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Other Financial Data Schedule of Other Current Assets (Details) | Jun. 30, 2014 USD ($) | Dec. 31, 2013 USD ($) | Jun. 30, 2014 Notes Payable, Other Payables [Member] Debt Securities 6.25 Percent, Due 2014 [Member] USD ($) | Jun. 30, 2014 Notes Payable, Other Payables [Member] Debt Securities 6.25 Percent, Due 2014 [Member] EUR (€)
--- | --- | --- | --- | ---
Debt Instrument [Line Items] |  |  |  |  |  |
Debt Instrument, Interest Rate, Stated Percentage |  |  |  |  | 6.25% | 6.25%
Debt Instrument, Face Amount |  |  |  |  | $ 681,000,000 | € 500,000,000
Interest Payable, Current |  |  |  |  | 42,000,000 |
Assets Held in Trust, Current | 723,000,000 | [1] | 0 | [1] |  |
Prepaid expenses | 237,000,000 |  | 229,000,000 |  |  |
Taxes receivable | 213,000,000 |  | 111,000,000 |  |  |
Deferred project costs | 99,000,000 |  | 98,000,000 |  |  |
Deferred tax assets | 81,000,000 |  | 93,000,000 |  |  |
Other | 43,000,000 |  | 32,000,000 |  |  |
Other Assets, Current | $ 1,396,000,000 |  | $ 563,000,000 |  |  |
[1] | (1)Deposit with trustee relates to the 6.25% €500 million debt securities due July 2014 and the related accrued interest, which is described further in Note 9 "Debt." The principal amount included in this balance is $681 million and the accrued interest amount is $42 million.

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