Noncontrolling interest ownership of common unit.

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- Definition

Stock Repurchased During Period, Value, Excluding Taxes

+ References

No definition available.

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Stock Repurchased, Not Yet Settled, Shares

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- Definition

Stockholders Equity [Line Items]

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No definition available.

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- Definition

Number of shares authorized to be purchased under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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-Name Accounting Standards Codification
-Section 50
-Paragraph 4
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147481520/505-30-50-4

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- Definition

Amount of realized gain (loss) from sale of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
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-Name Accounting Standards Codification
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- Definition

Percentage investment held by members or limited partners of limited liability company (LLC) or limited partnership (LP).

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
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-Subparagraph (b)
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- Definition

The number of units converted into shares of each class of partners' capital account. Units represent shares of ownership of the general, limited, and preferred partners.

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- Definition

The cash outflow to reacquire common stock during the period.

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The number of shares issued during the period upon the conversion of units. An example of a convertible unit is an umbrella partnership real estate investment trust unit (UPREIT unit).

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Amount remaining authorized for purchase of share under share repurchase plan. Includes, but is not limited to, repurchase of stock and unit of ownership.

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Number of shares that have been repurchased during the period and have not been retired and are not held in treasury. Some state laws may govern the circumstances under which an entity may acquire its own stock and prescribe the accounting treatment therefore. This element is used when state law does not recognize treasury stock.

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Shareholders' Equity - Additional Information (Details) - USD ($)	3 Months Ended				9 Months Ended
	Sep. 30, 2026	Jun. 30, 2026	Mar. 31, 2026	Mar. 31, 2025	Sep. 30, 2026	Dec. 31, 2025	Aug. 06, 2025
Stockholders Equity [Line Items]
Number of shares authorized to be repurchased (in shares)							1,000,000,000
Stock repurchased, not yet settled (in shares)					28,010
Remaining authorized repurchase amount	$ 768,000,000				$ 768,000,000
Issued Common Shares
Stockholders Equity [Line Items]
Exchange of Partnership exchangeable units for RBI common shares (in shares)	42,545	3,599,548	3,624	55,462
Repurchase of common shares (in shares)	817,041				3,101,650
Repurchase of common shares	$ 61,000,000				$ 232,000,000
Restaurant Brands International Limited Partnership
Stockholders Equity [Line Items]
Repurchase of RBI common shares and Partnership exchangeable units					214,000,000
Gain (loss) recorded on equity transactions					$ 0
Partnerships Exchangeable Units \| Restaurant Brands International Limited Partnership
Stockholders Equity [Line Items]
Number of shares authorized to be repurchased (in shares)	6,430,266				6,430,266
Repurchase of Partnership exchangeable units (in shares)					2,784,549
Exchange of Partnership exchangeable units for RBI common shares (in shares)					3,645,717
Restaurant Brands International Limited Partnership
Stockholders Equity [Line Items]
Partnership exchangeable units economic interest (as a percent)			24.00%		22.80%
Partnership exchangeable units economic interest (in shares)	102,926,279				102,926,279	109,356,545