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Income Taxes Deferred Tax Assets (Liabilities), Net (Details) (USD $)
In Millions, unless otherwise specified |
12 Months Ended |
|---|---|
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Sep. 30, 2012
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| Tax Credit Carryforwards [Abstract] | |
| Unused foreign tax credits | $ 25 |
| Year in which foreign tax credits begin to expire | 2013 |
| Valuation Allowance [Abstract] | |
| Valuation allowance on foreign deferred tax assets | 114 |
| Valuation allowance on state net operating losses | 16 |
| Valuation allowance on net capital losses | 12 |
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Federal [Member]
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| Operating Loss Carryforwards [Line Items] | |
| Unused net operating loss carryforwards | 154 |
| Expiration of unused net operating loss carryforwards | 2021 through 2030 |
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Foreign [Member]
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| Operating Loss Carryforwards [Line Items] | |
| Unused net operating loss carryforwards | 41 |
| Expiration of unused net operating loss carryforwards | 2014 through 2021 |
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State [Member]
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| Operating Loss Carryforwards [Line Items] | |
| Unused net operating loss carryforwards | $ 591 |
| Expiration of unused net operating loss carryforwards | 2013 through 2032 |
| X | ||||||||||
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- Definition
The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net capital loss carryforwards for which it is more likely than not that a tax benefit will not be realized. No definition available.
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| X | ||||||||||
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- Definition
Earliest expiration year of the tax credit carryforward. No definition available.
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| X | ||||||||||
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- Definition
The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws. No definition available.
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| X | ||||||||||
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- Definition
The sum of the portions of deferred tax assets as of the balance sheet date for which, based on the weight of available evidence, it is more likely than not will not be realized through future reductions of tax-based income. No definition available.
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The sum of domestic, foreign and state and local operating loss carryforwards, before tax effects, available to reduce future taxable income under enacted tax laws. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Definition
The expiration date of each operating loss carryforward included in total operating loss carryforwards, or the applicable range of such expiration dates. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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| X | ||||||||||
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- Definition
The portion of the valuation allowance pertaining to the deferred tax asset representing potential future taxable deductions from net operating loss carryforwards for which it is more likely than not that a tax benefit will not be realized. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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