Financing arrangements (Tables)

12 Months Ended

Dec. 31, 2011

Financing arrangements [Abstract]

Carrying values and the fixed contractual coupon rates of long-term borrowings

	2011		2010
0.125% convertible notes due 2011 (0.125% 2011 Convertible Notes)	$	—	$	2,488
0.375% convertible notes due 2013 (0.375% 2013 Convertible Notes)		2,346		2,213
1.875% notes due 2014 (1.875% 2014 Notes)		1,000		—
4.85% notes due 2014 (4.85% 2014 Notes)		1,000		1,000
2.30% notes due 2016 (2.30% 2016 Notes)		748		—
2.50% notes due 2016 (2.50% 2016 Notes)		999		—
5.85% notes due 2017 (5.85% 2017 Notes)		1,099		1,099
6.15% notes due 2018 (6.15% 2018 Notes)		499		499
4.375% euro denominated notes due 2018 (4.375% 2018 euro Notes)		714		—
5.70% notes due 2019 (5.70% 2019 Notes)		998		998
4.50% notes due 2020 (4.50% 2020 Notes)		300		300
3.45% notes due 2020 (3.45% 2020 Notes)		897		897
4.10% notes due 2021 (4.10% 2021 Notes)		998		—
3.875% notes due 2021 (3.875% 2021 Notes)		1,745		—
5.50% pound sterling denominated notes due 2026 (5.50% 2026 pound sterling Notes)		739		—
6.375% notes due 2037 (6.375% 2037 Notes)		899		899
6.90% notes due 2038 (6.90% 2038 Notes)		499		499
6.40% notes due 2039 (6.40% 2039 Notes)		996		996
5.75% notes due 2040 (5.75% 2040 Notes)		697		696
4.95% notes due 2041 (4.95% 2041 Notes)		595		595
5.15% notes due 2041 (5.15% 2041 Notes)		2,232		—
5.65% notes due 2042 (5.65% 2042 Notes)		1,244		—
Other notes, including our zero-coupon convertible notes		184		183
Total debt		21,428		13,362
Less current portion		(84)		(2,488)
Total noncurrent debt	$	21,344	$	10,874

Principal balance, unamortized discount and net carrying amounts of the liability and equity components of our 2013 convertible notes

	Liability component						Equity component
0.375% 2013 Convertible Notes	Principal balance		Unamortized discount		Net carrying amount		Net carrying amount
December 31, 2011	$	2,500	$	154	$	2,346	$	829
December 31, 2010	$	2,500	$	287	$	2,213	$	829

The effective interest rates on notes after giving effect to the related interest rate swap contracts and the notional amounts of interest rate swap contracts

		Notional amount
	Effective interest rate	2011		2010
4.85% 2014 Notes	LIBOR + 0.3%	$	1,000	$	1,000
5.85% 2017 Notes	LIBOR + 2.5%		1,100		1,100
6.15% 2018 Notes	LIBOR + 1.8%		500		500
5.70% 2019 Notes	LIBOR + 2.6%		1,000		1,000
		$	3,600	$	3,600

Aggregate contractual maturities of long-term debt obligations

Maturity date	Amount
2012(1)	$	84
2013(2)		2,500
2014		2,000
2015		—
2016		1,750
Thereafter		15,312
Total	$	21,646

⁽¹⁾  This amount represents the accreted value of our zero-coupon convertible notes due in 2032 which will be redeemed on March 1, 2012.