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Note 5. Franchising and Marketing Activities Change in the Number of Franchised and Company Owned Outlets (Details) $ in Millions | 12 Months Ended
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Dec. 31, 2015 USD ($) | Dec. 31, 2015 USD ($) Brokerage_Offices | Dec. 31, 2015 USD ($) franchisedandcompanyownedoffices | Dec. 31, 2014 USD ($) franchisedandcompanyownedoffices | Dec. 31, 2013 USD ($) franchisedandcompanyownedoffices
Franchised: |  |  |  |  |
Change in Number of Franchised and Company Owned Outlets [Roll Forward] |  |  |  |  |
Beginning balance |  |  | 12,769 | 13,032 | 12,880
Additions |  |  | 445 | 311 | 478
Terminations/Closures |  |  | (443) | (574) | (326)
Ending balance |  |  | 12,771 | 12,769 | 13,032
Company Owned: |  |  |  |  |
Change in Number of Franchised and Company Owned Outlets [Roll Forward] |  |  |  |  |
Beginning balance |  |  | 727 | 706 | 712
Additions |  |  | 74 | 38 | 15
Terminations/Closures |  |  | (14) | (17) | (21)
Ending balance |  | 790 | 787 | 727 | 706
Franchisee Conversion Notes and Development Advance Notes [Member] |  |  |  |  |
Change in Number of Franchised and Company Owned Outlets [Roll Forward] |  |  |  |  |
Franchise conversion and development advance notes | $ | $ 115 | $ 115 | $ 115 | $ 97 |
Allowance for franchise conversion and development advance notes | $ | 1 | $ 1 | $ 1 | 1 |
Forgiveness of franchise conversion and development advance notes | $ | $ 17 |  |  | $ 15 | $ 11

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