Other Income (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2013	Jun. 30, 2012	Jun. 30, 2013	Jun. 30, 2012
Other Income [Abstract]
Gains/(Losses) on extinguishment of debt	$ (1)	$ (6)	$ (1)	$ (9)
Gains/(Losses) on derivatives	(64)	(42)	145	(198)
Currency revaluation gains/(losses)	37	(7)	(171)	88
Interest and investment income	5	20	20	50
Insurance Fee Income	14	13	30	29
Other	55	79	100	162
Other income, net	$ 46	$ 57	$ 123	$ 122