Consolidated Comprehensive Income Statements (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2013
Consolidated Comprehensive Income Statements [Abstract]
Tax effect on translation adjustments	$ 45.2	$ 36.5	$ (44.8)
Tax effect on net gain (loss) on derivatives	(16.0)	(13.6)	14.5
Tax effect on pension and postretirement benefits	(148.5)	(28.0)	154.8
Tax effect on derivatives reclassification adjustments	7.0	(1.9)	(5.5)
Tax effect on pension and post retirement benefits reclassification adjustments	$ 47.7	$ 40.0	$ 55.9