Financing Arrangements Textuals Abstract.

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Percentage of principal amount of notes that may be paid upon occurrence of change in control triggering event.

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Warrants that expired in the period.

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The carrying amount of the equity component of convertible debt which may be settled in cash upon conversion.

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-Name Accounting Standards Codification
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The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount.

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Interest rate stated in the contractual debt agreement.

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-Publisher SEC
-Name Regulation S-X (SX)
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-Section 02
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-Article 5

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The cash outflow paid to third parties in connection with debt origination, which will be amortized over the remaining maturity period of the associated long-term debt.

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-Publisher FASB
-Name Emerging Issues Task Force (EITF)
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The cash outflow for debt initially having maturity due after one year or beyond the normal operating cycle, if longer.

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Financing arrangements (Details Textuals) (USD $) In Millions, unless otherwise specified	6 Months Ended				6 Months Ended																								6 Months Ended
	Jun. 30, 2011	Jun. 30, 2010	Jun. 30, 2011 5.85% notes due 2017 (2017 Notes) [Member]	Dec. 31, 2010 5.85% notes due 2017 (2017 Notes) [Member]	Jun. 30, 2011 0.125% convertible notes due 2011 (2011 Convertible notes) [Member]	Dec. 31, 2010 0.125% convertible notes due 2011 (2011 Convertible notes) [Member]	Jun. 30, 2011 0.375% convertible notes due 2013 (2013 Convertible notes) [Member]	Dec. 31, 2010 0.375% convertible notes due 2013 (2013 Convertible notes) [Member]	Jun. 30, 2011 4.85% notes due 2014 (2014 Notes) [Member]	Dec. 31, 2010 4.85% notes due 2014 (2014 Notes) [Member]	Jun. 30, 2011 5.70% notes due 2019 (2019 Notes) [Member]	Dec. 31, 2010 5.70% notes due 2019 (2019 Notes) [Member]	Jun. 30, 2011 6.15% notes due 2018 (2018 Notes) [Member]	Dec. 31, 2010 6.15% notes due 2018 (2018 Notes) [Member]	Jun. 30, 2011 6.375% notes due 2037 (2037 Notes) [Member]	Dec. 31, 2010 6.375% notes due 2037 (2037 Notes) [Member]	Jun. 30, 2011 4.50% notes due March 2020 (March 2020 Notes) [Member]	Dec. 31, 2010 4.50% notes due March 2020 (March 2020 Notes) [Member]	Jun. 30, 2011 6.90% notes due 2038 (2038 Notes) [Member]	Dec. 31, 2010 6.90% notes due 2038 (2038 Notes) [Member]	Jun. 30, 2011 5.75% notes due 2040 (2040 Notes) [Member]	Dec. 31, 2010 5.75% notes due 2040 (2040 Notes) [Member]	Jun. 30, 2011 6.40% notes due 2039 (2039 Notes) [Member]	Dec. 31, 2010 6.40% notes due 2039 (2039 Notes) [Member]	Jun. 30, 2011 3.45% notes due October 2020 (October 2020 Notes) [Member]	Dec. 31, 2010 3.45% notes due October 2020 (October 2020 Notes) [Member]	Jun. 30, 2011 4.95% notes due 2041 (2041 Notes) [Member]	Dec. 31, 2010 4.95% notes due 2041 (2041 Notes) [Member]	Jun. 30, 2011 2.30% notes due 2016 (2016 Notes) [Member]	Jun. 30, 2011 4.10% notes due 2021 (2021 Notes) [Member]	Jun. 30, 2011 5.65% notes due 2042 (2042 Notes) [Member]	Jun. 30, 2011 Warrants issued concurrent with issuance of 2011 convertible debt [Member]
Financing arrangements (Textuals) [Abstract]
Stated contractual interest rate on note			5.85%	5.85%		0.125%	0.375%	0.375%	4.85%	4.85%	5.70%	5.70%	6.15%	6.15%	6.375%	6.375%	4.50%	4.50%	6.90%	6.90%	5.75%	5.75%	6.40%	6.40%	3.45%	3.45%	4.95%	4.95%	2.30%	4.10%	5.65%
Repayment of debt	$ 2,500	$ 0			$ 2,500
Principal Amount of Notes Issued																													750	1,000	1,250
Original debt discount					643
Percentage of principal amount of notes that may be paid upon the occurrence of a change in control triggering event																													101.00%	101.00%	101.00%
Debt issuance cost	$ 17
Warrants to acquire shares of our common stock, expired																																31.3