CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2018
Operating activities:
Net income	$ 324.5	$ 579.4	$ 471.9
Depreciation and amortization	104.2	115.2	120.5
Stock-based compensation expense	29.3	29.0	26.7
Deferred income taxes	22.4	10.4	(3.1)
(Gain) loss on sale of assets	(11.8)	(3.3)	1.1
Foreign currency transaction (gains) losses	(0.6)	0.8	1.4
Debt extinguishment	8.5		10.3
Other non-cash adjustments	(0.6)	0.3	2.3
Changes in operating assets and liabilities:
Receivables, net	266.7	173.2	(129.5)
Unbilled receivables, net	65.8	(239.8)	(97.5)
Inventories, net	(246.7)	(111.0)	(38.6)
Other current assets	(17.4)	(5.8)	11.2
Accounts payable	(222.5)	12.8	124.3
Customer advances	112.3	(90.2)	(68.4)
Payroll-related obligations	(32.3)	(7.6)	1.7
Income taxes payable	(52.1)	36.2	26.2
Other current liabilities	(37.1)	45.6	(33.9)
Other long-term assets and liabilities	14.7	23.1	9.7
Total changes in operating assets and liabilities	(148.6)	(163.5)	(194.8)
Net cash provided by operating activities	327.3	568.3	436.3
Investing activities:
Additions to property, plant and equipment	(112.3)	(147.6)	(95.3)
Additions to equipment held for rental	(17.9)	(26.6)	(4.8)
Proceeds from sale of property, plant and equipment	2.4	3.1	5.7
Proceeds from sale of equipment held for rental	38.8	12.0	5.8
Other investing activities	11.4	6.1	(1.8)
Net cash used by investing activities	(77.6)	(153.0)	(90.4)
Financing activities:
Proceeds from issuance of debt (original maturities greater than three months)	303.9		639.4
Repayments of debt (original maturities greater than three months)	(300.0)		(653.8)
Debt issuance costs	(9.6)		(12.9)
Repurchases of Common Stock	(51.5)	(357.4)	(257.0)
Dividends paid	(81.8)	(75.5)	(71.2)
Proceeds from exercise of stock options	26.1	11.3	16.6
Other financing activities	(2.6)
Net cash used by financing activities	(115.5)	(421.6)	(338.9)
Effect of exchange rate changes on cash	0.3	0.1	0.6
Increase (decrease) in cash and cash equivalents	134.5	(6.2)	7.6
Cash and cash equivalents at beginning of year	448.4	454.6	447.0
Cash and cash equivalents at end of year	582.9	448.4	454.6
Supplemental disclosures:
Cash paid for interest	55.9	53.6	55.7
Cash paid for income taxes	157.2	$ 117.6	$ 100.3
Cash paid for operating lease liabilities	55.8
Operating right-of-use assets obtained	$ 23.3