Per Share Data

6 Months Ended

Jun. 30, 2020

11. Per Share Data

Basic earnings per share are based upon the weighted average number of shares of common stock outstanding during the periods. Diluted earnings per share includes the effect of certain stock option awards and other equity-based compensation awards. We have unvested restricted stock units that are considered participating securities for earnings per share.

Earnings per share data and dividends declared per share of common stock are as follows:


	Three Months Ended June 30,
	2020						2019
Millions of dollars	Continuing Operations		Discontinued Operations		Continuing Operations		Discontinued Operations
Net income (loss)	$	315	$	(1)	$	1,006	$	(3)


Dividends on redeemable non-controlling interest stock	(1)		—		(1)		—
Net (income) loss attributable to participating securities	(1)		—		(2)		—
Net income (loss) attributable to ordinary shareholders – basic and diluted	$	313	$	(1)	$	1,003	$	(3)

Millions of shares, except per share amounts
Basic weighted average common stock outstanding	334		334		370		370

Effect of dilutive securities	—		—		—		—
Potential dilutive shares	334		334		370		370

Earnings (loss) per share:
Basic	$	0.94	$	—	$	2.71	$	(0.01)
Diluted	$	0.94	$	—	$	2.71	$	(0.01)


	Six Months Ended June 30,
	2020						2019
Millions of dollars	Continuing Operations		Discontinued Operations		Continuing Operations		Discontinued Operations
Net income (loss)	$	458	$	—	$	1,823	$	(3)


Dividends on redeemable non-controlling interest stock	(3)		—		(3)		—
Net (income) loss attributable to participating securities	(1)		—		(3)		—
Net income (loss) attributable to ordinary shareholders – basic and diluted	$	454	$	—	$	1,817	$	(3)

Millions of shares, except per share amounts
Basic weighted average common stock outstanding	334		334		371		371
Effect of dilutive securities	—		—		—		—

Potential dilutive shares	334		334		371		371

Earnings (loss) per share:
Basic	$	1.36	$	—	$	4.90	$	(0.01)
Diluted	$	1.36	$	—	$	4.89	$	(0.01)