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Stockholders' Equity
 12 Months Ended
Dec. 31, 2011
Stockholders' Equity Note [Abstract]  
Stockholders' Equity
STOCKHOLDERS' EQUITY
The company's Board of Directors authorized a $2,000 share buyback plan in June 2001. During 2011, the company purchased and retired 13.8 million shares at a total cost of $672 under this plan. During 2010, the company purchased and retired 5.4 million shares at a total cost of $250. During 2009, there were no purchases of stock under this plan. As of December 31, 2011, the company has purchased 39.7 million shares at a total cost of $1,884. In April 2011, the company's Board of Directors authorized a $2,000 share buyback plan. This plan will not commence until the plan authorized in June 2001 is completed. There is no expiration date on the current authorizations.

Common stock held in treasury is recorded at cost. When retired, the excess of the cost of treasury stock over its par value is allocated between reinvested earnings and additional paid-in capital.

Set forth below is a reconciliation of common stock share activity for the years ended December 31, 2011, 2010 and 2009:
Shares of common stock
Issued
Held In Treasury
Balance January 1, 2009
989,415,000

(87,041,000
)
Issued
1,440,000

—

Balance December 31, 2009
990,855,000

(87,041,000
)
Issued
18,891,000

—

Repurchased
—

(5,395,000
)
Retired
(5,395,000
)
5,395,000

Balance December 31, 2010
1,004,351,000

(87,041,000
)
Issued
22,650,000

—

Repurchased
—

(13,837,000
)
Retired
(13,837,000
)
13,837,000

Balance December 31, 2011
1,013,164,000

(87,041,000
)


The pre-tax, tax and after-tax effects of the components of other comprehensive income (loss) are shown below:
 
Pre-tax
Tax
After-tax
2011
 
 
 
Cumulative translation adjustment
$
(457
)
$
—

$
(457
)
Net revaluation and clearance of cash flow hedges to earnings
113

(41
)
72

Pension benefits (Note 17)
(3,431
)
1,187

(2,244
)
Other benefits (Note 17)
(509
)
177

(332
)
Net unrealized gains on securities
2

(1
)
1

Other comprehensive loss attributable to noncontrolling interest
(18
)
—

(18
)
Other comprehensive loss attributable to DuPont
$
(4,300
)
$
1,322

$
(2,978
)
2010
 
 
 
Cumulative translation adjustment
$
(6
)
$
—

$
(6
)
Net revaluation and clearance of cash flow hedges to earnings
54

(20
)
34

Pension benefits (Note 17)
(111
)
46

(65
)
Other benefits (Note 17)
47

(30
)
17

Net unrealized gains on securities
2

(1
)
1

Other comprehensive income attributable to noncontrolling interest
2

—

2

Other comprehensive loss attributable to DuPont
$
(12
)
$
(5
)
$
(17
)
2009
 
 
 
Cumulative translation adjustment
$
89

$
—

$
89

Net revaluation and clearance of cash flow hedges to earnings
145

(52
)
93

Pension benefits (Note 17)
(485
)
152

(333
)
Other benefits (Note 17)
(162
)
56

(106
)
Net unrealized gains on securities
6

(2
)
4

Other comprehensive loss attributable to noncontrolling interest
(2
)
—

(2
)
Other comprehensive loss attributable to DuPont
$
(409
)
$
154

$
(255
)


Tax benefit recorded in Stockholders' Equity was $1,365, $12 and $144 for the years 2011, 2010 and 2009, respectively. Included in these amounts were tax benefits (expense) of $43, $17 and $(10) for the years 2011, 2010 and 2009, respectively, associated with stock compensation programs. The remainder consists of amounts recorded within other comprehensive income (loss) as shown in the table above.

Balances of related after-tax components comprising accumulated other comprehensive loss are summarized below:
December 31,
2011
2010
2009
Cumulative translation adjustment
$
(244
)
$
213

$
219

Net revaluation and clearance of cash flow hedges to earnings
41

(31
)
(65
)
Net unrealized gains on securities
3

2

1

Pension benefits

 
 
Net losses
(8,204
)
(5,950
)
(5,873
)
Net prior service cost
(72
)
(82
)
(94
)
Other benefits
 
 
 
Net losses
(824
)
(577
)
(551
)
Net prior service benefit
550

635

592

 
$
(8,750
)
$
(5,790
)
$
(5,771
)