Condensed Consolidated Statement of Comprehensive Income (Unaudited) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Mar. 31, 2014	Mar. 31, 2013	Mar. 31, 2014	Mar. 31, 2013
Comprehensive income
Net income	$ 180.3	$ 175.9	$ 378.4	$ 337.3
Other comprehensive income (loss), net of tax:
Pension and other postretirement benefit plan adjustments (net of tax expense of $7.9, $12.0, $15.7 and $24.2)	14.5	21.8	29.1	43.7
Currency translation adjustments	5.1	(44.0)	14.3	(19.7)
Net change in unrealized gains and losses on cash flow hedges (net of tax expense of $0.4, $3.0, $0.8 and $2.5)	(2.0)	5.2	(1.3)	4.2
Other comprehensive income (loss)	17.6	(17.0)	42.1	28.2
Comprehensive income	$ 197.9	$ 158.9	$ 420.5	$ 365.5