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Derivative Instruments and Hedging Activities (Forward Contracts Effect on Statement of Operations and Comprehensive Income) (Details) - USD ($) $ in Millions		3 Months Ended
		Jun. 30, 2019	Jun. 30, 2018
Derivative Instruments, Gain (Loss) [Line Items]
Total direct operating expense on consolidated statements of operations		$ 568.0	$ 530.0
Total interest expense on consolidated statements of operations	[1]	49.0	35.4
Direct operating | Not Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in direct operating expense		0.0	(0.7)
Forward exchange contracts | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in accumulated other comprehensive income (loss)		0.0	0.0
Gain reclassified from accumulated other comprehensive income (loss) into direct operating expense		1.1	0.0
Interest rate swap agreements | Designated as Hedging Instrument
Derivative Instruments, Gain (Loss) [Line Items]
Gain (loss) recognized in accumulated other comprehensive income (loss)		(45.9)	(6.8)
Loss reclassified from accumulated other comprehensive income (loss) into interest expense		$ (1.8)	$ (0.9)
[1] Represents interest expense before interest on dissenting shareholders' liability.

X

- Definition

The amount of expense recognized that includes amortization of film and television production or acquisition costs, participation and residual expenses, provision for doubtful accounts, and foreign exchange gains and losses. Participation costs represent contingent consideration payable based on the performance of the film to parties associated with the film, including producers, writers, directors or actors, etc. Residuals represent amounts payable to various unions or guilds.

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Amount of the cost of borrowed funds accounted for as interest expense, excluding interest on the dissenters' liability.

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The amount of net gains or losses on foreign currency cash flow hedges reclassified during the period to earnings from accumulated other comprehensive income upon the hedged transaction affecting earnings.

+ References

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-Publisher FASB
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-Section 50
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The net gain (loss) recognized in earnings during the reporting period representing the amount of the cash flow hedges' ineffectiveness.

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The amount of net gains or losses on interest rate cash flow hedges reclassified during the period to earnings from accumulated other comprehensive income upon the hedged transaction affecting earnings.

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Amount after tax and reclassification adjustments, of increase (decrease) in accumulated gain (loss) from derivative instruments designated and qualifying as the effective portion of cash flow hedges and an entity's share of an equity investee's increase (decrease) in deferred hedging gain (loss), attributable to parent entity.

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