Other Comprehensive Income (Schedule of AOCI) (Details) $ in Thousands	3 Months Ended
Apr. 02, 2022 USD ($)
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated Other Comprehensive loss January 1, 2022, attributable to Darling, net of tax	$ (321,690)
Other comprehensive loss before reclassifications	8,735
Amounts reclassified from accumulated other comprehensive loss	2,453
Net current-period other comprehensive income/(loss)	11,188
Noncontrolling interest	867
Accumulated Other Comprehensive loss April 2, 2022, attributable to Darling, net of tax	(311,369)
Foreign Currency Translation [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated Other Comprehensive loss January 1, 2022, attributable to Darling, net of tax	(289,586)
Other comprehensive loss before reclassifications	3,382
Amounts reclassified from accumulated other comprehensive loss	0
Net current-period other comprehensive income/(loss)	3,382
Noncontrolling interest	867
Accumulated Other Comprehensive loss April 2, 2022, attributable to Darling, net of tax	(287,071)
Derivative Instruments [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated Other Comprehensive loss January 1, 2022, attributable to Darling, net of tax	(6,456)
Other comprehensive loss before reclassifications	5,353
Amounts reclassified from accumulated other comprehensive loss	2,024
Net current-period other comprehensive income/(loss)	7,377
Noncontrolling interest	0
Accumulated Other Comprehensive loss April 2, 2022, attributable to Darling, net of tax	921
Defined Benefit Pension Plans [Member]
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Accumulated Other Comprehensive loss January 1, 2022, attributable to Darling, net of tax	(25,648)
Other comprehensive loss before reclassifications	0
Amounts reclassified from accumulated other comprehensive loss	429
Net current-period other comprehensive income/(loss)	429
Noncontrolling interest	0
Accumulated Other Comprehensive loss April 2, 2022, attributable to Darling, net of tax	$ (25,219)

Accumulated Other Comprehensive Income (Loss) [Roll Forward]

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Other Comprehensive Income (Loss), Net Of Reclassification, Net Of Tax

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Amount after tax, before reclassification adjustments of other comprehensive income (loss).

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