Earnings Per Share (Tables)

3 Months Ended

Mar. 31, 2013

Computation of Diluted EPS
		Three Months Ended March 31
			2013					2012
(in millions, except per share data)			Net Income Attributable to Comcast Corporation	Shares		Per Share Amount		Net Income Attributable to Comcast Corporation	Shares		Per Share Amount
Basic EPS attributable to Comcast Corporation shareholders		$	1,437	2,634	$	0.55	$	1,224	2,708	$	0.45
Effect of dilutive securities:
Assumed exercise or issuance of shares relating to stock
	plans			41					36
Diluted EPS attributable to Comcast Corporation
	shareholders	$	1,437	2,675	$	0.54	$	1,224	2,744	$	0.45

Tabular disclosure of the effect of income (loss) on an entity's diluted earnings per share.