Pension Plans (Details) (USD $) In Millions, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
U.S. [Member]
Defined Benefit Plan Net Periodic Benefit Cost Abstract
Service cost	$ 4	$ 4	$ 7	$ 8
Interest cost	12	11	24	22
Expected return on plan assets	(16)	(16)	(32)	(31)
Amortization of prior service cost	1	2	3	3
Amortization of net loss	3	7	6	14
Total pension cost	4	8	8	16
Defined Benefit Pension Contributions Disclosure [Abstract]
Pension employer contributions			55
Pension estimated future employer contributions remainder of fiscal year	1		1
Foreign [Member]
Defined Benefit Plan Net Periodic Benefit Cost Abstract
Service cost	4	6	8	13
Interest cost	129	134	251	273
Expected return on plan assets	(96)	(127)	(186)	(257)
Amortization of prior service cost	1	0	2	0
Amortization of net loss	9	22	17	42
Total pension cost	47	35	92	71
Defined Benefit Pension Contributions Disclosure [Abstract]
Pension employer contributions			80
Pension estimated future employer contributions remainder of fiscal year	$ 58		$ 58