Consolidated Statement of Cash Flows - USD ($) $ in Millions	6 Months Ended
	Mar. 31, 2022	Mar. 31, 2021
Operating activities:
Net income	$ 288.3	$ 1,000.7
Adjustments to arrive at cash provided by operating activities:
Depreciation	64.9	60.2
Amortization of intangible assets	56.5	29.7
Change in fair value of investments	133.1	(581.3)
Share-based compensation expense	31.2	24.4
Retirement benefit expense	58.0	60.1
Pension contributions	(15.8)	(18.7)
Net loss on disposition of property	0.3	0.2
Changes in assets and liabilities, excluding effects of acquisitions and foreign currency adjustments:
Receivables	(160.3)	(185.8)
Inventories	(136.4)	(88.4)
Accounts payable	70.2	119.1
Contract liabilities	79.4	63.6
Compensation and benefits	(145.0)	62.6
Income taxes	(229.7)	33.3
Other assets and liabilities	(15.9)	15.7
Cash provided by operating activities	78.8	595.4
Investing activities:
Capital expenditures	(82.0)	(52.1)
Acquisition of businesses, net of cash acquired	(16.4)	(283.0)
Purchases of investments	(47.6)	(0.2)
Other investing activities	1.3	(1.4)
Cash used for investing activities	(144.7)	(336.7)
Financing activities:
Net issuance of short-term debt	341.3	0.0
Repayment of short-term debt	(210.0)	(0.4)
Cash dividends	(260.2)	(248.7)
Purchases of treasury stock	(51.2)	(176.9)
Proceeds from the exercise of stock options	42.0	97.0
Other financing activities	(4.4)	(10.1)
Cash used for financing activities	(142.5)	(339.1)
Effect of exchange rate changes on cash	(10.8)	17.7
Decrease in cash, cash equivalents, and restricted cash	(219.2)	(62.7)
Cash, cash equivalents, and restricted cash at beginning of period	679.4	730.4
Cash, cash equivalents, and restricted cash at end of period	460.2	667.7
Components of cash, cash equivalents, and restricted cash:
Cash and cash equivalents	443.0	641.9
Restricted cash, current (Other current assets)	8.6	6.9
Restricted cash, noncurrent (Other assets)	8.6	18.9
Total cash, cash equivalents, and restricted cash	$ 460.2	$ 667.7