v2.4.0.8
Shareholders' Equity (Tables)
 6 Months Ended
Jun. 30, 2013
Shareholders' Equity  
Changes in accumulated other comprehensive income, net of tax
For the three and six months ended June 30, 2013 and 2012, the changes in accumulated other comprehensive loss, presented net of tax, were as follows (in millions):
 
   
Three months ended June 30, 2013
    
Three months ended June 30, 2012
  
   
Defined benefit pension plans
    
Derivative instruments
    
Marketable securities
    
Total
    
Defined benefit pension plans
    
Derivative instruments
    
Marketable securities
    
Total
  
Balance, beginning of period
  
$
(533
)
  
$
(7
)
  
$
—
    
$
(540
)
  
$
(517
)
  
$
(12
)
  
$
(2)
    
$
(531
)
Other comprehensive income (loss) before reclassifications
    
84
      
(1
)
    
—
      
83
      
1
      
(2
)
    
—
      
(1
)
Reclassifications to net income
    
12
      
11
      
—
      
23
      
10
      
6
      
—
      
16
  
Other comprehensive income, net
    
96
      
10
      
—
      
106
      
11
      
4
      
—
      
15
  
Balance, end of period
  
$
(437
)
  
$
3
    
$
—
    
$
(434
)
  
$
(506
)
  
$
(8
)
  
$
(2)
    
$
(516
)
 

 
   
Six months ended June 30, 2013
    
Six months ended June 30, 2012
  
   
Defined benefit pension plans
    
Derivative instruments
    
Marketable securities
    
Total
    
Defined benefit pension plans
    
Derivative instruments
    
Marketable securities
    
Total
  
Balance, beginning of period
  
$
(511
)
  
$
(10
)
  
$
—
    
$
(521
)
  
$
(501
)
  
$
7
    
$
(2
)
  
$
(496)
  
Reclassification from redeemable noncontrolling interest
    
—
      
—
      
—
      
—
      
—
      
(17
)
    
—
      
(17
)
Other comprehensive income (loss) before reclassifications
    
49
      
(5
)
    
—
      
44
      
(27
)
    
(1
)
    
—
      
(28
)
Reclassifications to net income
    
25
      
18
      
—
      
43
      
22
      
3
      
—
      
25
  
Other comprehensive income (loss), net
    
74
      
13
      
—
      
87
      
(5
)
    
(15
)
    
—
      
(20
)
Balance, end of period
  
$
(437
)
  
$
3
    
$
—
    
$
(434
)
  
$
(506
)
  
$
(8
)
  
$
(2
)
  
$
(516
)
Schedule of significant reclassifications from accumulated other comprehensive income to net income
Significant reclassifications from accumulated other comprehensive income to net income included the following (in millions):
 
   
Statement of operations classification
    
Three months ended
June 30,
    
Six months ended
June 30,
  
       
2013
    
2012
    
2013
    
2012
  
Defined benefit pension plans
                                      
Actuarial losses
        
$
14
    
$
11
    
$
28
    
$
22
  
Prior service costs
          
(1
)
    
(1
)
    
(1
)
    
(1
)
Settlements and curtailments
          
—
      
—
      
—
      
2
  
Total amortization, before income taxes
  
Net periodic benefit costs (a)
      
13
      
10
      
27
      
23
  
Income tax benefit
  
Income tax expense
      
(1
)
    
—
      
(2
)
    
(1
)
Total amortization, net of income taxes
        
$
12
    
$
10
    
$
25
    
$
22
  
_____________________________
(a)
We recognize the amortization of accumulated other comprehensive income components related to defined benefit pension plans in net periodic benefit costs.  In the three and six months ended June 30, 2013, the amortization components of our net periodic benefit costs were $10 million and $21 million, recorded in operating and maintenance costs, and $3 million and $6 million, recorded in general and administrative costs, respectively.  In the three and six months ended June 30, 2012, the amortization components of our net periodic benefit costs were $8 million and $17 million, recorded in operating and maintenance costs, and $2 million and $6 million, recorded in general and administrative costs, respectively.  See Note 12—Postemployment Benefit Plans.