Pension Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		9 Months Ended
	Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2014	Sep. 30, 2013
U.S. [Member]
Defined Benefit Plan Net Periodic Benefit Cost Abstract
Service cost	$ 3	$ 4	$ 10	$ 12
Interest cost	12	11	36	33
Expected return on plan assets	(17)	(15)	(49)	(46)
Amortization of prior service cost	2	1	5	4
Amortization of net loss	4	7	10	21
Total pension cost	4	8	12	24
Defined Benefit Pension Contributions Disclosure [Abstract]
Pension employer contributions			56
Pension estimated future employer contributions remainder of fiscal year	0		0
Foreign [Member]
Defined Benefit Plan Net Periodic Benefit Cost Abstract
Service cost	5	6	13	20
Interest cost	126	122	377	394
Expected return on plan assets	(93)	(114)	(279)	(371)
Amortization of prior service cost	0	0	2	0
Amortization of net loss	9	18	26	59
Total pension cost	47	32	139	102
Defined Benefit Pension Contributions Disclosure [Abstract]
Pension employer contributions			110
Pension estimated future employer contributions remainder of fiscal year	$ 28		$ 28