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CONDENSED CONSOLIDATED BALANCE SHEET (Parenthetical) - USD ($) shares in Millions, $ in Millions | Jun. 30, 2018 | Dec. 31, 2017
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Statement of Financial Position [Abstract] |  |
Total Liabilities and Shareholders’ Deficit | $ 4,326 | $ 5,311
Common Stock, No Par Value | $ 0 | $ 0
Common Stock, Shares Authorized | 750 | 750
Common Stock, Shares, Issued | 327 | 332

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