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Recent Accounting Pronouncements Recent Accounting Pronouncements (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
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Sep. 30, 2020 | Sep. 30, 2020
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |
Allowance For Doubtful Accounts, Accounts Receivable |  | $ 85.3
Increase (Decrease) in Accounts and Notes Receivable | $ (27.0) | $ 66.0

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- Definition Allowance For Doubtful Accounts, Accounts Receivable + References No definition available. + Details
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Namespace Prefix: | mcd_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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- Definition The increase (decrease) during the reporting period of the sum of amounts due within one year (or one business cycle) from customers for the credit sale of goods and services; and from note holders for outstanding loans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3602-108585 + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | duration

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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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