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Fair Value Measurements (Assets and Liabilities Required to be Carried at Fair Value on a Recurring Basis) (Details) - Fair Value, Measurements, Recurring - USD ($) $ in Millions | Dec. 31, 2016 | Mar. 31, 2016
--- | --- | ---
Assets: |  |  |
Forward exchange contracts |  | $ 0 | $ 9
Liabilities: |  |  |
Forward exchange contracts |  | (2) | (1)
Total |  | (2) | 132
Level 1 |  |  |
Assets: |  |  |
Forward exchange contracts |  | 0 | 0
Liabilities: |  |  |
Forward exchange contracts |  | 0 | 0
Total |  | 0 | 56
Level 2 |  |  |
Assets: |  |  |
Forward exchange contracts |  | 0 | 9
Liabilities: |  |  |
Forward exchange contracts |  | (2) | (1)
Total |  | (2) | 76
Starz | Starz Series A Common Stock |  |  |
Assets: |  |  |
Available-for-sale securities | [1] | 0 | 56
Starz | Starz Series A Common Stock | Level 1 |  |  |
Assets: |  |  |
Available-for-sale securities | [1] | 0 | 56
Starz | Starz Series A Common Stock | Level 2 |  |  |
Assets: |  |  |
Available-for-sale securities | [1] | 0 | 0
Starz | Starz Series B Common Stock |  |  |
Assets: |  |  |
Available-for-sale securities | [1] | 0 | 68
Starz | Starz Series B Common Stock | Level 1 |  |  |
Assets: |  |  |
Available-for-sale securities | [1] | 0 | 0
Starz | Starz Series B Common Stock | Level 2 |  |  |
Assets: |  |  |
Available-for-sale securities | [1] | $ 0 | $ 68
[1] | At March 31, 2016, the Company classified the Series A common stock of Starz within Level 1 of the fair value hierarchy as the valuation inputs were based on quoted prices in active markets. The Series B common stock of Starz was considered a Level 2 security because the quoted market prices were based on infrequent transactions. Therefore, the fair value of the Series B common stock, which was convertible, at the holder’s option, into Series A common stock of Starz was based on the quoted market price of the Series A common stock, which was an equivalent security other than for the voting rights.

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