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Property, Plant and Equipment (Tables)
 12 Months Ended
Dec. 31, 2022
Property, Plant and Equipment [Abstract]  
Summary of Property, Plant and Equipment
December 3120222021
(In millions)  
   
Pipeline equipment (net of accumulated depreciation of $4,105 and $3,742)
$8,224 $8,308 
Hotel properties (net of accumulated depreciation of $522 and $472)
916 959 
Other (net of accumulated depreciation of $520 and $522)
374 281 
Construction in process513 340 
Property, plant and equipment$10,027 $9,888 

Depreciation expense and capital expenditures are as follows:

Year Ended December 31
202220212020
 Depre-ciationCapital Expend.Depre-ciationCapital
Expend.		Depre-ciationCapital Expend.
(In millions)      
       
CNA Financial$49 $50 $51 $26 $56 $25 
Boardwalk Pipelines394 352 368 340 361 415 
Loews Hotels & Co64 264 63 100 63 88 
Corporate2 9 21 23 74 90 
Diamond Offshore (a)
119 52 
Total$509 $675 $503 $489 $673 $670 

(a)Amounts presented for Diamond Offshore reflect the period prior to deconsolidation. See Note 2 for further discussion.