Condensed Consolidated Statements of Cash Flows - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2021	Jun. 30, 2020
Cash flows from operating activities:
Net earnings	$ 158,744	$ 183,156
Adjustments to reconcile net earnings to net cash provided by operating activities:
Depreciation and amortization	97,799	97,582
Impairment of assets sold		37,902
Net gain on sales of assets and businesses	(4,073)	(11,012)
Gain on cross-currency interest rate swaps, net		(30,481)
Stock-based compensation	19,053	20,088
Deferred income taxes	137	(1,756)
Changes in operating assets and liabilities:
Trade accounts receivable	4,107	63,253
Unbilled receivables (contract assets)	(25,159)	(53,851)
Costs to fulfill a contract	(14,750)	(18,044)
Inventories	13,562	(6,402)
Accounts payable and accrued liabilities	51,308	(124,231)
Contract liabilities	20,113	21,491
Income taxes	3,492	(33,085)
Retirement benefit obligations	(5,221)	(3,249)
Other	(1,197)	71,055
Net cash provided by operating activities	317,915	212,416
Cash flows from investing activities:
Payments for purchase of property, plant, and equipment	(21,347)	(39,072)
Proceeds from sale of assets	141	18,844
Proceeds from business divestiture		10,443
Proceeds from sales of short-term investments	16,566	12,700
Payments for purchases of short-term investments	(14,326)	(13,109)
Net cash (used in) investing activities	(18,966)	(10,194)
Cash flows from financing activities:
Cash dividends paid	(25,734)	(32,587)
Proceeds from sales of treasury stock	32,219	14,790
Payments for repurchases of common stock		(13,346)
Borrowings on revolving lines of credit and short-term borrowings	74,400	1,027,342
Payments on revolving lines of credit and short-term borrowings	(74,400)	(1,191,319)
Payments of long-term debt and finance lease obligations	(101,214)	(1,187)
Net cash (used in) financing activities	(94,729)	(196,307)
Effect of exchange rate changes on cash and cash equivalents	4,517	(3,625)
Net change in cash and cash equivalents	208,737	2,290
Cash and cash equivalents, including restricted cash, at beginning of year	153,270	99,073
Cash and cash equivalents, including restricted cash, at end of period	$ 362,007	$ 101,363