Fair Value of Financial Instruments - Liabilities, Recurring (Details) (USD $) In Millions	Sep. 30, 2011	Dec. 31, 2010
Fair Value Disclosures [Abstract]
Carrying value of long-term debt, including current portion	$ 7,685	$ 6,448
Recurring basis \| Quoted Prices in Active Markets for Identical Assets (Level 1)
Liabilities Recorded at Fair Value in the Financial Statements:
Interest Rate Swap Liabilities (included in other non-current liabilities)	0	0
Total Derivative Liabilities Recorded at Fair Value in the Financial Statements	0	0
Long-term Debt, including the current portion:
Senior Notes	4,405	2,789
Convertible Notes	556	697
Term Loans	1,595	1,632
Commercial Mortgage	0	0
Capital Leases and Other	0	0
Total Long-term Debt, including the current portion:	6,556	5,118
Recurring basis \| Significant Other Observable Inputs (Level 2)
Liabilities Recorded at Fair Value in the Financial Statements:
Interest Rate Swap Liabilities (included in other non-current liabilities)	98	108
Total Derivative Liabilities Recorded at Fair Value in the Financial Statements	98	108
Long-term Debt, including the current portion:
Senior Notes	0	0
Convertible Notes	1,031	1,189
Term Loans	0	0
Commercial Mortgage	77	79
Capital Leases and Other	28	29
Total Long-term Debt, including the current portion:	1,136	1,297
Total Carrying Value in Consolidated Balance Sheet
Liabilities Recorded at Fair Value in the Financial Statements:
Interest Rate Swap Liabilities (included in other non-current liabilities)	98	108
Total Derivative Liabilities Recorded at Fair Value in the Financial Statements	98	108
Long-term Debt, including the current portion:
Senior Notes	4,716	2,885
Convertible Notes	1,197	1,788
Term Loans	1,679	1,679
Commercial Mortgage	65	67
Capital Leases and Other	28	29
Total Long-term Debt, including the current portion:	$ 7,685	$ 6,448

Represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. Fair value of sum total of minimum lease payments, during the lease term net of payments or other amounts applied to the principal and aggregate of other miscellaneous borrowings owed by the reporting entity at the balance sheet date.

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Commercial Mortgage, Fair Value Disclosure

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This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. Fair value of convertible debt at the balance sheet date.

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-Publisher FASB

-Name Accounting Standards Codification

-Glossary Convertible Security

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Sum of the carrying values as of the balance sheet date of all debt, including all short-term borrowings, long-term debt, and capital lease obligations.

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Fair value of derivative liability, presented on a gross basis even when the derivative instrument is subject to master netting arrangements and qualifies for net presentation in the statement of financial position.

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Fair value as of the balance sheet date of all interest rate derivative liabilities designated as cash flow hedging instruments.

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This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents notes payable as of the balance sheet date.

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