v3.4.0.3
Fair Value Disclosure (Narrative) (Details)
$ in Millions
Mar. 31, 2016
USD ($)
NBCUniversal Enterprise [Member]
Fair value of redeemable preferred stock
$ 757
X
- Definition
Fair value of our redeemable subsidiary preferred shares and/or stock
+ References
No definition available.
+ Details
Name:
cmcsa_FairValueAmountOfRedeemablePreferredShares
Namespace Prefix:
cmcsa_
Data Type:
xbrli:monetaryItemType
Balance Type:
credit
Period Type:
instant
X
- Details
Name:
dei_LegalEntityAxis=cmcsa_NbcuniversalEnterpriseMember
Namespace Prefix:
Data Type:
na
Balance Type:
Period Type: