Dispositions and Other Income - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	6 Months Ended	1 Months Ended
Mar. 31, 2012	Dec. 03, 2010 Miramax
Significant Acquisitions and Disposals [Line Items]
Proceeds from dispositions		$ 663
Net proceeds from dispositions after adjustments		532
Pre-tax gain from dispositions		64
Goodwill associated with dispositions	4	217
After-tax (loss) from dispositions		(39)
Tax expense in connection with dispositions		$ 103

Write-off of the carrying amount of goodwill associated with all or a portion of a reporting unit that is sold in the period.

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The portion of the difference between total income tax expense or benefit as reported in the Income Statement and the expected income tax expense or benefit computed by applying the domestic federal statutory income tax rates to pretax income from continuing operations attributable to the disposition of a business (not qualifying for treatment as a discontinued operation) in the period.

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The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period.

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