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Shareholders' Equity
 3 Months Ended
Mar. 31, 2015
Stockholders' Equity Note [Abstract]  
Stockholders' Equity
Shareholders’ Equity
The following tables summarize our shareholders’ equity activity:
Millions of dollars
Total shareholders' equity
Company shareholders' equity
Noncontrolling interest in consolidated subsidiaries
Balance at December 31, 2014
$
16,298

$
16,267

$
31

Stock plans
129

129

—

Payments of dividends to shareholders
(153
)
(153
)
—

Other
(7
)
(6
)
(1
)
Comprehensive income (loss)
(644
)
(646
)
2

Balance at March 31, 2015
$
15,623

$
15,591

$
32

Millions of dollars
Total shareholders' equity
Company shareholders' equity
Noncontrolling interest in consolidated subsidiaries
Balance at December 31, 2013
$
13,615

$
13,581

$
34

Shares repurchased
(500
)
(500
)
—

Stock plans
146

146

—

Payments of dividends to shareholders
(127
)
(127
)
—

Other
(2
)
(1
)
(1
)
Comprehensive income
620

626

(6
)
Balance at March 31, 2014
$
13,752

$
13,725

$
27



Our Board of Directors has authorized a program to repurchase our common stock from time to time. Approximately $5.7 billion remains authorized for repurchases as of March 31, 2015. From the inception of this program in February 2006 through March 31, 2015, we repurchased approximately 201 million shares of our common stock for a total cost of approximately $8.4 billion.
        
Accumulated other comprehensive loss consisted of the following:
Millions of dollars
March 31,
2015
December 31,
2014
Defined benefit and other postretirement liability adjustments
$
(323
)
$
(326
)
Cumulative translation adjustments
(73
)
(70
)
Other
(6
)
(3
)
Total accumulated other comprehensive loss
$
(402
)
$
(399
)