Basic earnings per share are calculated using the weighted-average number of shares of common stock outstanding during the period. Diluted earnings per share calculations include any dilutive effect of potential common shares. In periods with a net loss from continuing operations, diluted earnings per share are calculated using weighted-average basic shares for that period, as utilizing diluted shares would be anti-dilutive to loss per share.

A reconciliation of the amounts used to calculate basic and diluted earnings per share for the years ended December 31, 2018 and 2017 follows (in millions):

	Year Ended December 31,
	2018			2017
(Loss) earnings from continuing operations attributable to Eastman Kodak Company	$	(9	)	$	93
Less: Series A convertible preferred stock cash and accrued dividends		(11	)		(11	)
Less: Series A convertible preferred stock deemed dividends		(9	)		(8	)
(Loss) earnings from continuing operations available to common shareholders - basic and diluted	$	(29	)	$	74

Net (loss) income attributable to Eastman Kodak Company	$	(16	)	$	94
Less: Series A convertible preferred stock cash and accrued dividends		(11	)		(11	)
Less: Series A convertible preferred stock deemed dividends		(9	)		(8	)
Net (loss) income available to common shareholders - basic and diluted	$	(36	)	$	75

Weighted-average common shares outstanding - basic	42.7	42.5
Effect of dilutive securities:
Unvested restricted stock units	—	0.2
Weighted-average common shares outstanding - diluted	42.7	42.7

As a result of the net loss from continuing operations available to common shareholders for the year ended December 31, 2018, Kodak calculated diluted earnings per share using weighted-average basic shares outstanding. If Kodak reported earnings from continuing operations available to common shareholders for the year ended December 31, 2018, the calculation of diluted earnings per share would have included the assumed conversion of 0.3 million unvested restricted stock units.

The computation of diluted earnings per share for the years ended December 31, 2018 and 2017 excluded the impact of (1) the assumed conversion of 2.0 million shares of Series A convertible preferred shares, and (2) the assumed conversion of 5.2 million and 4.8 million outstanding employee stock options, respectively, because they would have been anti-dilutive. In addition, the computation of diluted earnings per share for the year ended December 31, 2017 excluded the impact of (1) the assumed conversion of net share settled warrants to purchase 1.8 million shares of common stock at an exercise price of $14.93 and (2) the assumed conversion of net share settled warrants to purchase 1.8 million shares of common stock at an exercise price of $16.12 because they would have been anti-dilutive. The warrants terminated at the close of business on September 3, 2018.