Other Comprehensive Income (Reclassification out of AOCI) (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 28, 2024	Sep. 30, 2023	Sep. 28, 2024	Sep. 30, 2023
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Net sales	$ 1,421,891	$ 1,625,204	$ 4,297,482	$ 5,173,997
Cost of sales and operating expenses (excludes depreciation and amortization, shown separately below)	1,108,319	1,238,733	3,353,406	3,965,408
Income taxes	17,471	15,364	12,790	(52,322)
Amortization of prior service cost	(6)	(1)	(18)	(1)
Amortization of actuarial loss	349	434	1,047	1,302
Net income attributable to Darling	16,949	125,026	176,972	563,210
Reclassification out of Accumulated Other Comprehensive Income [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Net income attributable to Darling	(14,101)	23,603	10,563	31,923
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(18,388)	33,427	15,825	46,875
Income taxes	4,549	(9,497)	(4,476)	(13,971)
Net income attributable to Darling	(13,839)	23,930	11,349	32,904
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] | Soybean Meal
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Net sales	0	(322)	33	182
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] | Foreign Exchange Contract
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Net sales	(924)	11,677	6,471	23,950
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] | Corn Option
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Cost of sales and operating expenses (excludes depreciation and amortization, shown separately below)	605	0	605	1,537
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Gain (Loss), Net, Cash Flow Hedge, Parent [Member] | Interest Rate Swap
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Foreign currency gain/(loss)	(18,069)	22,072	8,716	21,206
Reclassification out of Accumulated Other Comprehensive Income [Member] | Accumulated Foreign Currency Adjustment Attributable to Parent [Member]
Reclassification out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	(343)	(433)	(1,029)	(1,301)
Income taxes	81	106	243	320
Amortization of prior service cost	6	1	18	1
Amortization of actuarial loss	(349)	(434)	(1,047)	(1,302)
Net income attributable to Darling	$ (262)	$ (327)	$ (786)	$ (981)