Revenues (Disaggregation of Revenue) (Details) - USD ($) $ in Millions	3 Months Ended
Mar. 31, 2020	Mar. 31, 2019
Disaggregation of Revenue [Line Items]
Revenues	$ 6,669	$ 7,100
Advertising [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,484	3,066
Affiliate [Member]
Disaggregation of Revenue [Line Items]
Revenues	2,197	2,165
Content Licensing [Member]
Disaggregation of Revenue [Line Items]
Revenues	1,594	1,465
Theatrical [Member]
Disaggregation of Revenue [Line Items]
Revenues	167	172
Publishing [Member]
Disaggregation of Revenue [Line Items]
Revenues	170	164
Other [Member]
Disaggregation of Revenue [Line Items]
Revenues	$ 57	$ 68

Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 4
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130543-203045

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 606
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=118956577&loc=SL49130545-203045

Name:	us-gaap_RevenueFromContractWithCustomerExcludingAssessedTax
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration