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New Accounting Standards Recently Adopted Accounting Pronouncements (Details) $ in Millions | 3 Months Ended
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Dec. 31, 2017 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |
Deferred tax asset from stock options exercised and restricted stock vestings | $ 179

X
- Definition Deferred tax asset from stock options exercised and restricted stock vestings on a modified retrospective basis through a cumulative-effect adjustment to retained earnings. + References No definition available. + Details
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Balance Type: | debit
Period Type: | duration

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
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Namespace Prefix: | us-gaap_
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Balance Type: | na
Period Type: | duration