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Shareholders' Equity
 3 Months Ended
Mar. 31, 2018
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, 2017
$
8,349

$
8,322

$
27

Retained earnings adjustment for new accounting standard (a)
30

30

—

Payments of dividends to shareholders
(158
)
(158
)
—

Stock plans
139

139

—

Other
(14
)
(12
)
(2
)
Comprehensive income
45

44

1

Balance at March 31, 2018
$
8,391

$
8,365

$
26


(a) Represents a cumulative-effect adjustment to retained earnings upon our adoption of new accounting standards effective January 1, 2018. See Note 9 for further information on the adoption of the new revenue recognition standard.

Millions of dollars
Total shareholders' equity
Company shareholders' equity
Noncontrolling interest in consolidated subsidiaries
Balance at December 31, 2016
$
9,448

$
9,409

$
39

Retained earnings adjustment for new accounting standard (b)
(384
)
(384
)
—

Payments of dividends to shareholders
(156
)
(156
)
—

Stock plans
120

120

—

Other
(9
)
(8
)
(1
)
Comprehensive loss
(30
)
(30
)
—

Balance at March 31, 2017
$
8,989

$
8,951

$
38


(b) Represents a cumulative-effect adjustment to retained earnings upon our adoption of a new accounting standards update on the income tax consequences of intra-entity transfers of assets other than inventory which was effective January 1, 2017.
    
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, 2018. From the inception of this program in February 2006 through March 31, 2018, we repurchased approximately 201 million shares of our common stock for a total cost of approximately $8.4 billion. There were no repurchases made under the program during the three months ended March 31, 2018.
        
Accumulated other comprehensive loss consisted of the following:
Millions of dollars
March 31,
2018
December 31,
2017
Defined benefit and other postretirement liability adjustments
$
(333
)
$
(334
)
Cumulative translation adjustments
(79
)
(80
)
Other
(59
)
(55
)
Total accumulated other comprehensive loss
$
(471
)
$
(469
)