Taxes - Schedule of Deferred Taxes (Detail) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Deferred Tax Assets
Employee benefits	$ 3,888	$ 4,388
Tax loss, credit, and other carry forwards	1,940	2,224
Other - assets	6,986	7,314
Deferred tax assets, gross	12,814	13,926
Valuation allowances	(1,347)	(1,574)
Deferred tax assets	11,467	12,352
Deferred Tax Liabilities
Spectrum and other intangible amortization	25,851	24,935
Depreciation	21,388	19,893
Other - liabilities	7,496	8,041
Deferred tax liabilities	54,735	52,869
Net deferred tax liability	$ 43,268	$ 40,517