XML 41 R30.htm IDEA: XBRL DOCUMENT v3.10.0.1
Income Taxes (Tables)
 6 Months Ended
Jun. 30, 2018
Income Tax Disclosure [Abstract]  
Differences Between The 35 Percent Statutory Income Tax Rate And Effective Income Tax Rate
The differences between the 21 percent and 35 percent statutory federal income tax rates and our effective income tax rate were as follows:
(Dollars in millions)
 
Three months ended June 30,
 
Six months ended June 30,
 
 
2018
 
2017
 
2018
 
2017
Tax at statutory rate:
 
$
56

 
21.0
 %
 
$
44

 
35.0
 %
 
$
45

 
21.0
 %
 
$
141

 
35.0
 %
Increase (decrease) resulting from:
 
 

 
 

 
 

 
 

 
 

 
 

 
 

 
 

Tax-exempt income from municipal bonds
 
(5
)
 
(1.9
)
 
(9
)
 
(7.0
)
 
(10
)
 
(4.7
)
 
(18
)
 
(4.5
)
Dividend received exclusion
 
(5
)
 
(1.5
)
 
(9
)
 
(7.0
)
 
(8
)
 
(3.7
)
 
(17
)
 
(4.2
)
Other
 
1

 
0.2

 
2

 
0.9

 
1

 
0.5

 
(3
)
 
(0.8
)
Provision for income taxes
 
$
47

 
17.8
 %
 
$
28

 
21.9
 %
 
$
28

 
13.1
 %
 
$
103

 
25.5
 %