FAIR VALUE MEASUREMENTS (Tables)

9 Months Ended

Sep. 30, 2012

Summary Of Fair Values, Principal Values And Carrying Values Of Debt Instruments

The following table reflects fair values, principal balances and carrying values of the Company’s debt instruments (see Note 9).

	As of September 30, 2012							As of December 31, 2011
	Fair Value			Principal Balance		Carrying Value		Fair Value		Principal Balance		Carrying Value
	(in millions)
1.875% Convertible Senior Notes due 2013	$	814.9		$	535.0	$	512.3	$	605.2	$	535.0	$	485.0
4.0% Convertible Senior Notes due 2014		1,060.7			500.0		422.1		761.6		500.0		397.6
8.0% Senior Notes due 2016		—			—		—		405.0		375.0		373.2
8.25% Senior Notes due 2019		271.5			243.8		242.2		407.8		375.0		372.4
5.625% Senior Notes due 2019		505.0			500.0		500.0		—		—		—
5.75% Senior Notes due 2020		838.0			800.0		800.0		—		—		—
4.254% 2010-1C Tower Securities		715.4			680.0		680.0		699.0		680.0		680.0
5.101% 2010-2C Tower Securities		611.8			550.0		550.0		579.0		550.0		550.0
2.933% 2012-1C Tower Securities		620.6			610.0		610.0		—		—		—
2011 Term Loan		492.5			493.8		492.7		494.4		497.5		496.3
2012-1 Term Loan		197.0			197.5		197.5		—		—		—
2012-2 Term Loan		302.3			300.0		299.3		—		—		—
Totals:	$	6,429.	7	$	5,410.1	$	5,306.1	$	3,952.0	$	3,512.5	$	3,354.5