Condensed Consolidated Statement of Cash Flows (Unaudited) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2017	Dec. 31, 2016
Operating activities:
Net (loss) income	$ (236.4)	$ 214.7
Adjustments to arrive at cash provided by operating activities:
Depreciation	32.5	32.5
Amortization of intangible assets	7.1	7.9
Share-based compensation expense	8.6	10.7
Retirement benefit expense	28.3	43.0
Pension contributions	(11.6)	(13.5)
Net loss on disposition of property	0.0	0.3
Changes in assets and liabilities, excluding effects of acquisitions and foreign currency adjustments:
Receivables	(18.4)	6.0
Inventories	(19.2)	(27.9)
Accounts payable	(36.8)	(10.4)
Advance payments from customers and deferred revenue	27.9	16.8
Compensation and benefits	(77.0)	22.4
Income taxes	508.0	22.3
Other assets and liabilities	(0.3)	(14.0)
Cash provided by operating activities	212.7	310.8
Investing activities:
Capital expenditures	(34.1)	(39.4)
Acquisition of businesses, net of cash acquired	(9.9)	(1.1)
Purchases of investments	(275.2)	(191.3)
Proceeds from maturities of investments	234.5	193.9
Proceeds from sale of investments	51.5	0.0
Proceeds from sale of property	0.2	0.3
Cash used for investing activities	(33.0)	(37.6)
Financing activities:
Net issuance (repayment) of short-term debt	489.6	(40.0)
Repayment of long-term debt	(250.0)	0.0
Cash dividends	(107.3)	(97.5)
Purchases of treasury stock	(190.8)	(82.0)
Proceeds from the exercise of stock options	30.1	67.6
Other financing activities	1.8	0.0
Cash used for financing activities	(26.6)	(151.9)
Effect of exchange rate changes on cash	(17.0)	(53.1)
Increase in cash and cash equivalents	136.1	68.2
Cash and cash equivalents at beginning of period	1,410.9	1,526.4
Cash and cash equivalents at end of period	$ 1,547.0	$ 1,594.6