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Equity Stock Repurchase Program (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions |  | 3 Months Ended | 9 Months Ended | 63 Months Ended
--- | --- | --- | --- | ---
May. 18, 2015 | Sep. 30, 2015 | Sep. 30, 2015 | Sep. 30, 2014 | Sep. 30, 2015
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Stock Repurchased During Period, Shares |  | 8.4 |  |  | 137.9
Stock Repurchased During Period, Value |  | $ 101 | $ 408 | $ 140 | $ 1,700
Stock Repurchase Program, Remaining Authorized Repurchase Amount |  | $ 16 | $ 16 |  | $ 16
Treasury Stock Acquired, Average Cost Per Share |  |  |  |  | $ 12.44
share repurchase program CIC buyback [Domain] |  |  |  |  |
Equity, Class of Treasury Stock [Line Items] |  |  |  |  |
Stock Repurchased During Period, Shares | 20.0 |  |  |  |
Stock Repurchased During Period, Value | $ 261 |  |  |  |
Treasury Stock Acquired, Average Cost Per Share | $ 13.07 |  |  |  |

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- Definition Total cost of shares repurchased divided by the total number of shares repurchased. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 505 -SubTopic 30 -Section 45 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655 + Details
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