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Leases (Schedule of Right-of-use Assets and Lease Liabilities) (Details) - USD ($)
$ in Millions
Jun. 30, 2023
Dec. 31, 2022
Leases [Abstract]    
Right-of-use assets, finance lease $ 251 $ 203
Finance lease liabilities:    
Current lease liabilities, finance lease [1] 14 8
Long-term lease liabilities, finance lease 295 249
Total lease liabilities, finance lease 309 257
Right-of-use assets, operating lease 15 21
Operating lease liabilities:    
Current lease liabilities, operating lease [1] 10 13
Long-term lease liabilities, operating lease 4 8
Total lease liabilities, operating lease 14 21
Right-of-use assets 266 224
Lease liabilities:    
Current lease liabilities [1] 24 21
Long-term lease liabilities 299 257
Total lease liabilities $ 323 $ 278
[1] Current lease liabilities are included in other current liabilities on the consolidated balance sheets.