Programming and Other Inventory (Narrative) (Details) $ in Millions	3 Months Ended
Mar. 31, 2020 USD ($)
Inventory Disclosure [Abstract]
Amortized program costs	$ 973
Film programming and production costs, amortized	770
Film group, amortized	$ 689

Entertainment, License Agreement For Program Material, Amortization Expense

No definition available.

Name:	viac_EntertainmentLicenseAgreementForProgramMaterialAmortizationExpense
Namespace Prefix:	viac_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration