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Segment Information (Segment Revenues By Media) (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2016 | Dec. 31, 2015
Revenue from External Customer [Line Items] |  |  |  |
Revenues | $ 752 | $ 671 | $ 1,945 | $ 1,556
Reportable Segments | Motion Pictures |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenues | 440 | 506 | 1,266 | 1,135
Reportable Segments | Motion Pictures | Theatrical |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenues | 87 | 183 | 197 | 232
Reportable Segments | Motion Pictures | Home Entertainment |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenues | 167 | 126 | 467 | 389
Reportable Segments | Motion Pictures | Television |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenues | 91 | 49 | 214 | 157
Reportable Segments | Motion Pictures | International |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenues | 90 | 140 | 372 | 333
Reportable Segments | Motion Pictures | Other |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenues | 5 | 8 | 16 | 24
Reportable Segments | Television Production |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenues | 229 | 165 | 595 | 421
Reportable Segments | Television Production | Home Entertainment |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenues | 23 | 16 | 33 | 36
Reportable Segments | Television Production | International |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenues | 31 | 26 | 75 | 112
Reportable Segments | Television Production | Other |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenues | 1 | 2 | 6 | 5
Reportable Segments | Television Production | Domestic Television |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenues | 174 | 121 | 481 | 268
Reportable Segments | Media Networks |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenues | 85 | 0 | 86 | 0
Reportable Segments | Media Networks | Starz Networks |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenues | 83 | 0 | 83 | 0
Reportable Segments | Media Networks | Content And Other |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenues | 1 | 0 | 1 | 0
Reportable Segments | Media Networks | Streaming Services |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenues | 1 | 0 | 2 | 0
Intersegment Eliminations |  |  |  |
Revenue from External Customer [Line Items] |  |  |  |
Revenues | $ (2) | $ 0 | $ (2) | $ 0

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