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v3.19.3.a.u2

Subsequent Events (Details) | 12 Months Ended
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Dec. 31, 2019
Subsequent Event [Line Items] |
China Percent of Systemwide Sales | 5.00%
China Percent of Consolidated Revenues | 1.00%
China Percent of Consolidated Operating Income | 3.00%

X
- Definition China Percent of Consolidated Operating Income + References No definition available. + Details
Name: | mcd_ChinaPercentofConsolidatedOperatingIncome
Namespace Prefix: | mcd_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition China Percent of Consolidated Revenues + References No definition available. + Details
Name: | mcd_ChinaPercentofConsolidatedRevenues
Namespace Prefix: | mcd_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition China Percent of Systemwide Sales + References No definition available. + Details
Name: | mcd_ChinaPercentofSystemwideSales
Namespace Prefix: | mcd_
Data Type: | num:percentItemType
Balance Type: | na
Period Type: | duration

X
- Definition Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event. + References No definition available. + Details
Name: | us-gaap_SubsequentEventLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration