Property, Plant and Equipment	3 Months Ended
Apr. 03, 2021
Property Plant And Equipment [Abstract]
Property, Plant and Equipment	3. Property, Plant and Equipment Property, plant and equipment is recorded net of accumulated depreciation of $10.03 billion at April 3, 2021 ($9.86 billion at December 31, 2020). Nucor reviews its natural gas well assets for impairment if and when circumstances indicate that a decline in value below their carrying amounts may have occurred. Nucor last assessed its proved producing natural gas well assets in the fourth quarter of 2020 due to the continued low-price natural gas pricing environment. After completing its assessment, Nucor determined that as of such time there were no impairments of any of its three groups of proved well assets. Changes in the natural gas industry or a prolonged low-price environment beyond what has already been assumed in the assessments could cause management to revise the natural gas and natural gas liquids price assumptions, the estimated reserves or the estimated lease operating costs. Therefore, it is reasonably possible that unfavorable revisions to these assumptions or estimates could result in further impairment of some or all of the groups of proved well assets. The combined carrying value of the three groups of wells was $69.9 million at April 3, 2021 ($71.7 million at December 31, 2020). Nucor owns a 49% leasehold interest in unproved oil and natural gas properties covering approximately 54,000 acres in the South Piceance Basin located in Colorado. Nucor is subject to forfeiture of a portion of its leasehold interest in these properties if we do not drill new wells within various contractually specified time periods. A decision to not develop a portion of these properties within the specified time periods would likely result in a partial asset impairment in the future. The carrying value of the entire leasehold interest at April 3, 2021 was $138.0 million. Nucor has full discretion on its participation in all future drilling capital investments related to the leasehold interest.

Property, Plant and Equipment

3 Months Ended

Apr. 03, 2021

Property Plant And Equipment [Abstract]

3. Property, Plant and Equipment

Property, plant and equipment is recorded net of accumulated depreciation of $10.03 billion at April 3, 2021 ($9.86 billion at December 31, 2020).

Nucor reviews its natural gas well assets for impairment if and when circumstances indicate that a decline in value below their carrying amounts may have occurred. Nucor last assessed its proved producing natural gas well assets in the fourth quarter of 2020 due to the continued low-price natural gas pricing environment. After completing its assessment, Nucor determined that as of such time there were no impairments of any of its three groups of proved well assets. Changes in the natural gas industry or a prolonged low-price environment beyond what has already been assumed in the assessments could cause management to revise the natural gas and natural gas liquids price assumptions, the estimated reserves or the estimated lease operating costs. Therefore, it is reasonably possible that unfavorable revisions to these assumptions or estimates could result in further impairment of some or all of the groups of proved well assets. The combined carrying value of the three groups of wells was $69.9 million at April 3, 2021 ($71.7 million at December 31, 2020).

Nucor owns a 49% leasehold interest in unproved oil and natural gas properties covering approximately 54,000 acres in the South Piceance Basin located in Colorado. Nucor is subject to forfeiture of a portion of its leasehold interest in these properties if we do not drill new wells within various contractually specified time periods. A decision to not develop a portion of these properties within the specified time periods would likely result in a partial asset impairment in the future. The carrying value of the entire leasehold interest at April 3, 2021 was $138.0 million. Nucor has full discretion on its participation in all future drilling capital investments related to the leasehold interest.