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Subsequent Events Subsequent Event (Details)
 12 Months Ended
Dec. 31, 2014
U.S.  
Subsequent Event [Line Items]  
Segment Operating Income as a Percentage of Consolidated Total 40.00%mcd_SegmentOperatingIncomeasaPercentageofConsolidatedTotal
/ us-gaap_StatementBusinessSegmentsAxis
= country_US
International Lead Markets  
Subsequent Event [Line Items]  
Segment Operating Income as a Percentage of Consolidated Total 40.00%mcd_SegmentOperatingIncomeasaPercentageofConsolidatedTotal
/ us-gaap_StatementBusinessSegmentsAxis
= mcd_InternationalLeadMarketsMember
High-Growth Markets  
Subsequent Event [Line Items]  
Segment Operating Income as a Percentage of Consolidated Total 10.00%mcd_SegmentOperatingIncomeasaPercentageofConsolidatedTotal
/ us-gaap_StatementBusinessSegmentsAxis
= mcd_HighGrowthMarketsMember