Earnings Per Share

6 Months Ended

Jun. 30, 2019

Earnings Per Share [Abstract]

Earnings Per Share

Earnings Per Share

Computation of Earnings Per Share 

	Second Quarter				Six Months
	2019		2018		2019		2018
	(in millions, except per share amounts)
Basic Earnings Per Share (EPS):
Net income (loss) attributable to AGL	$	142	$	75	$	196	$	272
Less: Distributed and undistributed income (loss) available to nonvested shareholders	—		—		—		—
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, basic	$	142	$	75	$	196	$	272
Basic shares	101.2		111.7		102.1		113.4
Basic EPS	$	1.40	$	0.67	$	1.92	$	2.39
Diluted EPS:
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, basic	$	142	$	75	$	196	$	272
Plus: Re-allocation of undistributed income (loss) available to nonvested shareholders of AGL and subsidiaries	—		—		—		—
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, diluted	$	142	$	75	$	196	$	272
Basic shares	101.2		111.7		102.1		113.4
Dilutive securities:
Options and restricted stock awards	0.7		1.2		0.9		1.4
Diluted shares	101.9		112.9		103.0		114.8
Diluted EPS	$	1.39	$	0.67	$	1.90	$	2.37
Potentially dilutive securities excluded from computation of EPS because of antidilutive effect	0.1		0.1		—		0.2