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INCOME TAXES (Tables)
12 Months Ended
Dec. 31, 2010
INCOME TAXES [Abstract]  
Income Tax from Continuing Operations
The income tax expense on income from continuing operations for each of the three years in the period ended December 31, 2010 consisted of the following (in millions):

   
2010
   
2009
   
2008
 
Current:
                       
Federal
 
$
43
   
$
24
   
$
53
 
State and foreign
   
6
     
2
     
4
 
Current
   
49
     
26
     
57
 
Deferred
   
(4
)
   
(21
)
   
(9
)
Total continuing operations tax expense
 
$
45
   
$
5
   
$
48
 

Income Tax Reconciliation
Income tax expense for 2010, 2009, and 2008 differs from amounts computed by applying the statutory federal rate to income from continuing operations before income taxes for the following reasons (in millions):

   
2010
   
2009
   
2008
 
                         
Computed federal income tax expense
 
$
40
   
$
4
   
$
46
 
State income taxes
   
5
     
4
     
3
 
Tax effect of HS&TC consolidation
   
--
     
(2
)
   
--
 
Other-net
   
--
     
(1
)
   
(1
)
Income tax expense
 
$
45
   
$
5
   
$
48
 

Temporary Differences Affecting Deferred Tax Assets and Deferred Tax Liabilities
The tax effects of temporary differences that give rise to significant portions of the deferred tax assets and deferred tax liabilities at December 31 of each year are as follows (in millions):


   
2010
   
2009
 
Deferred tax assets:
               
Benefit plans
 
$
77
   
$
70
 
Insurance reserves
   
10
     
10
 
Capitalized development costs
   
14
     
3
 
Other
   
6
     
9
 
Total deferred tax assets
   
107
     
92
 
                 
Deferred tax liabilities:
               
Basis differences for property and equipment
   
287
     
287
 
Tax-deferred gains on real estate transactions
   
216
     
197
 
Capital Construction Fund
   
3
     
3
 
Joint ventures and other investments
   
7
     
5
 
Other
   
17
     
22
 
Total deferred tax liabilities
   
530
     
514
 
                 
Net deferred tax liability
 
$
423
   
$
422
 

Reconciliation of Unrecognized Tax Benefits
A reconciliation of the beginning and ending amount of gross unrecognized tax benefits is as follows (in millions):

Balance at January 1, 2008
 
$
10
 
Additions for tax positions of prior years
   
--
 
Reductions for tax positions of prior years
   
(1
)
Reductions for lapse of statute of limitations
   
(3
)
Balance at December 31, 2008
   
6
 
Additions for tax positions of prior years
   
--
 
Additions for tax positions of current year
   
3
 
Reductions for tax positions of prior years
   
--
 
Reductions for lapse of statute of limitations
   
(1
)
Balance at December 31, 2009
   
8
 
Additions for tax positions of prior years
   
--
 
Additions for tax positions of current year
   
2
 
Reductions for tax positions of prior years
 
 
(1
)
Reductions for lapse of statute of limitations
   
(1
)
Balance at December 31, 2010
 
$
8