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Note 1. Significant Accounting Policies VIE (Details) $ in Millions	Dec. 31, 2017 USD ($) Entity	Sep. 30, 2017 USD ($)
Variable Interest Entity, Number of Entities | Entity	2
Variable Interest Entity, Consolidated, Carrying Amount, Assets	$ 273	$ 288
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	159	169
Other Current Liabilities [Member]
Variable Interest Entity, Consolidated, Carrying Amount, Liabilities	159	169
Other Noncurrent Assets [Member]
Variable Interest Entity, Consolidated, Carrying Amount, Assets	63	56
Other Current Assets [Member]
Variable Interest Entity, Consolidated, Carrying Amount, Assets	$ 210	$ 232

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- Definition

Variable Interest Entity, Number of Entities

+ References

No definition available.

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- 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=77990344&loc=d3e5710-111685

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- Definition

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+ References

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-Name Accounting Standards Codification
-Topic 810
-SubTopic 10
-Section 50
-Paragraph 3
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