Condensed Consolidated Statement of Net Income (USD $) In Millions, except Per Share data, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Revenues
Sales by Company-operated restaurants	$ 3,914.1us-gaap_SalesRevenueGoodsNet	$ 4,490.5us-gaap_SalesRevenueGoodsNet
Revenues from franchised restaurants	2,044.8us-gaap_FranchiseRevenue	2,209.8us-gaap_FranchiseRevenue
Total revenues	5,958.9us-gaap_Revenues	6,700.3us-gaap_Revenues
Operating costs and expenses
Company-operated restaurant expenses	3,354.3mcd_CompanyOperatedRestaurantExpenses	3,767.1mcd_CompanyOperatedRestaurantExpenses
Franchised restaurants-occupancy expenses	403.6us-gaap_FranchiseCosts	417.1us-gaap_FranchiseCosts
Selling, general & administrative expenses	582.8	620.4
Other operating (income) expense, net	232.7us-gaap_OtherOperatingIncomeExpenseNet	(40.3)us-gaap_OtherOperatingIncomeExpenseNet
Total operating costs and expenses	4,573.4us-gaap_CostsAndExpenses	4,764.3us-gaap_CostsAndExpenses
Operating income	1,385.5us-gaap_OperatingIncomeLoss	1,936.0us-gaap_OperatingIncomeLoss
Interest expense	147.3us-gaap_InterestExpense	135.5us-gaap_InterestExpense
Nonoperating (income) expense, net	(15.9)us-gaap_NonoperatingIncomeExpense	17.2us-gaap_NonoperatingIncomeExpense
Income before provision for income taxes	1,254.1	1,783.3
Provision for income taxes	442.6us-gaap_IncomeTaxExpenseBenefit	578.5us-gaap_IncomeTaxExpenseBenefit
Net income	$ 811.5us-gaap_NetIncomeLoss	$ 1,204.8us-gaap_NetIncomeLoss
Earnings per common share-basic	$ 0.84us-gaap_EarningsPerShareBasic	$ 1.22us-gaap_EarningsPerShareBasic
Earnings per common share-diluted	$ 0.84us-gaap_EarningsPerShareDiluted	$ 1.21us-gaap_EarningsPerShareDiluted
Dividends declared per common share	$ 0.85	$ 0.81
Weighted average shares outstanding-basic	960.6	989.6
Weighted average shares outstanding-diluted	965.5	995.9

Cost of sales and controllable expenses associated with company-operated restaurants.

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