Income Per Common Share (Tables)

9 Months Ended

Sep. 30, 2020

Earnings Per Share [Abstract]

Schedule of reconciliations of the numerators and denominators used in the computations of basic and diluted earnings per common share

Reconciliations of the numerators and denominators used in the computations of basic and diluted income per common share were as follows, in millions: 

	Three Months Ended September 30,				Nine Months Ended September 30,
	2020		2019		2020		2019
Numerator (basic and diluted):
Income from continuing operations	$	275	$	163	$	618	$	481
Less: Allocation to unvested restricted stock awards	1		1		5		3
Income from continuing operations attributable to common shareholders	274		162		613		478
(Loss) income from discontinued operations, net	—		(37)		411		1
Less: Allocation to unvested restricted stock awards	—		—		3		—
(Loss) income from discontinued operations, net attributable to common shareholders	—		(37)		408		1
Net income attributable to common shareholders	$	274	$	125	$	1,021	$	479
Denominator:
Basic common shares (based upon weighted average)	261		286		265		289
Add: Stock option dilution	—		1		1		1
Diluted common shares	261		287		266		290