Segment Information - Assets (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Segment Reporting Information [Line Items]
Total Assets	$ 58,620	$ 52,663
Discontinued Operations	1,560	1,439
Operating Segments | TV Entertainment
Segment Reporting Information [Line Items]
Total Assets	20,719	19,443
Operating Segments | Cable Networks
Segment Reporting Information [Line Items]
Total Assets	24,515	23,139
Operating Segments | Filmed Entertainment
Segment Reporting Information [Line Items]
Total Assets	6,942	6,440
Eliminations/Corporate
Segment Reporting Information [Line Items]
Total Assets	$ 4,884	$ 2,202