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Discontinued Operations (Results of Operations associated with Discontinued Operations) (Details) - USD ($)
$ in Millions
 3 Months Ended 6 Months Ended
Jun. 30, 2022
Jun. 30, 2021
Jun. 30, 2022
Jun. 30, 2021
Revenues, other income and net gain on disposal of assets:        
Total revenues, other income and net gain on disposal of assets $ 54,238 $ 29,827 $ 92,622 $ 52,709
Costs and expenses:        
Cost of revenues (excludes items below) 44,207 27,177 79,275 48,261
Depreciation and amortization 819 871 [1] 1,624 1,715 [1]
Selling, general and administrative expenses 694 625 1,297 1,200
Other taxes 190 189 382 351
Total costs and expenses 45,910 28,862 82,578 51,527
Income from operations 8,328 965 10,044 1,182
Net interest and other financial costs 312 372 574 725
Income from discontinued operations, net of tax $ 0 8,214 $ 0 8,448
Discontinued Operations, Disposed of by Sale        
Revenues, other income and net gain on disposal of assets:        
Revenues and other income   3,081   8,420
Net gain on disposal of assets   11,682   11,682
Total revenues, other income and net gain on disposal of assets   14,763   20,102
Costs and expenses:        
Cost of revenues (excludes items below)   2,748   7,654
Depreciation and amortization   1   3
Selling, general and administrative expenses   48   121
Other taxes   24   75
Total costs and expenses   2,821   7,853
Income from operations   11,942   12,249
Net interest and other financial costs   2   6
Income before income taxes   11,940   12,243
Provision for income taxes   3,726   3,795
Income from discontinued operations, net of tax   $ 8,214   $ 8,448
[1] The three and six months ended June 30, 2021 includes $43 million of impairments of long lived assets.