Consolidated Statement of Cash Flows - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2019
Operating activities:
Net income	$ 1,344.3	$ 1,023.2	$ 695.8
Adjustments to arrive at cash provided by operating activities:
Depreciation	123.9	122.5	126.2
Amortization of intangible assets	65.9	50.2	26.0
Change in fair value of investments	(397.4)	(153.9)	368.5
Share-based compensation expense	51.7	46.1	43.1
Retirement benefit expense	155.1	129.5	70.7
Pension contributions	(35.8)	(84.1)	(30.9)
Deferred income taxes	(184.1)	(65.7)	(29.0)
Net loss (gain) on disposition of property	0.5	(12.4)	1.8
Settlement of interest rate derivatives	(28.0)	22.0	(35.7)
Changes in assets and liabilities, excluding effects of acquisitions and foreign currency adjustments:
Receivables	(138.1)	(9.0)	(10.4)
Inventories	(202.8)	30.4	(4.9)
Accounts payable	184.8	(5.0)	14.5
Contract liabilities	104.4	43.3	12.1
Compensation and benefits	174.6	(44.6)	(45.2)
Income taxes	57.2	(11.8)	(18.8)
Other assets and liabilities	(15.2)	39.8	(1.8)
Cash provided by operating activities	1,261.0	1,120.5	1,182.0
Investing activities:
Capital expenditures	(120.3)	(113.9)	(132.8)
Acquisition of businesses, net of cash acquired	(2,488.5)	(550.9)	(20.7)
Purchases of investments	(13.6)	(10.7)	(5.1)
Proceeds from maturities of investments	0.6	6.0	312.8
Proceeds from sale of investments	0.0	37.9	66.3
Proceeds from sale of property	0.4	14.9	4.5
Other investing activities	(5.2)	(1.3)	0.0
Cash (used for) provided by investing activities	(2,626.6)	(618.0)	225.0
Financing activities:
Net issuance (repayment) of short-term debt	275.9	0.0	(551.0)
Issuance of short-term debt, net of issuance costs	211.4	423.6	0.0
Issuance of long-term debt, net of discount and issuance costs	1,485.6	0.0	987.6
Repayment of short-term debt	(2.5)	(400.0)	0.0
Repayment of long-term debt	0.0	(300.7)	0.0
Cash dividends	(497.1)	(472.8)	(459.8)
Purchases of treasury stock	(299.7)	(264.2)	(1,009.0)
Proceeds from the exercise of stock options	154.6	214.4	47.4
Other financing activities	(30.4)	0.8	(1.1)
Cash provided by (used for) financing activities	1,297.8	(798.9)	(985.9)
Effect of exchange rate changes on cash	16.8	8.4	(21.5)
(Decrease) increase in cash, cash equivalents, and restricted cash	(51.0)	(288.0)	399.6
Cash, cash equivalents, and restricted cash at beginning of year	730.4	1,018.4	618.8
Cash, cash equivalents, and restricted cash at end of year	679.4	730.4	1,018.4
Components of cash, cash equivalents, and restricted cash
Cash and cash equivalents	662.2	704.6	1,018.4
Restricted cash, noncurrent (Other assets)	17.2	25.8	0.0
Total cash, cash equivalents, and restricted cash	$ 679.4	$ 730.4	$ 1,018.4