XML 18 R7.htm IDEA: XBRL DOCUMENT
v3.19.1

Consolidated Statements of Cash Flows (Parenthetical) - USD ($) $ in Millions | 6 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Statement of Cash Flows [Abstract] |  |
Purchase accounting amortization | $ 0 | $ 11

X
- Definition Amount of increase (decrease) to assets, excluding financial assets and goodwill, lacking physical substance with a finite life for purchase accounting adjustments. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetsPurchaseAccountingAdjustments
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_StatementOfCashFlowsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration