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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
	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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Change in Number of Franchised and Company Owned Outlets [Roll Forward]

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The number of offices.

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+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.4)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 310
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=49124121&loc=d3e5074-111524

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Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.17)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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