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Other Financial Data - Schedule of Other Non-current Assets (Details) - USD ($) $ in Millions | Jun. 30, 2016 | Dec. 31, 2015
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Other Financial Data [Abstract] |  |
Deferred project costs | $ 200 | $ 210
Investments | 127 | 135
Taxes receivable | 81 | 82
Other | 168 | 165
Total | $ 576 | $ 592

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