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Derivative Instruments (Realized and Unrealized Gains (Losses) on Derivatives) (Schedule and Footnotes) (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Derivative [Line Items]
Gain (loss) on derivative instruments, net	$ (82.8)	$ (211.3)
Cross-currency and interest rate derivative contracts
Derivative [Line Items]
Gain (loss) on derivative instruments, net	(87.3)	(361.9)
Equity-related derivative instruments:
Derivative [Line Items]
Gain (loss) on derivative instruments, net	14.8	145.2
ITV Collar
Derivative [Line Items]
Gain (loss) on derivative instruments, net	13.8	123.6
Lionsgate Forward
Derivative [Line Items]
Gain (loss) on derivative instruments, net	0.8	9.0
Sumitomo Collar
Derivative [Line Items]
Gain (loss) on derivative instruments, net	0.0	11.4
Other
Derivative [Line Items]
Gain (loss) on derivative instruments, net	0.2	1.2
Foreign currency forward and option contracts
Derivative [Line Items]
Gain (loss) on derivative instruments, net	(10.6)	5.6
Other
Derivative [Line Items]
Gain (loss) on derivative instruments, net	$ 0.3	$ (0.2)

X

- Definition

Amount of increase (decrease) in the fair value of derivatives recognized in the income statement.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
-Section 50
-Paragraph 4A
-Subparagraph (b)(1)
-URI http://asc.fasb.org/extlink&oid=109980867&loc=SL5618551-113959

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+ References

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