v3.26.1
Other Comprehensive Income (Reclassification out of AOCI) (Details) - USD ($)
$ in Thousands
 3 Months Ended 6 Months Ended
Jul. 04, 2026
Jun. 28, 2025
Jul. 04, 2026
Jun. 28, 2025
Reclassification out of Accumulated Other Comprehensive Income [Line Items]        
Net sales $ 1,724,078 $ 1,481,518 $ 3,274,899 $ 2,862,112
Cost of sales and operating expenses (excludes depreciation and amortization, shown separately below) 1,220,705 1,135,601 2,366,605 2,204,844
Income taxes (110,638) (4,065) (149,264) (2,911)
Amortization of prior service cost 11 (2) 21 (4)
Amortization of actuarial loss (97) 207 (194) 456
Amortization of settlement 0 5,854 0 5,854
Net income attributable to Darling 387,312 12,661 521,625 (13,499)
Reclassification out of Accumulated Other Comprehensive Income [Member]        
Reclassification out of Accumulated Other Comprehensive Income [Line Items]        
Net income attributable to Darling 10,323 (652) 12,269 (12,083)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Derivative Instruments        
Reclassification out of Accumulated Other Comprehensive Income [Line Items]        
Total before tax 9,881 5,309 12,846 (9,089)
Income taxes 379 (1,373) (703) 1,783
Net income attributable to Darling 10,260 3,936 12,143 (7,306)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Derivative Instruments | Foreign Exchange Contract        
Reclassification out of Accumulated Other Comprehensive Income [Line Items]        
Net sales 9,953 851 14,146 4,513
Reclassification out of Accumulated Other Comprehensive Income [Member] | Derivative Instruments | Corn Option        
Reclassification out of Accumulated Other Comprehensive Income [Line Items]        
Cost of sales and operating expenses (excludes depreciation and amortization, shown separately below) 0 (18) 0 (385)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Derivative Instruments | Interest Rate Swap        
Reclassification out of Accumulated Other Comprehensive Income [Line Items]        
Foreign currency gain/(loss) (72) 4,476 (1,300) (13,217)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Foreign Currency Translation        
Reclassification out of Accumulated Other Comprehensive Income [Line Items]        
Total before tax 86 (6,059) 173 (6,306)
Income taxes (23) 1,471 (47) 1,529
Amortization of prior service cost (11) 2 (21) 4
Amortization of actuarial loss 97 (207) 194 (456)
Net income attributable to Darling 63 (4,588) 126 (4,777)
Reclassification out of Accumulated Other Comprehensive Income [Member] | Defined Benefit Pension Plans        
Reclassification out of Accumulated Other Comprehensive Income [Line Items]        
Amortization of settlement $ 0 $ (5,854) $ 0 $ (5,854)