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Note 2. Summary of Significant Accounting Policies Supplemental Cash Flow Information (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2015 | Dec. 31, 2014 | Dec. 31, 2013
Capital Lease Obligations Incurred | $ 17 | $ 8 | $ 14
Noncash tenant improvements |  |  | 6
2012 Bonus Plan [Member] |  |  |
Stock Issued |  |  | $ 22

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