STATEMENTS OF CONSOLIDATED SHAREHOLDERS' EQUITY - USD ($) $ in Millions	Total	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Common Stock in Treasury [Member]	Total Equity Attributable to Common Shareholders [Member]	Noncontrolling Interests [Member]
Balance (in shares) at Sep. 30, 2014		57,439,911				22,884,001
Balance at Sep. 30, 2014	$ 806.5	$ 4.4	$ 134.1	$ 1,499.8	$ (74.1)	$ (757.7)	$ 806.5	$ 0.0
Net income	46.8			47.7			47.7	(0.9)
Consolidation of noncontrolling interest	10.9							10.9
Other comprehensive income (loss)	(66.7)				(66.7)		(66.7)
Dividends	(37.1)		0.5	(37.6)			(37.1)
Issuance of common stock (in shares)		8,133,722
Issuance of common stock	416.3		416.3				416.3
Treasury shares acquired (in shares)		(1,373,321)				1,373,321
Treasury shares acquired	(63.3)					$ (63.3)	(63.3)
Stock awards and option exercises (in shares)		965,584				(965,584)
Stock awards and option exercises	43.5		11.1			$ 32.4	43.5
Balance (in shares) at Sep. 30, 2015		65,165,896				23,291,738
Balance at Sep. 30, 2015	1,156.9	$ 4.4	562.0	1,509.9	(140.8)	$ (788.6)	1,146.9	10.0
Net income	122.8			124.1			124.1	(1.3)
Other comprehensive income (loss)	(28.3)				(28.3)		(28.3)
Dividends	(43.8)		0.5	(44.3)			(43.8)
Treasury shares acquired (in shares)		(148,203)				148,203
Treasury shares acquired	(8.4)					$ (8.4)	(8.4)
Stock awards and option exercises (in shares)		687,560				(687,560)
Stock awards and option exercises	36.7		13.4			$ 23.3	36.7
Balance (in shares) at Sep. 30, 2016		65,705,253				22,752,381
Balance at Sep. 30, 2016	1,235.9	$ 4.4	575.9	1,589.7	(169.1)	$ (773.7)	1,227.2	8.7
Net income	132.3			133.6			133.6	(1.3)
Other comprehensive income (loss)	59.1				59.1		59.1
Dividends	(46.6)		0.5	(47.1)			(46.6)
Treasury shares acquired (in shares)		(976,473.0)				976,473.0
Treasury shares acquired	(60.6)					$ (60.6)	(60.6)
Stock awards and option exercises (in shares)		1,085,014.0				(1,085,014.0)
Stock awards and option exercises	45.5		8.0			$ 37.5	45.5
Balance (in shares) at Sep. 30, 2017		65,813,794				22,643,840
Balance at Sep. 30, 2017	$ 1,365.6	$ 4.4	$ 584.4	$ 1,676.2	$ (110.0)	$ (796.8)	$ 1,358.2	$ 7.4