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Note 1. Significant Accounting Policies VIE (Details) $ in Millions	Sep. 30, 2017 USD ($) Entity	Sep. 30, 2016 USD ($) Entity
Variable Interest Entity, Number of Entities | Entity	2	2
Variable Interest Entity, Consolidated, Carrying Amount, Assets	$ 288	$ 326
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	169	219
Other Current Liabilities [Member]
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	169	219
Other Noncurrent Assets [Member]
Variable Interest Entity, Consolidated, Carrying Amount, Assets	56	45
Other Current Assets [Member]
Variable Interest Entity, Consolidated, Carrying Amount, Assets	$ 232	$ 281

X

- Definition

Variable Interest Entity, Number of Entities

+ References

No definition available.

+ Details

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X

- Definition

The carrying amount of the consolidated Variable Interest Entity's assets included in the reporting entity's statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (bb)
-URI http://asc.fasb.org/extlink&oid=64801991&loc=d3e5710-111685

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X

- Definition

The carrying amount of the consolidated Variable Interest Entity's liabilities included in the reporting entity's statement of financial position.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (bb)
-URI http://asc.fasb.org/extlink&oid=64801991&loc=d3e5710-111685

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