Investments, Equity Method and Joint Ventures (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Schedule of Equity Method Investments [Line Items]
Payments to Acquire Equity Method Investments	$ 0.0	$ 1,837.0	$ 0.0
Equity Method Investment, Difference Between Carrying Amount and Underlying Equity	1,400.0
Income (Loss) from Equity Method Investments	190.0	157.0	$ 153.0
Equity Method Investee
Schedule of Equity Method Investments [Line Items]
Related Party Transaction, Revenue from Related Party	579.0	538.0
Related Party Transaction, Net Receivables Due from Related Party	89.0	157.0
Proceeds from Dividends Received	$ 15.0	$ 157.0
Grand Foods Holding
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	48.00%	48.00%
Equity Method Investments	$ 2,048.0	$ 1,973.0
McDonald's Japan Holdings Co., Ltd
Schedule of Equity Method Investments [Line Items]
Equity Method Investment, Ownership Percentage	35.00%	35.00%
Equity Method Investment, Quoted Market Value	$ 1,915.0	$ 1,849.0
Equity Method Investments	657.0	590.0
Primary Equity Method Investments
Schedule of Equity Method Investments [Line Items]
Income (Loss) from Equity Method Investments	$ 146.0	$ 113.0

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The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

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