v2.4.0.6
Stockholders' equity
 12 Months Ended
Dec. 31, 2012
Equity [Abstract]  
Stockholders' equity
Stockholders’ equity
Stock repurchase program
Activity under our stock repurchase program was as follows for the years ended December 31, 2012, 2011 and 2010 (in millions):
 
2012
 
2011
 
2010
 
Shares
 
Dollars
 
Shares
 
Dollars
 
Shares
 
Dollars
First quarter
21.0

 
$
1,429

 
—

 
$
—

 
29.1

 
$
1,684

Second quarter
17.4

 
1,203

 
12.9

 
732

 
10.3

 
616

Third quarter
9.7

 
797

 
45.4

 
2,421

 
6.6

 
364

Fourth quarter
14.2

 
1,233

 
86.0

 
5,154

(1) 
20.5

 
1,136

Total stock repurchases
62.3
 
$
4,662

 
144.3

 
$
8,307

 
66.5

 
$
3,800

___________
(1)
Includes the repurchase of 83.3 million shares of our common stock at an average price paid per share of $60.08, including related expenses, for an aggregate cost of $5.0 billion, under a modified Dutch auction tender offer.
In December 2012, the Board of Directors approved an increase in the share repurchase authorization by $2.0 billion, and as of December 31, 2012, $2.3 billion remained available under this stock repurchase program.
Dividends
On July 28 and October 13, 2011, the Board of Directors declared quarterly cash dividends of $0.28 per share of common stock, which were paid on September 8 and December 8, 2011, respectively. On December 15, 2011, and March 15, July 19 and October 10, 2012, the Board of Directors declared quarterly cash dividends of $0.36 per share of common stock, which were paid on March 7, June 7, September 7 and December 7, 2012, respectively. Additionally, on December 13, 2012, the Board of Directors declared a quarterly cash dividend of $0.47 per share of common stock, which will be paid on March 7, 2013.
Accumulated other comprehensive income
The components of Accumulated other comprehensive income (AOCI) are as follows for the years ended December 31, 2012, 2011 and 2010 (in millions):
 
Foreign
currency
translation
 
Cash flow
hedges
 
Available-for-sale
securities
 
Other
 
AOCI
Balance as of December 31, 2009
$
40

 
$
(82
)
 
$
95

 
$
(8
)
 
$
45

Foreign currency translation adjustments
(29
)
 
—

 
—

 
—

 
(29
)
Unrealized gains
—

 
186

 
155

 
1

 
342

Reclassification adjustments to income
—

 
(46
)
 
(90
)
 
—

 
(136
)
Income taxes
11

 
(55
)
 
(25
)
 
—

 
(69
)
Balance as of December 31, 2010
22

 
3

 
135

 
(7
)
 
153

Foreign currency translation adjustments
(6
)
 
—

 
—

 
—

 
(6
)
Unrealized (losses) gains
—

 
(51
)
 
125

 
2

 
76

Reclassification adjustments to income
—

 
112

 
(154
)
 
—

 
(42
)
Other
—

 
—

 
—

 
(8
)
 
(8
)
Income taxes
5

 
(21
)
 
14

 
—

 
(2
)
Balance as of December 31, 2011
21

 
43

 
120

 
(13
)
 
171

Foreign currency translation adjustments
(13
)
 
—

 
—

 
—

 
(13
)
Unrealized (losses) gains
—

 
15

 
233

 
(1
)
 
247

Reclassification adjustments to income
—

 
(134
)
 
(132
)
 
—

 
(266
)
Income taxes
4

 
41

 
(38
)
 
—

 
7

Balance as of December 31, 2012
$
12

 
$
(35
)
 
$
183

 
$
(14
)
 
$
146


Income tax expenses/benefits for unrealized gains and losses and the related reclassification adjustments to income for cash flow hedges were an $8 million expense and $49 million benefit in 2012, a $20 million benefit and $41 million expense in 2011 and a $71 million expense and $16 million benefit in 2010, respectively. Income tax expenses/benefits for unrealized gains and losses and the related reclassification adjustments to income for available-for-sale securities were an $87 million expense and $49 million benefit for 2012, a $45 million expense and $59 million benefit in 2011 and a $60 million expense and $35 million benefit in 2010, respectively.
Other
In addition to common stock, our authorized capital includes 5 million shares of preferred stock, $0.0001 par value. As of December 31, 2012 and 2011, no shares of preferred stock were issued or outstanding.