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Summary of Significant Accounting Policies Advertising Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Accounting Policies [Abstract]
Company Operated Restaurant Advertising Expense	$ 377.6	$ 325.5	$ 365.8
Other Marketing Related Expenses	$ 82.9	$ 329.2	$ 81.5

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- Definition

Advertising costs of Company-operated restaurants included in operating expenses

+ References

No definition available.

+ Details

Name:	mcd_CompanyOperatedRestaurantAdvertisingExpense
Namespace Prefix:	mcd_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- Definition

Production costs for radio and television advertising as well as other marketing-related expenses included in selling, general and administrative expenses.

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No definition available.

+ Details

Name:	mcd_OtherMarketingRelatedExpenses
Namespace Prefix:	mcd_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

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- References

No definition available.

+ Details

Name:	us-gaap_AccountingPoliciesAbstract
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration