(Loss) Income Per Common Share (Tables)

6 Months Ended

Jun. 30, 2021

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 (loss) income per common share were as follows, in millions: 

	Three Months Ended June 30,				Six Months Ended June 30,
	2021		2020		2021		2020
Numerator (basic and diluted):
(Loss) income from continuing operations	$	(36)	$	210	$	58	$	343
Less: Allocation to redeemable noncontrolling interest	—		—		6		—
Less: Allocation to unvested restricted stock awards	—		2		—		3
(Loss) income from continuing operations attributable to common shareholders	(36)		208		52		340
Income from discontinued operations, net	—		14		—		411
Less: Allocation to unvested restricted stock awards	—		—		—		3
Income from discontinued operations, net attributable to common shareholders	—		14		—		408
Net (loss) income attributable to common shareholders	$	(36)	$	222	$	52	$	748
Denominator:
Basic common shares (based upon weighted average)	252		262		254		267
Add: Stock option dilution	—		1		2		1
Diluted common shares	252		263		256		268