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PROPERTY, PLANT, EQUIPMENT AND MINING DEVELOPMENT COSTS, NET
 12 Months Ended
Dec. 31, 2020
Property, Plant and Equipment, Net [Abstract]  
Property, Plant, Equipment and Mining Development Costs, Net PROPERTY, PLANT, EQUIPMENT AND MINE DEVELOPMENT COSTS, NET
The components of net property, plant, equipment and mine development costs follow:
 December 31,
 20202019
Proven and probable mineral reserves$7,142 $7,087 
VBPP376 465 
Mine development and other10,686 8,180 
Buildings and infrastructure9,214 8,435 
Machinery and equipment14,235 13,312 
Mobile equipment4,495 4,320 
Construction in progress1,454 4,265 
Oil and gas properties27,281 27,293 
Total74,883 73,357 
Accumulated depreciation, depletion, and amortizationa
(45,065)(43,773)
Property, plant, equipment and mine development costs, net$29,818 $29,584 
a.Includes accumulated amortization for oil and gas properties of $27.3 billion at December 31, 2020 and 2019.

FCX recorded $1.6 billion for VBPP in connection with the FMC acquisition in 2007 (excluding $634 million associated with mining operations that were subsequently sold) and transferred $811 million to proven and probable mineral reserves through 2020 (less than $0.1 million in 2020 and none in 2019). Cumulative impairments of and adjustments to VBPP total $497 million, which were primarily recorded in 2008.

Capitalized interest, which primarily related to FCX’s mining operations’ capital projects, totaled $147 million in 2020, $149 million in 2019 and $96 million in 2018.

During 2020 and 2019, no material impairments of FCX’s long-lived mining assets were recorded.