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SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES (Earnings Per Share) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions | 3 Months Ended | 12 Months Ended
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Dec. 31, 2016 | Sep. 30, 2016 | Jun. 30, 2016 | Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Accounting Policies [Abstract] |  |  |  |  |  |  |  |  |  |  |
Net loss from continuing operations | $ 202 | $ 292 | $ (229) | $ (4,097) | $ (4,090) | $ (3,815) | $ (1,828) | $ (2,447) | $ (3,832) | $ (12,180) | $ (1,022)
Net income from continuing operations attributable to noncontrolling interests |  |  |  |  |  |  |  |  | (227) | (27) | (358)
Gain on redemption and preferred dividends attributable to noncontrolling interests |  |  |  |  |  |  |  |  | 161 | (41) | (40)
Accumulated dividends on participating securities |  |  |  |  |  |  |  |  | (3) | (3) | (3)
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent |  |  |  |  |  |  |  |  | (3,901) | (12,251) | (1,423)
Net (loss) income from discontinued operations | (2) | (6) | (181) | (4) | (4) | 25 | 29 | 41 | (193) | 91 | 277
Net income from discontinued operations attributable to noncontrolling interests | $ (19) | $ (22) | $ (12) | $ (10) | $ (11) | $ (16) | $ (26) | $ (26) | (63) | (79) | (165)
Net (loss) income from discontinued operations attributable to common stockholders |  |  |  |  |  |  |  |  | (256) | 12 | 112
Net Income (Loss) Available to Common Stockholders, Diluted |  |  |  |  |  |  |  |  | $ (4,157) | $ (12,239) | $ (1,311)
Basic and diluted weighted-average shares of common stock outstanding (in shares) |  |  |  |  |  |  |  |  | 1,318 | 1,082 | 1,039
Basic and diluted net (loss) income per share attributable to common stockholders: |  |  |  |  |  |  |  |  |  |  |
Continuing operations (in dollars per share) | $ 0.22 | $ 0.18 | $ (0.23) | $ (3.34) | $ (3.46) | $ (3.59) | $ (1.78) | $ (2.40) | $ (2.96) | $ (11.32) | $ (1.37)
Discontinued operations (in dollars per share) | (0.01) | (0.02) | (0.15) | (0.01) | (0.01) | 0.01 | 0.00 | 0.02 | (0.20) | 0.01 | 0.11
Earnings per share, basic and diluted (in dollars per share) | $ 0.21 | $ 0.16 | $ (0.38) | $ (3.35) | $ (3.47) | $ (3.58) | $ (1.78) | $ (2.38) | $ (3.16) | $ (11.31) | $ (1.26)
Potential anti-dilutive securities |  |  |  |  |  |  |  |  | 12 | 9 | 10
Outstanding options with exercise prices greater than market price of common stock |  |  |  |  |  |  |  |  | 46 | 45 | 31

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