Earnings (Loss) Per Share (Tables)

12 Months Ended

Dec. 31, 2020

Earnings Per Share [Abstract]

Reconciliation of basic and diluted earnings (loss) per share

The following is a reconciliation of basic and diluted earnings (loss) per share from continuing operations for the years ended December 31, 2020, 2019 and 2018:

In millions, except per share amounts	2020		2019		2018
Numerator for earnings (loss) per share calculation:
Income (loss) from continuing operations	$	7,201	$	6,631	$	(596)
Income allocated to participating securities	—		(5)		(3)
Net (income) loss attributable to noncontrolling interests	(13)		3		2
Income (loss) from continuing operations attributable to CVS Health	$	7,188	$	6,629	$	(597)
Denominator for earnings (loss) per share calculation:
Weighted average shares, basic	1,309		1,301		1,044
Effect of dilutive securities	5		4		—
Weighted average shares, diluted	1,314		1,305		1,044
Earnings (loss) per share from continuing operations:
Basic	$	5.49	$	5.10	$	(0.57)
Diluted	$	5.47	$	5.08	$	(0.57)