Fair Value Measurements (Tables)

6 Months Ended

Jun. 30, 2015

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  June 30, 2015 using:
Description	June 30, 2015		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	$	1,616.7	$	—	$	1,616.7	$	—
Equity-related derivative instruments	334.7		—		—		334.7
Foreign currency forward contracts	4.9		—		4.9		—
Other	2.5		—		2.5		—
Total derivative instruments	1,958.8		—		1,624.1		334.7
Investments	1,928.8		1,608.7		—		320.1
Total assets	$	3,887.6	$	1,608.7	$	1,624.1	$	654.8
Liabilities - derivative instruments:
Cross-currency and interest rate derivative contracts	$	1,981.9	$	—	$	1,981.9	$	—
Equity-related derivative instruments	265.3		—		—		265.3
Foreign currency forward contracts	9.3		—		9.3		—
Other	0.2		—		0.2		—
Total liabilities	$	2,256.7	$	—	$	1,991.4	$	265.3

			Fair value measurements at  December 31, 2014 using:
Description	December 31, 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	$	1,357.3	$	—	$	1,357.3	$	—
Equity-related derivative instruments	400.2		—		—		400.2
Foreign currency forward contracts	2.5		—		2.5		—
Other	1.4		—		1.4		—
Total derivative instruments	1,761.4		—		1,361.2		400.2
Investments	1,662.7		1,344.3		—		318.4
Total assets	$	3,424.1	$	1,344.3	$	1,361.2	$	718.6
Liabilities - derivative instruments:
Cross-currency and interest rate derivative contracts	$	2,471.3	$	—	$	2,471.3	$	—
Equity-related derivative instruments	88.4		—		—		88.4
Foreign currency forward contracts	0.8		—		0.8		—
Other	0.3		—		0.3		—
Total liabilities	$	2,560.8	$	—	$	2,472.4	$	88.4

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, 2015	$	318.4		$	311.8		$	630.2
Losses included in net loss (a):
Realized and unrealizedlosses on derivative instruments, net	—			(229.7		)	(229.7		)
Realized and unrealizedlosses due to changes in fair values of certain investments, net	(1.5		)	—			(1.5		)
Foreign currency translation adjustments and other, net	3.2			(12.7		)	(9.5		)
Balance of net assets at June 30, 2015	$	320.1		$	69.4		$	389.5

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(a) Most of these net losses relate to assets and liabilities that we continue to carry on our condensed consolidated balance sheet as of June 30, 2015.