Income Taxes (Tables)

3 Months Ended

Mar. 31, 2021

Income Tax Disclosure [Abstract]

Differences Between Statutory Income Tax Rate And Effective Income Tax Rate

The differences between the 21% statutory federal income tax rate and our effective income tax rate were as follows:

(Dollars in millions)	Three months ended March 31,
	2021				2020
Tax at statutory rate:	$	161	21.0	%	$	(331)	21.0	%
Increase (decrease) resulting from:
Tax-exempt income from municipal bonds	(5)		(0.7)		(5)		0.3
Dividend received exclusion	(5)		(0.7)		(4)		0.3
Other	(3)		(0.3)		(10)		0.6
Provision (benefit) for income taxes	$	148	19.3	%	$	(350)	22.2	%