Consolidated Statement of Income - USD ($) $ in Millions	12 Months Ended
Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Statement [Abstract]
Revenue	$ 123,731	$ 121,572	$ 121,427
Costs and Expenses:
Programming and production	37,026	36,762	38,213
Marketing and promotion	8,073	7,971	8,506
Other operating and administrative	40,533	39,190	38,263
Depreciation	8,729	8,854	8,724
Amortization	6,072	5,482	5,097
Goodwill and long-lived asset impairments	0	0	8,583
Total costs and expenses	100,434	98,258	107,385
Operating income	23,297	23,314	14,041
Interest expense	(4,134)	(4,087)	(3,896)
Investment and other income (loss), net	(490)	1,252	(861)
Income before income taxes	18,673	20,478	9,284
Income tax expense	(2,796)	(5,371)	(4,359)
Net income	15,877	15,107	4,925
Less: Net income (loss) attributable to noncontrolling interests	(315)	(282)	(445)
Net income attributable to Comcast Corporation	$ 16,192	$ 15,388	$ 5,370
Basic earnings per common share attributable to Comcast Corporation shareholders (in dollars per share)	$ 4.17	$ 3.73	$ 1.22
Diluted earnings per common share attributable to Comcast Corporation shareholders (in dollars per share)	$ 4.14	$ 3.71	$ 1.21

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.