Other Current Assets (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
Other receivables and assets
Receivables from government agencies	$ 152	$ 171
Taxes and other government receivables	77	117
Advances	118	68
Prepayments	46	51
Loans and deposits	14	15
Interest receivable	4	6
Derivative instruments	2	85
Receivables from equity-method investments	20	33
Other current assets	73	63
Total	$ 506	$ 609

Advances receivable.

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- Definition

Loans and deposits.

+ References

No definition available.

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- Definition

Other receivables and assets.

+ References

No definition available.

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- Definition

Taxes and other government receivables.

+ References

No definition available.

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- Definition

Carrying amount as of the balance sheet date of the asset arising from derivative instruments and hedging activities, which are expected to be converted into cash or otherwise disposed of within a year or the normal operating cycle, if longer.

+ References

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- Definition

Amount of receivables due from an entity that is affiliated with the reporting entity by means of direct or indirect ownership, due within 1 year (or 1 business cycle).

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-Topic 210

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-Subparagraph (SX 210.5-02.3(a)(2))

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-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

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-Paragraph 2

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-Publisher SEC

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- Definition

Carrying amount as of the balance sheet date of amounts due under the terms of governmental, corporate, or foundation grants. For classified balance sheets, represents the current amount receivable, that is amounts expected to be collected within one year or the normal operating cycle, if longer.

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- Definition

Carrying amount as of the balance sheet date of current interest earned but not received. Also called accrued interest or accrued interest receivable. For classified balance sheets, represents the current amount receivable, that is amounts expected to be collected within one year or the normal operating cycle, if longer.

+ References

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- Definition

Aggregate carrying amount, as of the balance sheet date, of current assets not separately disclosed in the balance sheet. Current assets are expected to be realized or consumed within one year (or the normal operating cycle, if longer).

+ References

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- Definition

Sum of the amounts paid in advance for capitalized costs that will be expensed with the passage of time or the occurrence of a triggering event, and will be charged against earnings within one year or the normal operating cycle, if longer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

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