Exchange Notice, Limited Partners' Capital Account, Units

No definition available.

Name:	qsr_ExchangeNoticeLimitedPartnersCapitalAccountUnits
Namespace Prefix:	qsr_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	instant

- Definition

Aggregate dividends paid during the period for each share of common stock outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

+ Details

Name:	us-gaap_CommonStockDividendsPerShareCashPaid
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Aggregate dividends declared during the period for each share of common stock outstanding.

+ References

+ Details

Name:	us-gaap_CommonStockDividendsPerShareDeclared
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Per unit of ownership amount of cash distributions declared to unit-holder of a limited partnership (LP).

+ References

+ Details

Name:	us-gaap_DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow for the extinguishment of long-term borrowing, with the highest claim on the assets of the entity in case of bankruptcy or liquidation, before its maturity.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

+ Details

Name:	us-gaap_EarlyRepaymentOfSeniorDebt
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The cash outflow to reacquire common and preferred stock.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=121586364&loc=d3e3291-108585

+ Details

Name:	us-gaap_PaymentsForRepurchaseOfEquity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03.16(a))
-URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03.16)
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

+ Details

Name:	us-gaap_SeniorNotes
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

Name:	us-gaap_SubsequentEventLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_DebtInstrumentAxis=qsr_TwoThousandSeventeenSeniorNotesDueOctoberFifteenTwoThousandTwentyFiveMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_StatementScenarioAxis=srt_ScenarioForecastMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=qsr_TwoThousandSeventeenSeniorNotesDueMayFifteenTwoThousandTwentyFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=qsr_SeniorNotes400DueOctober152030Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=qsr_November2020400SeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=qsr_A350SeniorNotesDueFebruary152029Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=qsr_PartnershipsWithExchangeableUnitsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=qsr_RestaurantBrandsInternationalLimitedPartnershipMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent Events - Additional Information (Details) - USD ($) $ / shares in Units, $ in Millions			1 Months Ended		3 Months Ended
	Oct. 05, 2020	Oct. 02, 2020	Nov. 30, 2020	Oct. 27, 2020	Sep. 30, 2020	Jun. 30, 2020	Mar. 31, 2020	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Oct. 20, 2020	Oct. 14, 2020	Dec. 31, 2019	Aug. 28, 2017	May 17, 2017
Subsequent Event [Line Items]
Cash dividend declared by board (in usd per share)					$ 0.78	$ 0.78	$ 0.77	$ 0.70	$ 0.63	$ 0.63
2017 5.00% Senior Notes (due October 15, 2025)
Subsequent Event [Line Items]
Stated interest rate (as a percent)					5.00%									5.00%
Senior notes					$ 2,800								$ 2,800
2017 5.00% Senior Notes (due October 15, 2025) \| Forecast
Subsequent Event [Line Items]
Principal amount redeemed			$ 1,450
2017 4.25% Senior Notes (due May 15, 2024)
Subsequent Event [Line Items]
Stated interest rate (as a percent)					4.25%										4.25%
Senior notes					$ 1,500								$ 1,500
2017 4.25% Senior Notes (due May 15, 2024) \| Forecast
Subsequent Event [Line Items]
Principal amount redeemed				$ 725
Subsequent Event
Subsequent Event [Line Items]
Common stock dividends paid (in usd per share)		$ 0.52
Cash dividend declared by board (in usd per share)				$ 0.52
Subsequent Event \| 2020 4.00% Senior Notes (due October 15, 2030) \| Senior Notes
Subsequent Event [Line Items]
Stated interest rate (as a percent)	4.00%
Subsequent Event \| 2017 5.00% Senior Notes (due October 15, 2025)
Subsequent Event [Line Items]
Principal amount redeemed	$ 1,350
Subsequent Event \| November 2020 4.00% Senior Notes \| Senior Notes
Subsequent Event [Line Items]
Stated interest rate (as a percent)												4.00%
Subsequent Event \| 3.50% Senior Notes (Due February 15, 2029) \| Senior Notes
Subsequent Event [Line Items]
Stated interest rate (as a percent)											3.50%
Partnership exchangeable units
Subsequent Event [Line Items]
Exchange notice, partnership exchangeable units (in shares)					6,757,692
Partnership exchangeable units \| Subsequent Event
Subsequent Event [Line Items]
Payments for repurchase of equity		$ 380
Partnership exchangeable units \| Restaurant Brands International Limited Partnership \| Subsequent Event
Subsequent Event [Line Items]
Cash dividend paid per exchangeable unit (in usd per unit)		$ 0.52		$ 0.52