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Earnings (Loss) Per Common Share Level 4 (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2015 | Jun. 30, 2014 | Jun. 30, 2015 | Jun. 30, 2014
Net Income (Loss) Attributable to Parent [Abstract] |  |  |  |
Income (Loss) from Continuing Operations Attributable to Parent | $ 413 | $ 150 | $ 880 | $ 616
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest | 0 | (617) | 0 | (588)
Net Income (Loss) Attributable to Parent | $ 413 | $ (467) | $ 880 | $ 28
Weighted Average Number of Shares Outstanding Reconciliation [Abstract] |  |  |  |
Weighted Average Number of Shares Outstanding, Basic | 418.7 | 450.6 | 420.6 | 450.2
Incremental Common Shares Attributable to Dilutive Effect of Call Options and Warrants | 5.0 | 11.0 | 5.3 | 16.9
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements | 4.4 | 6.3 | 5.0 | 6.2
Weighted Average Number of Shares Outstanding, Diluted | 428.1 | 467.9 | 430.9 | 473.3
Earnings Per Share, Basic and Diluted [Abstract] |  |  |  |
Income (Loss) from Continuing Operations, Per Basic Share | $ 0.99 | $ 0.33 | $ 2.09 | $ 1.37
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share | 0.00 | (1.37) | 0.00 | (1.31)
Earnings Per Share, Basic | 0.99 | (1.04) | 2.09 | 0.06
Income (Loss) from Continuing Operations, Per Diluted Share | 0.96 | 0.32 | 2.04 | 1.30
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share | 0.00 | (1.32) | 0.00 | (1.24)
Earnings Per Share, Diluted | $ 0.96 | $ (1.00) | $ 2.04 | $ 0.06

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