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Income And Other Taxes (Schedule Of Income And Other Taxes) (Details) - USD ($)
$ in Millions
 12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Income and Other Taxes [Line Items]      
Current $ 6,050 $ 9,460 $ 7,210
Deferred - net (675) (96) (8,321)
U.S. tax on non-U.S. operations 89 42 17
Total federal and non-U.S. 5,464 9,406 (1,094)
State (182) 126 (80)
Total income tax expense 5,282 9,532 (1,174)
Other taxes and duties 30,525 32,663 30,104
Other taxes and duties included in production and manufacturing expenses 2,196 2,102 1,854
Other taxes and duties included in SG&A expenses 465 465 501
Total other taxes and duties 33,186 35,230 32,459
Total 38,468 44,762 31,285
U.S. [Member]      
Income and Other Taxes [Line Items]      
Current (121) 459 577
Deferred - net (255) 518 (9,075)
U.S. tax on non-U.S. operations 89 42 17
Total federal and non-U.S. (287) 1,019 (8,481)
State (182) 126 (80)
Total income tax expense (469) 1,145 (8,561)
Other taxes and duties 3,566 3,498 3,330
Other taxes and duties included in production and manufacturing expenses 1,385 1,245 1,107
Other taxes and duties included in SG&A expenses 160 153 147
Total other taxes and duties 5,111 4,896 4,584
Total 4,642 6,041 (3,977)
Non-U.S. [Member]      
Income and Other Taxes [Line Items]      
Current 6,171 9,001 6,633
Deferred - net (420) (614) 754
Total federal and non-U.S. 5,751 8,387 7,387
Total income tax expense 5,751 8,387 7,387
Other taxes and duties 26,959 29,165 26,774
Other taxes and duties included in production and manufacturing expenses 811 857 747
Other taxes and duties included in SG&A expenses 305 312 354
Total other taxes and duties 28,075 30,334 27,875
Total $ 33,826 $ 38,721 $ 35,262