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Leasing Arrangements - Schedule of Rent Expense (Details) - USD ($) $ in Millions | 3 Months Ended
--- | ---
Mar. 31, 2019 | Mar. 31, 2018
Leases [Abstract] |  |
Rent Expense - Restaurants | $ 378.2 | $ 359.8
Rent Expense - Other | 19.7 | 18.8
Total Rent Expense | $ 397.9 | $ 378.6

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- Definition Rent Expense - Other + References No definition available. + Details
Name: | mcd_RentExpenseOther
Namespace Prefix: | mcd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition Rent Expense - Restaurants + References No definition available. + Details
Name: | mcd_RentExpenseRestaurants
Namespace Prefix: | mcd_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
Name: | us-gaap_LeaseAndRentalExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_LeasesAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration