Revenues (Disaggregation of Revenues) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2018	Mar. 31, 2017
Disaggregation of Revenue [Line Items]
Sales by Company-operated restaurants	$ 2,535.6	$ 3,411.9
Revenues from franchised restaurants	2,603.3	2,264.0
Total revenues	5,138.9	5,675.9
United States
Disaggregation of Revenue [Line Items]
Sales by Company-operated restaurants	708.7	835.6
Revenues from franchised restaurants	1,158.5	1,093.4
Total revenues	1,867.2	1,929.0
International Lead Markets
Disaggregation of Revenue [Line Items]
Sales by Company-operated restaurants	1,007.1	941.2
Revenues from franchised restaurants	870.4	702.3
Total revenues	1,877.5	1,643.5
High Growth Markets
Disaggregation of Revenue [Line Items]
Sales by Company-operated restaurants	700.3	1,345.3
Revenues from franchised restaurants	271.9	191.9
Total revenues	972.2	1,537.2
Foundational Markets and Corporate
Disaggregation of Revenue [Line Items]
Sales by Company-operated restaurants	119.5	289.8
Revenues from franchised restaurants	302.5	276.4
Total revenues	$ 422.0	$ 566.2

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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Revenue earned during the period from consideration (often a percentage of the franchisee's sales) received for the right to operate a business using the entity's name, merchandise, services, methodologies, promotional support, marketing, and supplies.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(e))
-URI http://asc.fasb.org/extlink&oid=63488584&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 952
-SubTopic 605
-Section 45
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=68058139&loc=d3e68564-108043

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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