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Business Segments (Goodwill and Intangible Assets by Geographic Area) (Details) - USD ($) $ in Thousands | Mar. 31, 2018 | Mar. 31, 2017
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Schedule of Goodwill and Intangible Assets by Geographic Areas [Line Items] |  |
Intangible assets, net (including goodwill) | $ 3,401,014 | $ 3,518,865
United States |  |
Schedule of Goodwill and Intangible Assets by Geographic Areas [Line Items] |  |
Intangible assets, net (including goodwill) | 3,278,021 | 3,396,285
Rest of world |  |
Schedule of Goodwill and Intangible Assets by Geographic Areas [Line Items] |  |
Intangible assets, net (including goodwill) | $ 122,993 | $ 122,580

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- Definition Schedule of Goodwill and Intangible Assets by Geographic Areas [Line Items] + References No definition available. + Details
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- Definition Carrying amount of finite-lived intangible assets, indefinite-lived intangible assets and goodwill. Goodwill is an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized. Intangible assets are assets, not including financial assets, lacking physical substance. + References No definition available. + Details
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- Details
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- Details
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