Earnings Per Share

6 Months Ended

Jun. 30, 2020

Earnings Per Share [Abstract]

Earnings Per Share

Earnings Per Share

Computation of Earnings Per Share 

	Second Quarter				Six Months
	2020		2019		2020		2019
	(in millions, except per share amounts)
Basic Earnings Per Share (EPS):
Net income (loss) attributable to AGL	$	183	$	142	$	128	$	196
Less: Distributed and undistributed income (loss) available to nonvested shareholders	—		—		—		—
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, basic	$	183	$	142	$	128	$	196
Basic shares	86.5		101.2		89.5		102.1
Basic EPS	$	2.11	$	1.40	$	1.43	$	1.92
Diluted EPS:
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, basic	$	183	$	142	$	128	$	196
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	$	183	$	142	$	128	$	196
Basic shares	86.5		101.2		89.5		102.1
Dilutive securities:
Options and restricted stock awards	0.5		0.7		0.7		0.9
Diluted shares	87.0		101.9		90.2		103.0
Diluted EPS	$	2.10	$	1.39	$	1.42	$	1.90
Potentially dilutive securities excluded from computation of EPS because of antidilutive effect	0.6		0.1		1.2		—