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PROPERTY, PLANT AND EQUIPMENT AND OPERATING LEASES
3 Months Ended
Mar. 31, 2024
Property, Plant and Equipment [Abstract]  
PROPERTY, PLANT AND EQUIPMENT AND OPERATING LEASES
NOTE 6. PROPERTY, PLANT AND EQUIPMENT AND OPERATING LEASES
March 31, 2024December 31, 2023
Original cost$27,498 $27,332 
Less: accumulated depreciation and amortization(16,935)(16,678)
Right-of-use operating lease assets1,782 1,840 
Property, plant and equipment – net$12,345 $12,494 

Operating Lease Liabilities. Our consolidated operating lease liabilities, included in All other liabilities in our Statement of Financial Position, were $1,908 million and $1,973 million, as of March 31, 2024 and December 31, 2023, respectively. Expense on our operating lease portfolio, primarily from our long-term fixed leases, was $188 million and $195 million for the three months ended March 31, 2024 and 2023, respectively.