoption of ASC 606
Current assets:
Receivables	1,175.7		1,190.1
Other current assets	157.4		149.3
Deferred income taxes	362.9		179.6
Other assets	122.0		96.2
Current liabilities:
Contract liabilities	255.9		249.9
Customer returns, rebates and incentives	197.5		206.6
Other current liabilities	223.9		226.6
Shareowners’ equity:
Retained earnings	6,434.9		$ 6,198.1
Accumulated Other Comprehensive Income (Loss), Net of Tax	$ (1,487.6)