XML 40 R16.htm IDEA: XBRL DOCUMENT v3.22.0.1
Properties
 12 Months Ended
Dec. 31, 2021
Property, Plant and Equipment [Abstract]  
Properties Properties
  AccumulatedNet BookDepreciation
December 31, 2021CostDepreciationValue
Rate (1)
 ($ in millions)
Land$2,453 $— $2,453                 —
Roadway:    
Rail and other track material7,330 (1,907)5,423 2.40 %
Ties5,779 (1,642)4,137 3.44 %
Ballast3,041 (818)2,223 2.79 %
Construction in process339 — 339                 —
Other roadway14,111 (3,733)10,378 2.69 %
Total roadway30,600 (8,100)22,500  
Equipment:    
Locomotives5,695 (1,994)3,701 3.87 %
Freight cars2,701 (1,009)1,692 2.59 %
Computers and software893 (438)455 10.34 %
Construction in process164 — 164                 —
Other equipment1,088 (420)668 4.63 %
Total equipment10,541 (3,861)6,680  
Other property90 (70)20 2.25 %
Total properties$43,684 $(12,031)$31,653  
 
  AccumulatedNet BookDepreciation
December 31, 2020CostDepreciationValue
Rate (1)
 ($ in millions)
Land$2,394 $— $2,394                 —
Roadway:    
Rail and other track material7,153 (1,892)5,261 2.35 %
Ties5,685 (1,601)4,084 3.41 %
Ballast2,973 (774)2,199 2.76 %
Construction in process297 — 297                 —
Other roadway14,320 (3,926)10,394 2.71 %
Total roadway30,428 (8,193)22,235  
Equipment:    
Locomotives5,478 (1,911)3,567 3.56 %
Freight cars2,780 (1,023)1,757 2.59 %
Computers and software732 (391)341 9.86 %
Construction in process333 — 333                 —
Other equipment1,094 (399)695 4.70 %
Total equipment10,417 (3,724)6,693  
Other property91 (68)23 2.24 %
Total properties$43,330 $(11,985)$31,345  

(1)Composite annual depreciation rate for the underlying assets, excluding the effects of the amortization of any deficiency (or excess) that resulted from our depreciation studies.
 
Loss on Asset Disposal

In 2020, we sold 703 locomotives deemed excess and no longer needed for railroad operations. We evaluated these locomotive retirements and concluded they were abnormal (see Note 1). Accordingly, we recorded a $385 million loss to adjust their carrying amount to their estimated fair value, which resulted in a $97 million tax benefit.

Capitalized Interest
 
Total interest cost incurred on debt was $657 million, $639 million, and $620 million during 2021, 2020 and 2019, respectively, of which $11 million, $14 million, and $16 million was capitalized during 2021, 2020 and 2019, respectively.