COMMITMENTS AND CONTINGENCIES - Other Liabilities (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Commitments and Contingencies [Line Items]
Interest expense including amortization of debt discount and deferred financing costs	$ 656	$ 422	$ 292
RSN | Fixed Payment Obligations
Commitments and Contingencies [Line Items]
Other current liabilities	31	56
Other long-term liabilities	97	145
Interest expense including amortization of debt discount and deferred financing costs	8	4
RSN | Variable Payment Obligations
Commitments and Contingencies [Line Items]
Other current liabilities	12	34
Other long-term liabilities	41	$ 205
RSN | Variable Payment Obligations | Other Nonoperating Income (Expense)
Commitments and Contingencies [Line Items]
Measurement adjustment gain	$ 159