This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 25
-Paragraph 23
-URI http://asc.fasb.org/extlink&oid=116868678&loc=d3e1043-128460

Restructuring, Impairment, and Other Corporate Matters (Narrative) (Details) $ in Millions	3 Months Ended			9 Months Ended
	Sep. 30, 2020 USD ($) reportingunit	Jun. 30, 2020 USD ($) market	Sep. 30, 2019 USD ($)	Sep. 30, 2020 USD ($)	Sep. 30, 2019 USD ($)
Indefinite-lived Intangible Assets [Line Items]
Restructuring charges	$ 35		$ 28	$ 371	$ 156
Merger-related costs	10		94	51	94
Write down property and equipment				15
Dispositions costs	6			6
Other corporate matters	7		0	21	57
Number of television markets, quantitative impairment test \| market		3
Impairment charges	$ 0		0	25	0
Number of reporting units tested for goodwill impairment \| reportingunit	2
Depreciation of abandoned technology	$ 0		$ 0	12	$ 0
FCC License Impairment Test [Member]
Indefinite-lived Intangible Assets [Line Items]
Number of markets lower than carrying value \| market		2
Intangible assets, written down to fair value		$ 216
Carrying amount		$ 53
Percentage of fair value in excess of carrying amount		7.00%
Average market share period		5 years
TV Entertainment Segment [Member] \| Depreciation and Amortization [Member]
Indefinite-lived Intangible Assets [Line Items]
Impairment charges				$ 25