Condensed Consolidated Statement of Comprehensive Income (Unaudited) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Comprehensive income
Net income	$ 216.9	$ 191.0	$ 621.1	$ 544.5
Other comprehensive income (loss), net of tax:
Pension and other postretirement benefit plan adjustments (net of tax expense of $12.6, $9.8, $37.8, $29.4)	23.8	18.5	72.1	55.3
Currency translation adjustments	24.9	(18.3)	(0.5)	(35.3)
Net change in unrealized gains and losses on cash flow hedges (net of tax (benefit) expense of ($1.0), ($1.3), $2.3, and ($5.4))	(4.4)	(2.8)	3.6	(13.7)
Net change in unrealized gains and losses on available-for-sale investments	0.0	0.0	(0.1)	0.0
Other comprehensive income (loss)	44.3	(2.6)	75.1	6.3
Comprehensive income	$ 261.2	$ 188.4	$ 696.2	$ 550.8