Segment Reporting (Income from Operations Reconciliation) (Details) - USD ($) $ in Thousands	3 Months Ended			9 Months Ended
	Sep. 26, 2021	Sep. 27, 2020		Sep. 26, 2021	Sep. 27, 2020
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (loss) from operations	$ 14,837	$ (14,255)		$ 230,472	$ (167,735)
Loss on extinguishment and modification of debt	0	0		(2,073)	(237)
Other income (expense), net	5	1		26	(211)
Interest expense, net	(14,245)	(18,300)		(43,863)	(46,647)
Income (loss) before (benefit) provision for income taxes	597	(32,554)		184,562	(214,830)
Operating segments
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (loss) from operations	48,706	21,648		341,745	(40,177)
Operating segments | U.S. segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (loss) from operations	47,294	29,574		334,326	(21,968)
Operating segments | International segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (loss) from operations	1,412	(7,926)		7,419	(18,209)
Corporate, non-segment
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Income (loss) from operations	$ (33,869)	(35,903)	[1]	$ (111,273)	(127,558)	[1]
Corporate, non-segment | Impairment and general and administrative expense
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Restructuring charges		$ 4,200			$ 28,800

[1] The thirteen and thirty-nine weeks ended September 27, 2020 include $4.2 million and $28.8 million, respectively, of charges that were not allocated to the Company’s segments related to its transformational initiatives, primarily recorded within General and administrative expense and Provision for impaired assets and restaurant closings.