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Subsequent Events (Details)	12 Months Ended
	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