Consolidated Statement of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2017
Operating activities:
Net income	$ 695.8	$ 535.5	$ 825.7
Adjustments to arrive at cash provided by operating activities:
Depreciation	126.2	136.4	138.7
Amortization of intangible assets	26.0	28.2	30.2
Change in fair value of investments	368.5	(90.0)	0.0
Share-based compensation expense	43.1	38.5	38.5
Retirement benefit expense	70.7	114.0	176.0
Pension contributions	(30.9)	(50.3)	(254.9)
Deferred income taxes	(29.0)	170.5	33.8
Gain on sale of business	0.0	0.0	(60.8)
Net loss on disposition of property	1.8	2.5	0.1
Settlement of treasury locks	(35.7)	0.0	0.0
Changes in assets and liabilities, excluding effects of acquisitions and foreign currency adjustments:
Receivables	(10.4)	(91.7)	(53.0)
Inventories	(4.9)	(37.4)	(30.4)
Accounts payable	14.5	67.2	81.1
Contract liabilities	12.1	12.9	21.3
Compensation and benefits	(45.2)	22.4	124.7
Income taxes	(18.8)	426.7	(22.2)
Other assets and liabilities	(1.8)	14.6	(14.8)
Cash provided by operating activities	1,182.0	1,300.0	1,034.0
Investing activities:
Capital expenditures	(132.8)	(125.5)	(141.7)
Acquisition of businesses, net of cash acquired	(20.7)	(9.9)	(1.1)
Purchases of investments	(5.1)	(1,296.9)	(1,444.2)
Proceeds from maturities of investments	312.8	1,106.1	912.6
Proceeds from sale of investments	66.3	155.3	62.6
Proceeds from sale of business	0.0	0.0	94.0
Proceeds from sale of property	4.5	0.5	1.1
Cash provided by (used for) investing activities	225.0	(170.4)	(516.7)
Financing activities:
Net (repayment) issuance of short-term debt	(551.0)	200.6	(98.2)
Issuance of long-term debt, net of discount and issuance costs	987.6	0.0	0.0
Repayment of long-term debt	0.0	(250.0)	0.0
Cash dividends	(459.8)	(440.8)	(390.7)
Purchases of treasury stock	(1,009.0)	(1,482.3)	(342.6)
Proceeds from the exercise of stock options	47.4	81.8	181.9
Other financing activities	(1.1)	1.8	0.0
Cash used for financing activities	(985.9)	(1,888.9)	(649.6)
Effect of exchange rate changes on cash	(21.5)	(32.8)	16.8
Increase (decrease) in cash and cash equivalents	399.6	(792.1)	(115.5)
Cash and cash equivalents at beginning of year	618.8	1,410.9	1,526.4
Cash and cash equivalents at end of year	$ 1,018.4	$ 618.8	$ 1,410.9