Reportable Segment Information - Sales and Operating Income by Reportable Segment (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Segment Reporting Information [Line Items]
Sales	$ 792	$ 516	$ 2,146	$ 1,701
Adjusted Earnings Before Interest Taxes Depreciation and Amortization	173	99	479	348
Net interest and other financing expenses	(17)	(19)	(92)	(73)
Net pension and other postretirement plan income	(14)	(9)	(41)	(27)
Net legacy and separation-related expenses	1	1	2	0
Income before income taxes	128	78	335	263
Operating Segments
Segment Reporting Information [Line Items]
Sales	792	516	2,146	1,701
Adjusted Earnings Before Interest Taxes Depreciation and Amortization	193	123	532	388
Net interest and other financing expenses	(17)	(19)	(92)	(73)
Depreciation and amortization	(24)	(17)	(68)	(48)
Net pension and other postretirement plan income	14	9	41	27
Net legacy and separation-related expenses	(1)	(1)	(2)	0
LIFO (charge) credit	(17)	7	(26)	12
Business interruption recovery	0	0	3	0
Acquisition and divestiture-related costs	0	0	0	(2)
Restructuring and related expenses	0	0	0	(1)
Income before income taxes	128	78	335	263
Corporate, Non-Segment
Segment Reporting Information [Line Items]
Adjusted Earnings Before Interest Taxes Depreciation and Amortization	(20)	(24)	(53)	(40)
Retail Services \| EMEA
Segment Reporting Information [Line Items]
Sales	0	0	0	0
Retail Services \| Asia Pacific
Segment Reporting Information [Line Items]
Sales	0	0	0	0
Retail Services \| Latin America
Segment Reporting Information [Line Items]
Sales	0	0	0	0
Retail Services \| Operating Segments
Segment Reporting Information [Line Items]
Sales	330	199	869	629
Adjusted Earnings Before Interest Taxes Depreciation and Amortization	112	54	277	170
Global Products
Segment Reporting Information [Line Items]
Sales	462	317	1,277	1,072
Global Products \| EMEA
Segment Reporting Information [Line Items]
Sales	56	34	161	125
Global Products \| Asia Pacific
Segment Reporting Information [Line Items]
Sales	96	65	267	193
Global Products \| Latin America
Segment Reporting Information [Line Items]
Sales	32	11	94	61
Global Products \| Operating Segments
Segment Reporting Information [Line Items]
Sales	462	317	1,277	1,072
Adjusted Earnings Before Interest Taxes Depreciation and Amortization	$ 81	$ 69	$ 255	$ 218

The capitalized costs incurred during the period (excluded from amortization) to purchase, lease or otherwise acquire an unproved property, including costs of lease bonuses and options to purchase or lease properties, the portion of costs applicable to minerals when land including mineral rights is purchased in fee, brokers' fees, recording fees, legal costs, and other costs incurred in acquiring properties.

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