Description of Business and Significant Accounting Policies - Out of Period Adjustments (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended
Dec. 31, 2011
Inter-company Transactions Included in Cumulative Translation Adjustment [Member]
Foreign currency adjustments charged to other income and expense	$ 2
Brazil Tax Accounts Determined to be Unrecoverable [Member]
Increase in selling, general and administrative expenses to correct tax accounts in Brazil determined to be unrecoverable	$ 4

The aggregate foreign currency transaction gain (loss) (both realized and unrealized) included in determining net income for the reporting period. Excludes foreign currency transactions designated as hedges of net investment in a foreign entity and intercompany foreign currency transactions that are of a long-term nature, when the entities to the transaction are consolidated, combined, or accounted for by the equity method in the reporting enterprise's financial statements. For certain enterprises, primarily banks, that are dealers in foreign exchange, foreign currency transaction gains (losses) may be disclosed as dealer gains (losses).

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Reflects the effects of adjustments of previously recorded tax expense, significant settlements of income tax disputes, and unusual tax positions or infrequent actions taken by the entity, including tax assessment reversal, IRS tax settlement and unusual repatriation of foreign earnings.

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