The current period expense charged against earnings on long-lived, physical assets not used in production, and which are not intended for resale, to allocate or recognize the cost of such assets over their useful lives; or to record the reduction in book value of an intangible asset over the benefit period of such asset; or to reflect consumption during the period of an asset that is not used in production.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 360
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=123570139&loc=d3e3602-108585

Name:	us-gaap_DepreciationAndAmortization
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Segment Information - Reconciliation of Depreciation and Amortization from Segments to Consolidated (Detail) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		9 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2021	Dec. 31, 2020	Mar. 31, 2021	Mar. 31, 2020
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 93	$ 70	$ 172	$ 138	$ 172	$ 138
Operating Segments \| Cable Network Programming
Segment Reporting Information [Line Items]
Depreciation and amortization	17	12	27	25	27	25
Operating Segments \| Television
Segment Reporting Information [Line Items]
Depreciation and amortization	28	26	54	51	54	51
Operating Segments \| Other, Corporate and Eliminations
Segment Reporting Information [Line Items]
Depreciation and amortization	$ 48	$ 32	$ 91	$ 62	$ 91	$ 62