Consolidated Statements of Comprehensive Income - USD ($) $ in Thousands	12 Months Ended
	Dec. 30, 2017	Dec. 31, 2016	Dec. 26, 2015
Statement of Comprehensive Income [Abstract]
Net income including noncontrolling interests	$ 350,909	$ 195,576	$ 105,229
Other comprehensive income (loss), net:
Effect of foreign currency translation, net of deferred tax expense (benefit) of $621, $(638), and $524 for the fiscal years ended December 30, 2017, December 31, 2016, and December 26, 2015, respectively	14,780	(2,560)	(6,721)
Effect of interest rate swaps, net of deferred tax benefit of $778, $882, and $867 for the fiscal years ended December 30, 2017, December 31, 2016, and December 26, 2015, respectively	(1,144)	(1,299)	(1,273)
Effect of pension plan, net of deferred tax expense of $866 for the fiscal year ended December 26, 2015	0	0	2,874
Other	658	(79)	(949)
Total other comprehensive income (loss), net	14,294	(3,938)	(6,069)
Comprehensive income including noncontrolling interests	365,203	191,638	99,160
Comprehensive income attributable to noncontrolling interests	0	0	2
Comprehensive income attributable to Dunkin’ Brands	$ 365,203	$ 191,638	$ 99,158