Income And Other Taxes (Schedule Of Income And Other Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Income and Other Taxes [Line Items]
Current	$ 9,460	$ 7,210	$ 3,842
Deferred - net	(96)	(8,321)	(4,223)
U.S. tax on non-U.S. operations	42	17	41
Total federal and non-U.S.	9,406	(1,094)	(340)
State	126	(80)	(66)
Total income tax expense	9,532	(1,174)	(406)
Other taxes and duties	32,663	30,104	29,020
Other taxes and duties included in production and manufacturing expenses	2,102	1,854	1,860
Other taxes and duties included in SG&A expenses	465	501	495
Total other taxes and duties	35,230	32,459	31,375
Total	44,762	31,285	30,969
U.S. [Member]
Income and Other Taxes [Line Items]
Current	459	577	(214)
Deferred - net	518	(9,075)	(2,801)
U.S. tax on non-U.S. operations	42	17	41
Total federal and non-U.S.	1,019	(8,481)	(2,974)
State	126	(80)	(66)
Total income tax expense	1,145	(8,561)	(3,040)
Other taxes and duties	3,498	3,330	3,209
Other taxes and duties included in production and manufacturing expenses	1,245	1,107	1,052
Other taxes and duties included in SG&A expenses	153	147	133
Total other taxes and duties	4,896	4,584	4,394
Total	6,041	(3,977)	1,354
Non-U.S. [Member]
Income and Other Taxes [Line Items]
Current	9,001	6,633	4,056
Deferred - net	(614)	754	(1,422)
Total federal and non-U.S.	8,387	7,387	2,634
Total income tax expense	8,387	7,387	2,634
Other taxes and duties	29,165	26,774	25,811
Other taxes and duties included in production and manufacturing expenses	857	747	808
Other taxes and duties included in SG&A expenses	312	354	362
Total other taxes and duties	30,334	27,875	26,981
Total	$ 38,721	$ 35,262	$ 29,615