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v3.3.1.900

Risks And Uncertainties (Details) $ in Millions | 12 Months Ended |  |  |
--- | --- | --- | --- | ---
Dec. 31, 2015 USD ($) business segment customer | Dec. 31, 2014 USD ($) customer | Dec. 31, 2013 USD ($) customer | Dec. 31, 2012 USD ($)
Unusual Risk or Uncertainty [Line Items] |  |  |  |
Number of strategic business units | segment | 6 |  |  |
Segment Reporting, Additional Information about Entity's Reportable Segments | business | 2 |  |  |
Cash and cash equivalents | $ 1,262 | $ 1,539 | $ 1,642 | $ 1,900
Percent of revenue generated outside US | 76.00% |  |  |
Number of customers that accounted for 10% of more of total revenue | customer | 0 | 0 | 0 |
Maritza [Member] |  |  |  |
Unusual Risk or Uncertainty [Line Items] |  |  |  |
Allowance for Doubtful Accounts Receivable | $ 0 |  |  |
Total Maritza Receivables | 351 |  |  |
Past due receivables [Member] | Maritza [Member] |  |  |  |
Unusual Risk or Uncertainty [Line Items] |  |  |  |
Total Maritza Receivables | $ 307 |  |  |

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