Investment in Master Trust - Schedule of Master Trust’s Assets at Fair Value (Details) - EBP 001 [Member] - USD ($)	Dec. 31, 2025	Dec. 31, 2024
Schedule of Master Trust’s Assets at Fair Value [Line Items]
Master Trust’s assets at fair value	$ 520,933,460	$ 450,960,939
Mutual funds [Member]
Schedule of Master Trust’s Assets at Fair Value [Line Items]
Master Trust’s assets at fair value	492,178,626	420,451,141
Money market funds [Member]
Schedule of Master Trust’s Assets at Fair Value [Line Items]
Master Trust’s assets at fair value	21,576,089	19,461,529
Diageo common stock fund [Member]
Schedule of Master Trust’s Assets at Fair Value [Line Items]
Master Trust’s assets at fair value	7,178,745	11,048,269
Level 1 [Member]
Schedule of Master Trust’s Assets at Fair Value [Line Items]
Master Trust’s assets at fair value	520,933,460	450,960,939
Level 1 [Member] \| Mutual funds [Member]
Schedule of Master Trust’s Assets at Fair Value [Line Items]
Master Trust’s assets at fair value	492,178,626	420,451,141
Level 1 [Member] \| Money market funds [Member]
Schedule of Master Trust’s Assets at Fair Value [Line Items]
Master Trust’s assets at fair value	21,576,089	19,461,529
Level 1 [Member] \| Diageo common stock fund [Member]
Schedule of Master Trust’s Assets at Fair Value [Line Items]
Master Trust’s assets at fair value	$ 7,178,745	$ 11,048,269

Fair value of investment held by employee stock purchase, saving, or similar plan (employee benefit plan (EBP)). Includes, but is not limited to, derivative, investment measured at net asset value per share as practical expedient, and insurance contract not meeting fully-benefit responsive investment criteria.

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+ Details

- 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.

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