Condensed Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Millions	6 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Operating activities:
Net income	$ 404.2	$ 353.5
Adjustments to arrive at cash provided by operating activities:
Depreciation	65.4	71.7
Amortization of intangible assets	15.6	14.7
Share-based compensation expense	20.2	20.6
Retirement benefit expense	86.1	78.2
Pension contributions	(28.5)	(21.2)
Net loss on disposition of property	0.1	0.5
Excess income tax benefit from share-based compensation	0.0	(1.2)
Changes in assets and liabilities, excluding effects of acquisitions and foreign currency adjustments:
Receivables	(16.4)	13.5
Inventories	(16.6)	(33.8)
Accounts payable	20.0	3.3
Advance payments from customers and deferred revenue	33.2	26.5
Compensation and benefits	51.2	(73.7)
Income taxes	(7.7)	(58.0)
Other assets and liabilities	(15.0)	4.7
Cash provided by operating activities	611.8	399.3
Investing activities:
Capital expenditures	(67.4)	(52.6)
Acquisition of businesses, net of cash acquired	(1.1)	(21.1)
Purchases of investments	721.6	590.6
Proceeds from maturities of investments	422.1	397.6
Proceeds from sale of investments	6.1	0.0
Proceeds from sale of property	0.4	0.2
Cash used for investing activities	(361.5)	(266.5)
Financing activities:
Net (repayment) issuance of short-term debt	(75.1)	277.6
Cash dividends	(195.5)	(190.4)
Purchases of treasury stock	(185.0)	(257.4)
Proceeds from the exercise of stock options	136.9	12.8
Excess income tax benefit from share-based compensation	0.0	1.2
Cash used for financing activities	(318.7)	(156.2)
Effect of exchange rate changes on cash	(17.2)	(7.6)
Decrease in cash and cash equivalents	(85.6)	(31.0)
Cash and cash equivalents at beginning of period	1,526.4	1,427.3
Cash and cash equivalents at end of period	$ 1,440.8	$ 1,396.3