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Goodwill (Goodwill) (Details) $ in Millions | 9 Months Ended
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Dec. 31, 2017 USD ($)
Goodwill [Roll Forward] |  |
Balance as of March 31, 2017 | $ 2,700.5 |
Measurement period adjustments for Starz Merger | 11.3 | [1]
Business acquisitions (see Note 2) | 29.0 | [1]
Balance as of December 31, 2017 | 2,740.8 |
Motion Pictures |  |
Goodwill [Roll Forward] |  |
Balance as of March 31, 2017 | 361.9 |
Measurement period adjustments for Starz Merger | 2.8 | [1]
Business acquisitions (see Note 2) | 29.0 | [1]
Balance as of December 31, 2017 | 393.7 |
Television Production |  |
Goodwill [Roll Forward] |  |
Balance as of March 31, 2017 | 240.4 |
Measurement period adjustments for Starz Merger | 0.0 | [1]
Business acquisitions (see Note 2) | 0.0 | [1]
Balance as of December 31, 2017 | 240.4 |
Media Networks |  |
Goodwill [Roll Forward] |  |
Balance as of March 31, 2017 | 2,098.2 |
Measurement period adjustments for Starz Merger | 8.5 | [1]
Business acquisitions (see Note 2) | 0.0 | [1]
Balance as of December 31, 2017 | 2,106.7 |
Starz |  |
Goodwill [Roll Forward] |  |
Measurement period adjustments for Starz Merger | 11.3 |
Increase to other assets | 10.7 |
Increase to accounts payable and accrued liabilities | 12.2 |
Increase to deferred tax liabilities | (4.9) |
Increase to other liabilities | 14.7 |
Net decrease of fair value of net assets acquired | $ 11.3 |
[1] | Measurement period adjustments for the Starz Merger include (i) an increase to other assets of $10.7 million; (ii) an increase to accounts payable and accrued liabilities of $12.2 million; (iii) a decrease to deferred tax liabilities of $4.9 million; and (iv) an increase to other liabilities assumed of $14.7 million. These adjustments resulted in a net decrease of $11.3 million of the fair value of net assets acquired and an increase of $11.3 million to goodwill.

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