Earnings Per Share

9 Months Ended

Sep. 30, 2019

Earnings Per Share [Abstract]

Earnings Per Share

Earnings Per Share

Computation of Earnings Per Share 

	Third Quarter				Nine Months
	2019		2018		2019		2018
	(in millions, except per share amounts)
Basic Earnings Per Share (EPS):
Net income (loss) attributable to AGL	$	69	$	161	$	265	$	433
Less: Distributed and undistributed income (loss) available to nonvested shareholders	—		1		—		1
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, basic	$	69	$	160	$	265	$	432
Basic shares	98.2		108.0		100.8		111.6
Basic EPS	$	0.71	$	1.48	$	2.63	$	3.87
Diluted EPS:
Distributed and undistributed income (loss) available to common shareholders of AGL and subsidiaries, basic	$	69	$	160	$	265	$	432
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	$	69	$	160	$	265	$	432
Basic shares	98.2		108.0		100.8		111.6
Dilutive securities:
Options and restricted stock awards	0.7		1.3		0.8		1.3
Diluted shares	98.9		109.3		101.6		112.9
Diluted EPS	$	0.70	$	1.47	$	2.61	$	3.83
Potentially dilutive securities excluded from computation of EPS because of antidilutive effect	—		—		—		0.1