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Other Financial Data Schedule of Other Current Liabilities (Details) - USD ($) $ in Millions | Jun. 30, 2015 | Dec. 31, 2014
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Other Financial Data [Abstract] |  |
Deferred revenue | $ 425 | $ 408
Taxes payable | 24 | 64
Deferred tax liabilities | 2 | 2
Other | 394 | 314
Total | $ 845 | $ 788

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