Condensed Consolidated Statements of Comprehensive Income (Loss) (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Statement of Comprehensive Income [Abstract]
Net Income	$ 5.7	$ 45.0	$ 63.2	$ 71.4
Other Comprehensive (Loss) Income, net of tax (Note 7):
Available-for-sale securities and hedges	(2.4)	(3.3)	7.6	(5.0)
Foreign currency translation adjustment	38.1	(20.1)	12.6	(17.7)
Change in pension and postretirement defined benefit plans	0.6	0.9	2.7	2.2
Total Other Comprehensive Income (Loss), net of tax	36.3	(22.5)	22.9	(20.5)
Total Comprehensive Income	42.0	22.5	86.1	50.9
Less: Comprehensive loss attributable to noncontrolling interests	(0.3)	(0.3)	(1.0)	(1.0)
Total Comprehensive Income Attributable to Common Shareholders	$ 42.3	$ 22.8	$ 87.1	$ 51.9