Fair Value Measurements (Tables)

9 Months Ended

Sep. 30, 2014

Fair Value Disclosures [Abstract]

Summary of Assets and Liabilities Measured at Fair Value

A summary of our assets and liabilities that are measured at fair value on a recurring basis is as follows:

			Fair value measurements at  September 30, 2014 using:
Description	September 30, 2014		Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
	in millions
Assets:
Derivative instruments:
Cross-currency and interest rate derivative contracts	$	1,067.8	$	—	$	1,067.8	$	—
Equity-related derivative instruments	453.3		—		—		453.3
Foreign currency forward contracts	5.8		—		5.8		—
Other	1.3		—		1.3		—
Total derivative instruments	1,528.2		—		1,074.9		453.3
Investments	4,364.3		4,049.6		—		314.7
Total assets	$	5,892.5	$	4,049.6	$	1,074.9	$	768.0
Liabilities - derivative instruments:
Cross-currency and interest rate derivative contracts	$	2,591.9	$	—	$	2,591.9	$	—
Equity-related derivative instruments	220.9		—		—		220.9
Foreign currency forward contracts	0.9		—		0.9		—
Other	0.4		—		0.4		—
Total liabilities	$	2,814.1	$	—	$	2,593.2	$	220.9

			Fair value measurements at  December 31, 2013 using:
Description	December 31, 2013		Quoted prices in active markets for identical assets (Level 1)		Significant other observable inputs (Level 2)		Significant unobservable inputs (Level 3)
	in millions
Assets:
Derivative instruments:
Cross-currency and interest rate derivative contracts	$	769.2	$	—	$	769.2	$	—
Equity-related derivative instruments	430.4		—		—		430.4
Foreign currency forward contracts	2.6		—		2.6		—
Other	2.0		—		2.0		—
Total derivative instruments	1,204.2		—		773.8		430.4
Investments	3,481.8		3,182.4		—		299.4
Total assets	$	4,686.0	$	3,182.4	$	773.8	$	729.8
Liabilities - derivative instruments:
Cross-currency and interest rate derivative contracts	$	2,918.6	$	—	$	2,918.6	$	—
Equity-related derivative instruments	116.9		—		—		116.9
Foreign currency forward contracts	20.2		—		20.2		—
Other	0.8		—		0.8		—
Total liabilities	$	3,056.5	$	—	$	2,939.6	$	116.9

Schedule of Reconciliation of the Beginning and Ending Balances of Assets and Liabilities Measured at Fair Value Using Significant Unobservable, or Level 3, Inputs

A reconciliation of the beginning and ending balances of our assets and liabilities measured at fair value on a recurring basis using significant unobservable, or Level 3, inputs is as follows:

	Investments			Equity-related derivative instruments			Total
	in millions
Balance of net assets at January 1, 2014	$	299.4		$	313.5		$	612.9
Partial settlement of the Ziggo Collar (a)	—			17.9			17.9
Gains (losses)included in net loss (b):
Realized and unrealized losses on derivative instruments, net	—			(124.3		)	(124.3		)
Realized and unrealized gains due to changes in fair values of certain investments, net	29.5			—			29.5
Foreign currency translation adjustments and other, net	(14.2		)	25.3			11.1
Balance of net assets at September 30, 2014	$	314.7		$	232.4		$	547.1

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(a) For additional information regarding the Ziggo Collar, see note 4.

(b) Most of these net gains (losses) relate to assets and liabilities that we continue to carry on our condensed consolidated balance sheet as of September 30, 2014.