TRANSACTIONS WITH PARTIES IN INTEREST (Details) - 401(k) Plan - USD ($)	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024
TRANSACTIONS WITH PARTIES IN INTEREST
Dividends	$ 33,524,000
Unrealized gains/losses on the common stock	400,708,000
Employer \| MCDONALD'S CORPORATION COMMON STOCK
TRANSACTIONS WITH PARTIES IN INTEREST
Dividends	33,521,091
Realized gains on the common stock	67,098,630
Unrealized gains/losses on the common stock	$ 11,318,990
Number of shares held	4,424,735	4,979,636
Selling price	$ 81,348,405
Number of shares sold	266,488
Plan investment manager
TRANSACTIONS WITH PARTIES IN INTEREST
Fees paid	$ 954,153

Amount of fees paid during the period through plan participant account.

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Amount of increase (decrease) in net asset available for benefit from realized gain (loss) on investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

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Amount of increase (decrease) in net asset available for benefit from unrealized gain (loss) on investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

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Amount of increase in net asset available for benefit from dividend income on investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

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Number of shares or units of investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

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Amount of selling price for investment, excluding plan interest in master trust, sold by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

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