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Investment In Films and Television Programs and Program Rights (Schedule of Investment In Films And Television Programs) (Details) - USD ($) $ in Millions	Dec. 31, 2016	Mar. 31, 2016
Investment in Films and Television Programs and Program Rights [Line Items]
Total investment in films and television programs and program rights, net	$ 2,052	$ 1,458
Less current portion of program rights	(236)	0
Non-current portion	1,816	1,458
Motion Pictures | Theatrical And Non-Theatrical Films
Investment in Films and Television Programs and Program Rights [Line Items]
Released, net of accumulated amortization	576	584
Acquired libraries, net of accumulated amortization	3	4
Completed and not released	35	34
In progress	279	422
In development	38	28
Total investment in film and television programs	931	1,072
Television Production | Direct-to-Television Programs
Investment in Films and Television Programs and Program Rights [Line Items]
Released, net of accumulated amortization	210	189
In progress	119	191
In development	7	6
Total investment in film and television programs	336	386
Media Networks
Investment in Films and Television Programs and Program Rights [Line Items]
Total investment in films and television programs and program rights, net	785	0
Media Networks | Licensed Program Rights
Investment in Films and Television Programs and Program Rights [Line Items]
Licensed program rights, net of accumulated amortization	503	0
Media Networks | Produced Programming
Investment in Films and Television Programs and Program Rights [Line Items]
Released, net of accumulated amortization	107	0
In progress	168	0
In development	$ 7	$ 0

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Investment in films and television programs represents the carrying amount of unamortized costs of completed films and television programs which have been produced or acquired, libraries acquired as part of acquisitions of companies, and films and television programs in progress and in development. Capitalized costs include production costs, production overhead, interest, development costs and acquired production costs. The carrying amount is stated at the lower of cost, less accumulated amortization, or fair value at the balance sheet date. Program rights include unamortized costs relating to rights to exhibit feature films, movies, television series and other acquired programming on networks. For a classified balance sheet, represents the noncurrent portion only of investment in films and television programs and program rights.

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The carrying amount of unamortized costs of completed films and television programs which have been produced by the Company or for which the Company has acquired distribution rights, libraries acquired as part of acquisitions of companies, films and television programs in progress and in development and home entertainment product inventory. Capitalized costs include production costs, production overhead, interest, development costs and acquired production costs. The carrying amount is stated at the lower of cost, less accumulated amortization, or fair value at the balance sheet date.

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