Significant Transactions (Allocation of Purchase Price) (Details) $ in Millions, £ in Billions			12 Months Ended
	Oct. 09, 2018 USD ($)	Oct. 09, 2018 GBP (£)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Business Acquisition [Line Items]
Goodwill			$ 279	$ 29,925
Sky Limited [Member]
Business Acquisition [Line Items]
Consideration transferred	$ 39,387	£ 30.2
Cash	1,283
Accounts receivable and other current assets	2,359
Film and television costs (See Note 4)	2,512
Property and equipment (See Note 11)	4,127
Intangible assets (See Note 12)	19,539
Accounts payable, accrued liabilities and other current liabilities	(5,885)
Long-term debt (See Note 7)	(11,468)
Deferred tax assets (liabilities), net (See Note 5)	(2,974)
Other noncurrent assets and (liabilities), net	(1,398)
Fair value of identifiable net assets acquired	8,095
Goodwill	$ 31,292