Condensed Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Mar. 31, 2016	Mar. 31, 2015	Mar. 31, 2016	Mar. 31, 2015
Comprehensive income
Net income	$ 168.0	$ 206.0	$ 353.5	$ 420.2
Other comprehensive income (loss), net of tax:
Pension and other postretirement benefit plan adjustments (net of tax expense of $9.8, $9.2, $19.6 and $18.4)	18.4	17.2	36.8	34.8
Currency translation adjustments	7.4	(67.7)	(17.0)	(160.6)
Net change in unrealized gains and losses on cash flow hedges (net of tax (benefit) expense of ($4.3), $8.7, ($4.1) and $7.6)	(12.5)	25.7	(10.9)	33.1
Other comprehensive income (loss)	13.3	(24.8)	8.9	(92.7)
Comprehensive income	$ 181.3	$ 181.2	$ 362.4	$ 327.5