Fair Value Measurements (Tables)

3 Months Ended

Mar. 31, 2012

The estimated fair values of our financial instruments as of March 31, 2012 and December 31, 2011 have been calculated based upon available market information or an appropriate valuation technique, and are presented below by level in the fair value hierarchy:



	March 31, 2012				December 31, 2011
	Carrying Amount		Fair Value		Carrying Amount		Fair Value
Level 1:
Subordinated convertible debentures	$	55	$	60	$	55	$	49
Senior and senior subordinated notes	4,558		4,790		1,732		1,795
Level 2:
4 percent Convertible Senior Notes	131		145		129		138
Level 3:
Capital leases (1)	38		31		39		33

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(1)	The fair value of capital leases is determined using the expected present value of the leases.

- Definition

Tabular disclosure of the fair value of financial instruments (as defined), including financial assets and financial liabilities (collectively, as defined), and the measurements of those instruments, assets, and liabilities. Such certain disclosures about the financial instruments, assets, and liabilities include: (1) the fair value of the required items together with their carrying amounts (as appropriate) and (2) the methodology and assumptions used in developing such estimates of fair value.

+ References

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Reference 4: http://www.xbrl.org/2003/role/presentationRef

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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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+ Details