Consolidated Statement of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Operating activities:
Net income	$ 535.5	$ 825.7	$ 729.7
Adjustments to arrive at cash provided by operating activities:
Depreciation	136.4	138.7	143.3
Amortization of intangible assets	28.2	30.2	28.9
Change in fair value of investments	(90.0)	0.0	0.0
Share-based compensation expense	38.5	38.5	40.5
Retirement benefit expense	114.0	176.0	157.1
Pension contributions	(50.3)	(254.9)	(44.3)
Deferred income taxes	170.5	33.8	(70.5)
Gain on sale of business	0.0	(60.8)	0.0
Net loss on disposition of property	2.5	0.1	1.7
Excess income tax benefit from share-based compensation	0.0	0.0	(3.3)
Changes in assets and liabilities, excluding effects of acquisitions and foreign currency adjustments:
Receivables	(91.7)	(53.0)	(18.9)
Inventories	(37.4)	(30.4)	4.6
Accounts payable	67.2	81.1	32.3
Advance payments from customers and deferred revenue	12.9	21.3	11.7
Compensation and benefits	22.4	124.7	(81.1)
Income taxes	426.7	(22.2)	(8.9)
Other assets and liabilities	14.6	(14.8)	24.5
Cash provided by operating activities	1,300.0	1,034.0	947.3
Investing activities:
Capital expenditures	(125.5)	(141.7)	(116.9)
Acquisition of businesses, net of cash acquired	(9.9)	(1.1)	(139.1)
Purchases of investments	(1,296.9)	(1,444.2)	(1,070.7)
Proceeds from maturities of investments	1,106.1	912.6	886.3
Proceeds from sale of investments	155.3	62.6	0.0
Proceeds from sale of business	0.0	94.0	0.0
Proceeds from sale of property	0.5	1.1	0.4
Cash used for investing activities	(170.4)	(516.7)	(440.0)
Financing activities:
Net issuance (repayment) of short-term debt	200.6	(98.2)	448.6
Repayment of long-term debt	(250.0)	0.0	0.0
Cash dividends	(440.8)	(390.7)	(378.2)
Purchases of treasury stock	(1,482.3)	(342.6)	(507.6)
Proceeds from the exercise of stock options	81.8	181.9	36.2
Excess income tax benefit from share-based compensation	0.0	0.0	3.3
Other financing activities	1.8	0.0	0.0
Cash used for financing activities	(1,888.9)	(649.6)	(397.7)
Effect of exchange rate changes on cash	(32.8)	16.8	(10.5)
(Decrease) increase in cash and cash equivalents	(792.1)	(115.5)	99.1
Cash and cash equivalents at beginning of year	1,410.9	1,526.4	1,427.3
Cash and cash equivalents at end of year	$ 618.8	$ 1,410.9	$ 1,526.4