Supplemental Financial Information - Condensed Consolidating Statements of Cash Flows (Detail) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2017	Sep. 30, 2016	Sep. 30, 2017	Sep. 30, 2016
Cash flows from operating activities:
Net income (loss)	$ 246.8	$ 238.6	$ 656.9	$ 654.5
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in loss (earnings) of consolidated subsidiaries	0.0	0.0	0.0	0.0
Depreciation and amortization			134.9	129.0
Premiums paid and non-cash loss on early extinguishment of debt			75.9	0.0
Amortization of deferred financing costs and debt issuance discount	8.5	9.8	25.2	29.1
(Income) loss from equity method investments	(4.1)	(2.6)	(8.9)	(16.6)
Loss (gain) on remeasurement of foreign denominated transactions			64.7	16.1
Net losses on derivatives			23.1	15.3
Share-based compensation expense			38.0	25.9
Deferred income taxes			(3.1)	34.6
Other			12.8	8.0
Changes in current assets and liabilities, excluding acquisitions and dispositions:
Accounts and notes receivable			0.3	20.0
Inventories and prepaids and other current assets			(12.5)	(3.0)
Accounts and drafts payable			(30.4)	11.8
Advertising fund restricted assets and fund liabilities			18.1	4.0
Other accrued liabilities and gift card liability			(161.4)	(23.8)
Other long-term assets and liabilities			(40.0)	0.9
Net cash provided by operating activities			793.6	905.8
Cash flows from investing activities:
Payments for property and equipment			(16.9)	(18.2)
Proceeds from disposal of assets, restaurant closures, and refranchisings			19.6	18.1
Net payment for purchase of Popeyes, net of cash acquired			(1,635.9)	0.0
Return of investment on direct financing leases			11.8	12.5
Settlement/sale of derivatives, net			771.8	4.9
Other investing activities, net			(2.3)	2.0
Net cash provided by (used for) investing activities			(851.9)	19.3
Cash flows from financing activities:
Proceeds from issuance of long-term debt			4,350.0	0.0
Repayments of long-term debt and capital leases			(1,690.0)	(52.7)
Payment of financing costs			(57.0)	0.0
Distributions on common, preferred and Partnership exchangeable units			(451.9)	(396.9)
Capital contribution from RBI Inc.			17.5	12.5
Distributions to RBI Inc.			0.0	(28.5)
Distributions from subsidiaries			0.0	0.0
Other financing activities, net			(6.2)	0.8
Net cash provided by (used for) financing activities			2,162.4	(464.8)
Effect of exchange rates on cash and cash equivalents			22.7	14.6
Increase (decrease) in cash and cash equivalents			2,126.8	474.9
Cash and cash equivalents at beginning of period			1,420.4	753.7
Cash and cash equivalents at end of period	3,547.2	1,228.6	3,547.2	1,228.6
Eliminations
Cash flows from operating activities:
Net income (loss)	(246.8)	(238.6)	(656.9)	(654.5)
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in loss (earnings) of consolidated subsidiaries	246.8	238.6	656.9	654.5
Depreciation and amortization			0.0	0.0
Premiums paid and non-cash loss on early extinguishment of debt			0.0
Amortization of deferred financing costs and debt issuance discount			0.0	0.0
(Income) loss from equity method investments			0.0	0.0
Loss (gain) on remeasurement of foreign denominated transactions			0.0	0.0
Net losses on derivatives			0.0	0.0
Share-based compensation expense			0.0	0.0
Deferred income taxes			0.0	0.0
Other			0.0	0.0
Changes in current assets and liabilities, excluding acquisitions and dispositions:
Accounts and notes receivable			0.0	0.0
Inventories and prepaids and other current assets			0.0	0.0
Accounts and drafts payable			0.0	0.0
Advertising fund restricted assets and fund liabilities			0.0	0.0
Other accrued liabilities and gift card liability			0.0	0.0
Other long-term assets and liabilities			0.0	0.0
Net cash provided by operating activities			0.0	0.0
Cash flows from investing activities:
Payments for property and equipment			0.0	0.0
Proceeds from disposal of assets, restaurant closures, and refranchisings			0.0	0.0
Net payment for purchase of Popeyes, net of cash acquired			0.0
Return of investment on direct financing leases			0.0	0.0
Settlement/sale of derivatives, net			0.0	0.0
Other investing activities, net			0.0	0.0
Net cash provided by (used for) investing activities			0.0	0.0
Cash flows from financing activities:
Proceeds from issuance of long-term debt			0.0
Repayments of long-term debt and capital leases			0.0	0.0
Payment of financing costs			0.0
Distributions on common, preferred and Partnership exchangeable units			0.0	0.0
Capital contribution from RBI Inc.			0.0	0.0
Distributions to RBI Inc.				0.0
Distributions from subsidiaries			0.0	0.0
Other financing activities, net			0.0	0.0
Net cash provided by (used for) financing activities			0.0	0.0
Effect of exchange rates on cash and cash equivalents			0.0	0.0
Increase (decrease) in cash and cash equivalents			0.0	0.0
Cash and cash equivalents at beginning of period			0.0	0.0
Cash and cash equivalents at end of period	0.0	0.0	0.0	0.0
Consolidated Borrowers
Cash flows from operating activities:
Net income (loss)	246.8	238.6	656.9	654.5
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in loss (earnings) of consolidated subsidiaries	0.0	0.0	0.0	0.0
Depreciation and amortization			134.9	129.0
Premiums paid and non-cash loss on early extinguishment of debt			75.9
Amortization of deferred financing costs and debt issuance discount			25.2	29.1
(Income) loss from equity method investments	(4.1)	(2.6)	(8.9)	(16.6)
Loss (gain) on remeasurement of foreign denominated transactions			64.7	16.1
Net losses on derivatives			23.1	15.3
Share-based compensation expense			38.0	25.9
Deferred income taxes			(3.1)	34.6
Other			12.8	8.0
Changes in current assets and liabilities, excluding acquisitions and dispositions:
Accounts and notes receivable			0.3	20.0
Inventories and prepaids and other current assets			(12.5)	(3.0)
Accounts and drafts payable			(30.4)	11.8
Advertising fund restricted assets and fund liabilities			18.1	4.0
Other accrued liabilities and gift card liability			(161.4)	(23.8)
Other long-term assets and liabilities			(40.0)	0.9
Net cash provided by operating activities			793.6	905.8
Cash flows from investing activities:
Payments for property and equipment			(16.9)	(18.2)
Proceeds from disposal of assets, restaurant closures, and refranchisings			19.6	18.1
Net payment for purchase of Popeyes, net of cash acquired			(1,635.9)
Return of investment on direct financing leases			11.8	12.5
Settlement/sale of derivatives, net			771.8	4.9
Other investing activities, net			(2.3)	2.0
Net cash provided by (used for) investing activities			(851.9)	19.3
Cash flows from financing activities:
Proceeds from issuance of long-term debt			4,350.0
Repayments of long-term debt and capital leases			(1,690.0)	(52.7)
Payment of financing costs			(57.0)
Distributions on common, preferred and Partnership exchangeable units			0.0	0.0
Capital contribution from RBI Inc.			17.5	0.0
Distributions to RBI Inc.				0.0
Distributions from subsidiaries			(451.9)	(412.9)
Other financing activities, net			(6.2)	0.8
Net cash provided by (used for) financing activities			2,162.4	(464.8)
Effect of exchange rates on cash and cash equivalents			22.7	14.6
Increase (decrease) in cash and cash equivalents			2,126.8	474.9
Cash and cash equivalents at beginning of period			1,420.4	753.7
Cash and cash equivalents at end of period	3,547.2	1,228.6	3,547.2	1,228.6
RBILP
Cash flows from operating activities:
Net income (loss)	246.8	238.6	656.9	654.5
Adjustments to reconcile net income to net cash provided by operating activities:
Equity in loss (earnings) of consolidated subsidiaries	(246.8)	(238.6)	(656.9)	(654.5)
Depreciation and amortization			0.0	0.0
Premiums paid and non-cash loss on early extinguishment of debt			0.0
Amortization of deferred financing costs and debt issuance discount			0.0	0.0
(Income) loss from equity method investments			0.0	0.0
Loss (gain) on remeasurement of foreign denominated transactions			0.0	0.0
Net losses on derivatives			0.0	0.0
Share-based compensation expense			0.0	0.0
Deferred income taxes			0.0	0.0
Other			0.0	0.0
Changes in current assets and liabilities, excluding acquisitions and dispositions:
Accounts and notes receivable			0.0	0.0
Inventories and prepaids and other current assets			0.0	0.0
Accounts and drafts payable			0.0	0.0
Advertising fund restricted assets and fund liabilities			0.0	0.0
Other accrued liabilities and gift card liability			0.0	0.0
Other long-term assets and liabilities			0.0	0.0
Net cash provided by operating activities			0.0	0.0
Cash flows from investing activities:
Payments for property and equipment			0.0	0.0
Proceeds from disposal of assets, restaurant closures, and refranchisings			0.0	0.0
Net payment for purchase of Popeyes, net of cash acquired			0.0
Return of investment on direct financing leases			0.0	0.0
Settlement/sale of derivatives, net			0.0	0.0
Other investing activities, net			0.0	0.0
Net cash provided by (used for) investing activities			0.0	0.0
Cash flows from financing activities:
Proceeds from issuance of long-term debt			0.0
Repayments of long-term debt and capital leases			0.0	0.0
Payment of financing costs			0.0
Distributions on common, preferred and Partnership exchangeable units			(451.9)	(396.9)
Capital contribution from RBI Inc.			0.0	12.5
Distributions to RBI Inc.				(28.5)
Distributions from subsidiaries			451.9	412.9
Other financing activities, net			0.0	0.0
Net cash provided by (used for) financing activities			0.0	0.0
Effect of exchange rates on cash and cash equivalents			0.0	0.0
Increase (decrease) in cash and cash equivalents			0.0	0.0
Cash and cash equivalents at beginning of period			0.0	0.0
Cash and cash equivalents at end of period	$ 0.0	$ 0.0	$ 0.0	$ 0.0