Shareholders' Equity (Tables)

3 Months Ended

Mar. 31, 2021

Stockholders' Equity Note [Abstract]

Summary of shareholders' equity activity

The following tables summarize our shareholders’ equity activity for the three months ended March 31, 2021 and March 31, 2020, respectively:

Millions of dollars	Common Stock		Paid-in Capital in Excess of Par Value		Treasury Stock		Retained Earnings		Accumulated Other Comprehensive Income (Loss)		Noncontrolling Interest in Consolidated Subsidiaries		Total
Balance at December 31, 2020	$	2,666	$	—	$	(6,021)	$	8,691	$	(362)	$	9	$	4,983
Comprehensive income (loss):
Net income	—		—		—		170		—		1		171
Cash dividends ($0.045 per share)	—		—		—		(40)		—		—		(40)
Stock plans (a)	—		34		144		(112)		—		—		66
Other	—		—		—		—		—		(1)		(1)
Balance at March 31, 2021	$	2,666	$	34	$	(5,877)	$	8,709	$	(362)	$	9	$	5,179

(a) In January 2021, we issued common stock from treasury shares for the employee stock purchase plan and for restricted stock grants. As a result, additional paid in capital in January 2021 was reduced below zero, which resulted in a reduction of retained earnings by $112 million. Additional issuances from treasury shares will similarly impact additional paid in capital and retained earnings.

Millions of dollars	Common Stock		Paid-in Capital in Excess of Par Value		Treasury Stock		Retained Earnings		Accumulated Other Comprehensive Income (Loss)		Noncontrolling Interest in Consolidated Subsidiaries		Total
Balance at December 31, 2019	$	2,669	$	143	$	(6,427)	$	11,989	$	(362)	$	13	$	8,025
Comprehensive income (loss):
Net income (loss)	—		—		—		(1,017)		—		2		(1,015)
Other comprehensive income	—		—		—		—		11		—		11
Cash dividends ($0.18 per share)	—		—		—		(158)		—		—		(158)
Stock repurchase program	—		—		(100)		—		—		—		(100)
Stock plans	—		(33)		115		—		—		—		82
Other	—		—		—		—		—		(2)		(2)
Balance at March 31, 2020	$	2,669	$	110	$	(6,412)	$	10,814	$	(351)	$	13	$	6,843

Schedule of comprehensive income (loss)

Accumulated other comprehensive loss consisted of the following:

Millions of dollars	March 31, 2021		December 31, 2020
Defined benefit and other postretirement liability adjustments	$	(225)	$	(226)
Cumulative translation adjustments	(85)		(83)
Other	(52)		(53)
Total accumulated other comprehensive loss	$	(362)	$	(362)