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Supplemental Statement of Cash Flows Information (Schedule of Supplemental Statement of Cash Flows Information) (Details) - USD ($) $ in Thousands	9 Months Ended
	Jun. 30, 2020	Jun. 30, 2019
Supplemental Cash Flow Information [Abstract]
Interest paid, net of amounts capitalized	$ 24,323	$ 36,018
Income taxes paid	79,353	56,210
Income tax refunds received	15,123	1,453
Non-cash activities:
Purchases of property, plant and equipment on account	2,230	4,423
Impact of the adoption of ASC 606		38,700
Impact of the adoption of ASC 842 (Note 5)	255
Impact of the adoption of ASU 2016-16		1,005
Common shares issued from treasury to settle benefit obligations (Note 21)	$ 14,748	14,846
Purchases of treasury stock on account		$ 4,204

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Future cash outflow to pay for purchases of fixed assets that have occurred.

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