Condensed Consolidated Statements of Shareholders' Equity - USD ($) $ in Millions	Total	Cumulative Effect, Period of Adoption, Adjustment	Issued Common Shares	Retained Earnings	Retained Earnings Cumulative Effect, Period of Adoption, Adjustment	Accumulated Other Comprehensive Income (Loss)	Noncontrolling Interest	Noncontrolling Interest Cumulative Effect, Period of Adoption, Adjustment
Beginning balances (in shares) at Dec. 31, 2018			251,532,493
Beginning balances at Dec. 31, 2018	$ 3,618	$ 21	$ 1,737	$ 674	$ 12	$ (800)	$ 2,007	$ 9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)			2,019,620
Stock option exercises	42		$ 42
Share-based compensation	22		$ 22
Issuance of shares (in shares)			134,809
Issuance of shares	7		$ 7
Dividends declared	(127)			(127)
Dividend equivalents declared on restricted stock units	0		$ 2	(2)
Distributions declared by Partnership on Partnership exchangeable units	(104)						(104)
Exchange of partnership exchangeable units for RBI common shares (in shares)			141,190
Exchange of Partnership exchangeable units for RBI common shares	0		$ 2			(1)	(1)
Net income	246			135			111
Other comprehensive income (loss)	48					26	22
Ending balances (in shares) at Mar. 31, 2019			253,828,112
Ending balances at Mar. 31, 2019	3,773		$ 1,812	692		(775)	2,044
Beginning balances (in shares) at Dec. 31, 2018			251,532,493
Beginning balances at Dec. 31, 2018	3,618	$ 21	$ 1,737	674	$ 12	(800)	2,007	$ 9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	854
Other comprehensive income (loss)	103
Ending balances (in shares) at Sep. 30, 2019			298,095,767
Ending balances at Sep. 30, 2019	4,063		$ 2,460	762		(864)	1,705
Beginning balances (in shares) at Mar. 31, 2019			253,828,112
Beginning balances at Mar. 31, 2019	3,773		$ 1,812	692		(775)	2,044
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)			1,697,488
Stock option exercises	38		$ 38
Share-based compensation	17		$ 17
Issuance of shares (in shares)			59,970
Issuance of shares	0		$ 0
Dividends declared	(128)			(128)
Dividend equivalents declared on restricted stock units	0		$ 2	(2)
Distributions declared by Partnership on Partnership exchangeable units	(103)						(103)
Exchange of partnership exchangeable units for RBI common shares (in shares)			45,325
Exchange of Partnership exchangeable units for RBI common shares	0		$ 1				(1)
Restaurant VIE contributions (distributions)	1						1
Net income	257			142			115
Other comprehensive income (loss)	105					58	47
Ending balances (in shares) at Jun. 30, 2019			255,630,895
Ending balances at Jun. 30, 2019	3,960		$ 1,870	704		(717)	2,103
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)			636,918
Stock option exercises	19		$ 19
Share-based compensation	17		$ 17
Issuance of shares (in shares)			20,700
Issuance of shares	0
Dividends declared	(141)			(141)
Dividend equivalents declared on restricted stock units	0		$ 2	(2)
Distributions declared by Partnership on Partnership exchangeable units	(92)						(92)
Exchange of partnership exchangeable units for RBI common shares (in shares)			41,807,254
Exchange of Partnership exchangeable units for RBI common shares	0		$ 552			(118)	(434)
Restaurant VIE contributions (distributions)	(1)						(1)
Net income	351			201			150
Other comprehensive income (loss)	(50)					(29)	(21)
Ending balances (in shares) at Sep. 30, 2019			298,095,767
Ending balances at Sep. 30, 2019	$ 4,063		$ 2,460	762		(864)	1,705
Beginning balances (in shares) at Dec. 31, 2019	298,281,081		298,281,081
Beginning balances at Dec. 31, 2019	$ 4,259		$ 2,478	775		(763)	1,769
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)			1,053,264
Stock option exercises	30		$ 30
Share-based compensation	19		$ 19
Issuance of shares (in shares)			255,325
Issuance of shares	6		$ 6
Dividends declared	(156)			(156)
Dividend equivalents declared on restricted stock units	0		$ 2	(2)
Distributions declared by Partnership on Partnership exchangeable units	(86)						(86)
Exchange of partnership exchangeable units for RBI common shares (in shares)			178,046
Exchange of Partnership exchangeable units for RBI common shares	0		$ 2				(2)
Restaurant VIE contributions (distributions)	(1)						(1)
Net income	224			144			80
Other comprehensive income (loss)	(543)					(350)	(193)
Ending balances (in shares) at Mar. 31, 2020			299,767,716
Ending balances at Mar. 31, 2020	$ 3,752		$ 2,537	761		(1,113)	1,567
Beginning balances (in shares) at Dec. 31, 2019	298,281,081		298,281,081
Beginning balances at Dec. 31, 2019	$ 4,259		$ 2,478	775		(763)	1,769
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	611
Other comprehensive income (loss)	$ (348)
Ending balances (in shares) at Sep. 30, 2020	303,877,203		303,877,203
Ending balances at Sep. 30, 2020	$ 3,915		$ 2,648	692		(997)	1,572
Beginning balances (in shares) at Mar. 31, 2020			299,767,716
Beginning balances at Mar. 31, 2020	3,752		$ 2,537	761		(1,113)	1,567
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)			316,172
Stock option exercises	11		$ 11
Share-based compensation	20		$ 20
Issuance of shares (in shares)			45,071
Issuance of shares	0		$ 0
Dividends declared	(158)			(158)
Dividend equivalents declared on restricted stock units	0		$ 1	(1)
Distributions declared by Partnership on Partnership exchangeable units	(85)						(85)
Exchange of partnership exchangeable units for RBI common shares (in shares)			2,494,854
Exchange of Partnership exchangeable units for RBI common shares	0		$ 33			(9)	(24)
Restaurant VIE contributions (distributions)	(1)						(1)
Net income	164			106			58
Other comprehensive income (loss)	149					97	52
Ending balances (in shares) at Jun. 30, 2020			302,623,813
Ending balances at Jun. 30, 2020	3,852		$ 2,602	708		(1,025)	1,567
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock option exercises (in shares)			567,636
Stock option exercises	19		$ 19
Share-based compensation	16		$ 16
Issuance of shares (in shares)			63,686
Dividends declared	(158)			(158)
Dividend equivalents declared on restricted stock units			$ 3	(3)
Distributions declared by Partnership on Partnership exchangeable units	(84)						(84)
Exchange of partnership exchangeable units for RBI common shares (in shares)			622,068
Exchange of Partnership exchangeable units for RBI common shares			$ 8			(2)	(6)
Restaurant VIE contributions (distributions)	1						1
Net income	223			145			78
Other comprehensive income (loss)	$ 46					30	16
Ending balances (in shares) at Sep. 30, 2020	303,877,203		303,877,203
Ending balances at Sep. 30, 2020	$ 3,915		$ 2,648	$ 692		$ (997)	$ 1,572