Accounting Policies and Supplemental Disclosures - Acquisition Activity (Details) - USD ($) $ in Millions		3 Months Ended		9 Months Ended		12 Months Ended
	Mar. 17, 2022	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021	Dec. 31, 2021
Business Acquisition [Line Items]
Cash consideration		$ 885	$ 654	$ 7,485	$ 1,604	$ 7,866	$ 1,985
Goodwill		$ 20,168		$ 20,168		$ 20,168		$ 15,371
MGM Holdings Inc.
Business Acquisition [Line Items]
Cash consideration	$ 6,100
Debt assumed	2,500
Video content acquired	3,400
Goodwill	$ 4,900