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Subsequent Events (Details) - USD ($) $ / shares in Units, $ in Millions		1 Months Ended		3 Months Ended						9 Months Ended
	Oct. 02, 2026	Oct. 29, 2026	Oct. 23, 2026	Sep. 30, 2026	Jun. 30, 2026	Mar. 31, 2026	Sep. 30, 2025	Jun. 30, 2025	Mar. 31, 2025	Sep. 30, 2026
Subsequent Event [Line Items]
Common stock, dividends declared (in usd per share)				$ 0.65	$ 0.65	$ 0.65	$ 0.62	$ 0.62	$ 0.62
Repurchase of common shares				$ 214
Remaining authorized repurchase amount				$ 768						$ 768
Issued Common Shares
Subsequent Event [Line Items]
Repurchase of common shares (in shares)				817,041						3,101,650
Repurchase of common shares				$ 161
Subsequent Event
Subsequent Event [Line Items]
Common stock, dividends paid (in usd per share)	$ 0.65
Common stock, dividends declared (in usd per share)		$ 0.65
Remaining authorized repurchase amount			$ 751
Subsequent Event \| Issued Common Shares
Subsequent Event [Line Items]
Repurchase of common shares (in shares)			235,276
Repurchase of common shares			$ 17
Subsequent Event \| Partnerships Exchangeable Units \| Restaurant Brands International Limited Partnership
Subsequent Event [Line Items]
Distribution in respect of each Partnership exchangeable unit (in usd per share)	$ 0.65	$ 0.65