Income Per Common Share (Tables)

3 Months Ended

Mar. 31, 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 March 31,
	2020		2019
Numerator (basic and diluted):
Income from continuing operations	$	133	$	107
Less: Allocation to unvested restricted stock awards	1		1
Income from continuing operations attributable to common shareholders	132		106
Income from discontinued operations, net	397		9
Less: Allocation to unvested restricted stock awards	3		—
Income from discontinued operations, net attributable to common shareholders	394		9
Net income attributable to common shareholders	$	526	$	115
Denominator:
Basic common shares (based upon weighted average)	273		293
Add: Stock option dilution	1		1
Diluted common shares	274		294