For the three months ended March 31, 2020 and 2019, 6 million and 3 million, respectively, of potentially dilutive shares were excluded from the computation of diluted earnings per share due to the Company recognizing a net loss for the period or due to their antidilutive effect.

Basic and diluted earnings (loss) per share follows (in millions, except share data):

	Three Months Ended March 31,
	2020			2019
Numerator:
Net income (loss) attributable to the Company	$	(331	)	$	18
Less: net income attributable to participating securities		—			—
Net income (loss) attributable to the Company's stockholders	$	(331	)	$	18
Denominator:
Weighted average basic common shares outstanding		109,251,892			108,556,369
Effect of dilutive securities		—			504,426
Weighted average diluted common shares outstanding		109,251,892			109,060,795
Earnings (loss) per share attributable to the Company's stockholders:
Basic	$	(3.03	)	$	0.17
Diluted	$	(3.03	)	$	0.16

Under ASC Topic 260, “Earnings Per Share”, the two-class method requires a portion of net income attributable to the Company to be allocated to participating securities, which are unvested awards of share-based payments with non-forfeitable rights to receive dividends or dividend equivalents, if declared. Net losses are not allocated to nonvested shares in periods that the Company determines that those shares are not obligated to participate in losses. For the periods that the Company recognized net income, net income attributable to the Company allocated to these participating securities was excluded from net income attributable to the Company’s stockholders in the numerator of the earnings per share computation. Net income attributable to the Company allocated to these participating securities was less than $1 million for the three months ended March 31, 2019.