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Property, Plant and Equipment, Depreciation Expense and Capital Expenditures (Details) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Dec. 31, 2019
Property, Plant and Equipment [Abstract]      
Depreciation $ 503 $ 673 $ 898
Capital expenditures 489 670 1,058
Interest Costs Capitalized 12 14 18
Rigid plastic packaging and recycled resin - Corporate      
Property, Plant and Equipment [Abstract]      
Depreciation 21 74 70
Capital expenditures 23 90 53
Non-insurance warranty – CNA Financial      
Property, Plant and Equipment [Abstract]      
Depreciation 51 56 64
Capital expenditures 26 25 26
Transportation and storage of natural gas and NGLs and other services – Boardwalk Pipelines      
Property, Plant and Equipment [Abstract]      
Depreciation 368 361 348
Capital expenditures 340 415 418
Lodging and related services – Loews Hotels & Co      
Property, Plant and Equipment [Abstract]      
Depreciation 63 63 60
Capital expenditures 100 88 216
Asset impairment charge, after tax   22 77
Diamond Offshore Drilling Inc.      
Property, Plant and Equipment [Abstract]      
Depreciation 119 356
Capital expenditures 52 $ 345
Asset impairment charge, after tax   $ 408