Consolidated Statement of Shareowners' Equity - USD ($) $ in Millions		Total	Common stock	Additional paid-in capital	Retained earnings	Accumulated other comprehensive income/(loss)	Common stock in treasury, at cost
Beginning balance at Sep. 30, 2016		$ 1,990.1	$ 181.4	$ 1,588.2	$ 5,668.4	$ (1,538.8)	$ (3,909.1)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		825.7			825.7
Other comprehensive income (loss)		359.6				359.6
Common stock issued (including share based compensation impact)		216.2		49.8			166.4
Treasury stock/other		(337.3)					(337.3)
Cash dividends declared	[1]	(390.7)			(390.7)
Ending balance at Sep. 30, 2017		2,663.6	181.4	1,638.0	6,103.4	(1,179.2)	(4,080.0)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		535.5			535.5
Other comprehensive income (loss)		237.3				237.3
Common stock issued (including share based compensation impact)		122.4		43.4			79.0
Treasury stock/other		(1,500.5)					(1,500.5)
Cash dividends declared	[1]	(440.8)			(440.8)
Ending balance at Sep. 30, 2018		1,617.5	181.4	1,681.4	6,198.1	(941.9)	(5,501.5)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income		695.8			695.8
Other comprehensive income (loss)		(546.1)				(546.1)
Common stock issued (including share based compensation impact)		90.7		27.7			63.0
Treasury stock/other		(1,000.0)					(1,000.0)
Cash dividends declared	[1]	(459.8)			(459.8)
Ending balance at Sep. 30, 2019		$ 404.2	$ 181.4	$ 1,709.1	$ 6,440.2	$ (1,488.0)	$ (6,438.5)

[1] Cash dividends were $3.88 per share in 2019; $3.51 per share in 2018; and $3.04 per share in 2017