Consolidated Statement of Cash Flows - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Operating activities:
Net income (loss)	$ 80.3	$ (236.4)
Adjustments to arrive at cash provided by operating activities:
Depreciation	29.3	32.5
Amortization of intangible assets	6.6	7.1
Change in fair value of investments	212.7	0.0
Share-based compensation expense	11.0	8.6
Retirement benefit expense	17.2	28.3
Pension contributions	(6.1)	(11.6)
Net loss on disposition of property	1.3	0.0
Changes in assets and liabilities, excluding effects of acquisitions and foreign currency adjustments:
Receivables	(6.1)	(18.4)
Inventories	(52.4)	(19.2)
Accounts payable	(31.2)	(36.8)
Contract liabilities	26.9	27.9
Compensation and benefits	(85.4)	(77.0)
Income taxes	12.2	508.0
Other assets and liabilities	(4.3)	(0.3)
Cash provided by operating activities	212.0	212.7
Investing activities:
Capital expenditures	(42.0)	(34.1)
Acquisition of businesses, net of cash acquired	0.0	(9.9)
Purchases of investments	(2.8)	(275.2)
Proceeds from maturities of investments	185.6	234.5
Proceeds from sale of investments	0.0	51.5
Proceeds from sale of property	0.1	0.2
Cash provided by (used for) investing activities	140.9	(33.0)
Financing activities:
Net issuance of short-term debt	80.3	489.6
Repayment of long-term debt	0.0	(250.0)
Cash dividends	(116.9)	(107.3)
Purchases of treasury stock	(295.1)	(190.8)
Proceeds from the exercise of stock options	4.0	30.1
Other financing activities	0.0	1.8
Cash used for financing activities	(327.7)	(26.6)
Effect of exchange rate changes on cash	(11.7)	(17.0)
Increase in cash and cash equivalents	13.5	136.1
Cash and cash equivalents at beginning of period	618.8	1,410.9
Cash and cash equivalents at end of period	$ 632.3	$ 1,547.0