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Acquisitions and Dispositions - Held For Sale (Details) - Disposal Group, Held-for-sale or Disposed of by Sale, Not Discontinued Operations
$ in Millions
Mar. 31, 2021
USD ($)
East and West  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Current assets - discontinued operations $ 55
Property, plant and equipment, net 385
Other non-current assets 3
Noncurrent assets 388
Total assets held for sale 443
Current liabilities 27
Non-current liabilities 60
Total liabilities held for sale 87
East  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Property, plant and equipment, net 237
West/Services/Other  
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]  
Property, plant and equipment, net $ 148