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v3.21.2

Restaurant Information by Ownership Type (Details) - Restaurant | Sep. 30, 2021 | Sep. 30, 2020
--- | --- | ---
Segment Reporting Information [Line Items] |  |
Number of Restaurants | 39,676 | 39,096
Franchised |  |
Segment Reporting Information [Line Items] |  |
Number of Restaurants | 36,986 | 36,438
Franchised | Conventional franchised |  |
Segment Reporting Information [Line Items] |  |
Number of Restaurants | 21,552 | 21,781
Franchised | Developmental licensed |  |
Segment Reporting Information [Line Items] |  |
Number of Restaurants | 7,795 | 7,660
Franchised | Affiliated |  |
Segment Reporting Information [Line Items] |  |
Number of Restaurants | 7,639 | 6,997
Company-operated |  |
Segment Reporting Information [Line Items] |  |
Number of Restaurants | 2,690 | 2,658

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- Definition Represents the number of restaurants. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | instant

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- Definition 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. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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- Details
Name: | mcd_RestaurantOwnershipTypeAxis=us-gaap_FranchisedUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | mcd_SegmentReportingInformationBySecondarySegmentAxis=mcd_ConventionalFranchisesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | mcd_SegmentReportingInformationBySecondarySegmentAxis=mcd_DevelopmentalLicenseesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | mcd_SegmentReportingInformationBySecondarySegmentAxis=srt_AffiliatedEntityMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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- Details
Name: | mcd_RestaurantOwnershipTypeAxis=us-gaap_EntityOperatedUnitsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |