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Note 18. NonConsolidated Partially-Owned Affiliates (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2015
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Summarized Financial Information, Revenue	$ 17,262	$ 16,126	$ 9,449
Equity Method Investment, Summarized Financial Information, Current Assets	7,720	6,135
Equity Method Investment, Summarized Financial Information, Noncurrent Assets	3,157	2,659
Equity Method Investment, Summarized Financial Information, Assets	10,877	8,794
Equity Method Investment, Summarized Financial Information, Current Liabilities	7,362	5,855
Equity Method Investment, Summarized Financial Information, Noncurrent Liabilities	380	195
Equity Method Investment, Summarized Financial Information, Noncontrolling Interest	139	140
Equity Method Investment Summarized Financial Information, Equity	2,996	2,604
Equity Method Investment, Summarized Financial Information, Liabilities and Equity	10,877	8,794
Equity Method Investment, Summarized Financial Information, Gross Profit (Loss)	1,994	1,796	1,200
Equity Method Investments Summarized Financial Information Operating Income (Loss)	1,160	1,089	802
Equity Method Investments Summarized Financial Information Net Income (Loss) Including Noncontrolling Interests	1,039	973	708
Equity Method Investments Summarized Financial Information Net Income (Loss) Attributable to Noncontrolling Interests	65	55	52
Equity Method Investment, Summarized Financial Information, Net Income (Loss)	974	918	656
Income (Loss) from Equity Method Investments before Basis Adjustments	547	368	291
Equity Method Investments Basis Adjustments	(25)	(24)	(11)
Income (Loss) from Equity Method Investments	522	344	280
Investments in and Advance to Affiliates, Subsidiaries, Associates, and Joint Ventures	1,793	1,714
YFJC [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Summarized Financial Information, Revenue	4,617	4,198	3,855
Equity Method Investment, Summarized Financial Information, Current Assets	3,059	2,306
Equity Method Investment, Summarized Financial Information, Noncurrent Assets	678	539
Equity Method Investment, Summarized Financial Information, Assets	3,737	2,845
Equity Method Investment, Summarized Financial Information, Current Liabilities	2,793	2,004
Equity Method Investment, Summarized Financial Information, Noncurrent Liabilities	49	44
Equity Method Investment, Summarized Financial Information, Noncontrolling Interest	108	113
Equity Method Investment Summarized Financial Information, Equity	787	684
Equity Method Investment, Summarized Financial Information, Liabilities and Equity	3,737	2,845
Equity Method Investment, Summarized Financial Information, Gross Profit (Loss)	603	583	538
Equity Method Investments Summarized Financial Information Operating Income (Loss)	432	426	405
Equity Method Investments Summarized Financial Information Net Income (Loss) Including Noncontrolling Interests	351	348	332
Equity Method Investments Summarized Financial Information Net Income (Loss) Attributable to Noncontrolling Interests	47	48	46
Equity Method Investment, Summarized Financial Information, Net Income (Loss)	304	300	286
Income (Loss) from Equity Method Investments before Basis Adjustments	152	150	142
Equity Method Investments Basis Adjustments	(2)	(3)	(3)
Income (Loss) from Equity Method Investments	150	147	139
All Other [Member]
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Summarized Financial Information, Revenue	12,645	11,928	5,594
Equity Method Investment, Summarized Financial Information, Current Assets	4,661	3,829
Equity Method Investment, Summarized Financial Information, Noncurrent Assets	2,479	2,120
Equity Method Investment, Summarized Financial Information, Assets	7,140	5,949
Equity Method Investment, Summarized Financial Information, Current Liabilities	4,569	3,851
Equity Method Investment, Summarized Financial Information, Noncurrent Liabilities	331	151
Equity Method Investment, Summarized Financial Information, Noncontrolling Interest	31	27
Equity Method Investment Summarized Financial Information, Equity	2,209	1,920
Equity Method Investment, Summarized Financial Information, Liabilities and Equity	7,140	5,949
Equity Method Investment, Summarized Financial Information, Gross Profit (Loss)	1,391	1,213	662
Equity Method Investments Summarized Financial Information Operating Income (Loss)	728	663	397
Equity Method Investments Summarized Financial Information Net Income (Loss) Including Noncontrolling Interests	688	625	376
Equity Method Investments Summarized Financial Information Net Income (Loss) Attributable to Noncontrolling Interests	18	7	6
Equity Method Investment, Summarized Financial Information, Net Income (Loss)	670	618	370
Income (Loss) from Equity Method Investments before Basis Adjustments	395	218	149
Equity Method Investments Basis Adjustments	(23)	(21)	(8)
Income (Loss) from Equity Method Investments	$ 372	$ 197	$ 141

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This item represents the entity's proportionate share for the period of the net income (loss) of its investee (such as unconsolidated subsidiaries and joint ventures) to which the equity method of accounting is applied. This item includes income or expense related to stock-based compensation based on the investor's grant of stock to employees of an equity method investee.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03(12))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-04(10))
-URI http://asc.fasb.org/extlink&oid=6879464&loc=d3e573970-122913

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66902209&loc=d3e3602-108585

Reference 4: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 323
-SubTopic 10
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=66022249&loc=d3e33749-111570

Reference 5: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 225
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-04(13)(f))
-URI http://asc.fasb.org/extlink&oid=6879574&loc=d3e536633-122882

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X

- Definition

Total investments in (A) an entity in which the entity has significant influence, but does not have control, (B) subsidiaries that are not required to be consolidated and are accounted for using the equity and or cost method, and (C) an entity in which the reporting entity shares control of the entity with another party or group. Includes long-term advances receivable from a party that is affiliated with the reporting entity by means of direct or indirect ownership.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.12)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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