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Financing arrangements Financing arrangements (Details 2) (USD $)
In Millions, unless otherwise specified
Dec. 31, 2012
Maturities of Long-term Debt [Abstract]  
2013 $ 2,507 [1]
2014 2,002
2015 0
2016 1,750
2017 2,350
Thereafter 18,017
Total $ 26,626
[1] This amount includes the$2.5 billion principal amount for our 0.375% 2013 Convertible Notes after full accretion of the debt discount.