Income Taxes (Tables)

12 Months Ended

Dec. 31, 2022

Income Tax Disclosure [Abstract]

Schedule of Breakdown of Income Tax Expense Between Current and Deferred

The breakdown of income tax expense between current and deferred is as follows:

	Years Ended
(Dollars in Millions)	2022		2021		2020
Current:
Federal	$	928	$	827	$	559
State	203		176		123
Subtotal Current	$	1,131	$	1,003	$	682
Deferred:
Federal	166		166		149
State	(49)		1		31
Subtotal Deferred	$	117	$	167	$	180
Total Income Tax Expense	$	1,248	$	1,170	$	862

Schedule of Income Tax Expense Reconciled to Tax Computed at Statutory Rates

Income tax expense reconciled to the tax computed at statutory rates is presented in the following table. 

	Years Ended
(Dollars In Millions)	2022				2021				2020
Federal Income Taxes	$	1,137	21.0	%	$	1,040	21.0	%	$	762	21.0	%
State Income Taxes	121		2.2	%	139		2.8	%	117		3.2	%
Other	(10)		(0.1)	%	(9)		(0.2)	%	(17)		(0.4)	%
Income Tax Expense/ Rate	$	1,248	23.1	%	$	1,170	23.6	%	$	862	23.8	%

Schedule of Significant Components of Deferred Income Tax Assets and Liabilities

The significant components of deferred income tax assets and liabilities include:

	2022				2021
(Dollars in Millions)	Assets		Liabilities		Assets		Liabilities
Other Employee Benefit Plans	$	105	$	—	$	106	$	—
Accelerated Depreciation	—		7,600		—		7,366
Other	553		627		499		622
Total	$	658	$	8,227	$	605	$	7,988
Net Deferred Income Tax Liabilities			$	7,569			$	7,383