Earnings Per Share

6 Months Ended

Jun. 30, 2018

EARNINGS PER SHARE

Basic and diluted earnings per common share were calculated as follows:



	Three Months Ended June 30				Six Months Ended June 30
(in millions, except per share amounts)	2018		2017		2018		2017
Net earnings (loss)	$	239	$	147	$	395	$	266

Weighted-average common shares outstanding	44.2		45.7		44.5		46.0
Net dilutive effect of stock options and awards	0.1		0.1		0.1		0.1
Dilutive weighted-average common shares outstanding	44.3		45.8		44.6		46.1

Earnings (loss) per share - basic	$	5.41	$	3.22	$	8.88	$	5.78
Earnings (loss) per share - diluted	$	5.40	$	3.21	$	8.86	$	5.77

Under the treasury stock method, the Company has excluded from the diluted share amounts presented above the effects of 0.3 million Restricted Performance Stock Rights ("RPSRs") for the three and six months ended June 30, 2018. The Company has excluded from diluted share amounts presented above the effects of 0.3 million and 0.4 million RPSRs for the three and six months ended June 30, 2017, respectively.