Income Taxes (Reconciliation Of Income Tax Expense (Benefit) Based On Federal Statutory Rate To Amount Per Effective Tax Rate) (Details) - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Income Tax Disclosure [Abstract]
Taxes computed at federal statutory rate	$ (650)	$ 6,126	$ (74)
Increases (decreases) in income taxes resulting from:
State and local income taxes – net of federal income tax benefit	795	936	170
CARES Act federal NOL carryback	0	(471)	0
Tax on foreign investments	43	47	(124)
Noncontrolling interest	(308)	(291)	(286)
Permanent items and R&D credit	(121)	(153)	(195)
Audit resolutions	(642)	(220)	(112)
Divestitures	(481)	(558)	107
Goodwill impairment	5,210	16	1,702
Other – net	(66)	(37)	(20)
Total	$ 3,780	$ 5,395	$ 1,168
Effective Tax Rate	(122.20%)	18.50%	(329.90%)

Effective Income Tax Rate Reconciliation, Nondeductible Expense And Tax Credit, Research, Amount

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Percentage of current income tax expense (benefit) and deferred income tax expense (benefit) pertaining to continuing operations.

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