Condensed Consolidated Statements of Income (Unaudited) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Income Statement [Abstract]
Revenue	$ 29,688	$ 30,513	$ 59,746	$ 60,205
Costs and Expenses:
Programming and production	7,961	8,849	16,784	17,853
Marketing and promotion	1,922	2,100	3,940	4,063
Other operating and administrative	9,630	9,317	19,487	18,618
Depreciation	2,153	2,195	4,328	4,459
Amortization	1,387	1,343	2,762	2,856
Total costs and expenses	23,053	23,804	47,301	47,849
Operating income	6,635	6,709	12,445	12,355
Interest expense	(1,026)	(998)	(2,028)	(2,007)
Investment and other income (loss), net	(434)	15	(137)	622
Income before income taxes	5,175	5,726	10,280	10,970
Income tax expense	(1,336)	(1,537)	(2,663)	(3,013)
Net income	3,839	4,189	7,616	7,957
Less: Net income (loss) attributable to noncontrolling interests	(89)	(59)	(169)	(126)
Net income attributable to Comcast Corporation	$ 3,929	$ 4,248	$ 7,785	$ 8,082
Basic earnings (loss) per common share attributable to Comcast Corporation shareholders (in dollars per share)	$ 1.01	$ 1.02	$ 1.98	$ 1.93
Diluted earnings (loss) per common share attributable to Comcast Corporation shareholders (in dollars per share)	$ 1.00	$ 1.02	$ 1.97	$ 1.92

Other operating and administrative expense recognized in the period not presented separately.

No definition available.

Name:	cmcsa_OtherOperatingAndAdministrative
Namespace Prefix:	cmcsa_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The amount of expense recognized in the period for costs associated with video programming and content acquisition and production costs. Programming expenses include the fees paid to license the programming distributed to video customers, such as the programming license fees charged by cable networks and fees charged for retransmission of the signals from local broadcast television stations. Production costs include the amortization of owned and acquired programming, sports rights, direct production costs, residual and participation payments, production overhead, costs associated with the distribution of programming to third-party networks and other distribution platforms, and on-air talent costs. It also includes the amortization of capitalized theatrical film production and acquisition costs and distribution expenses.

+ References

No definition available.