XML 71 R55.htm IDEA: XBRL DOCUMENT
v3.8.0.1

Note 16. Income Taxes Unrecognized Tax Benefits (Tables) | 12 Months Ended
--- | ---
Sep. 30, 2017
Operating Loss Carryforwards [Line Items] |
Summary of Positions for which Significant Change in Unrecognized Tax Benefits is Reasonably Possible [Table Text Block] | A reconciliation of the beginning and ending amount of unrecognized tax benefits is as follows:
|  | Year Ended September 30,
(in millions) |  | 2017 |  | 2016 |  | 2015
Beginning balance |  | $ | 596 |  |  | $ | 390 |  |  | $ | 284 |
Additions for tax positions related to the current year |  | 76 |  |  | 288 |  |  | 138 |
Additions for tax positions of prior years |  | 5 |  |  | — |  |  | — |
Reductions for tax positions of prior years |  | (471 | ) |  | (65 | ) |  | (32 | )
Settlements with taxing authorities |  | (7 | ) |  | (15 | ) |  | — |
Statute closings |  | (6 | ) |  | (2 | ) |  | — |
Ending balance |  | $ | 193 |  |  | $ | 596 |  |  | $ | 390 |

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. + Details
Name: | us-gaap_OperatingLossCarryforwardsLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of unrecognized tax benefits for which a material change is reasonably possible in the next twelve months, typically including the nature of the uncertainty, the event(s) that could cause a material change, and an estimate of the range of the reasonably possible change or a statement that an estimate of the range cannot be made. An unrecognized tax benefit is the difference between a tax position taken in a tax return and the amounts recognized in the financial statements for which it is more likely than not, based on the technical merits of the position, that the tax position will not be sustained upon examination. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32718-109319 + Details
Name: | us-gaap_SummaryOfPositionsForWhichSignificantChangeInUnrecognizedTaxBenefitsIsReasonablyPossibleTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration