Defined Benefit Postretirement Plans and Defined Contribution Plan (Details 2) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
United States Pension Plans of US Entity, Defined Benefit [Member]
Components of net periodic benefit cost:
Service cost	$ 33		$ 31		$ 28
Interest cost	40		42		44
Expected return on plan assets	(43)		(43)		(43)
Depreciation, Depletion and Amortization [Abstract]
- prior service cost (credit)	6		7		6
- actuarial loss	43		48		47
Net settlement loss(a)	45	[1]	45	[1]	30	[1]
Net periodic benefit cost(b)	124	[2]	130	[2]	112	[2]
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss (pretax):
Actuarial loss (gain)	(161)		172		97
Amortization of actuarial (loss) gain	(88)		(93)		(77)
Prior service cost	0		0		0
Amortization of prior service credit (cost)	(6)		(7)		(6)
Spin-off downstream business (c)	0	[3]	0	[3]	(24)	[3]
Total recognized in other comprehensive (income) loss	(255)		72		(10)
Total recognized in net periodic benefit cost and other comprehensive (income) loss	(131)		202		102
Foreign Pension Plans, Defined Benefit [Member]
Components of net periodic benefit cost:
Service cost	22		19		19
Interest cost	24		22		22
Expected return on plan assets	(24)		(22)		(23)
Depreciation, Depletion and Amortization [Abstract]
- prior service cost (credit)	1		1		0
- actuarial loss	4		4		2
Net settlement loss(a)	0	[1]	0	[1]	0	[1]
Net periodic benefit cost(b)	27	[2]	24	[2]	20	[2]
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss (pretax):
Actuarial loss (gain)	(11)		15		24
Amortization of actuarial (loss) gain	(4)		(4)		(2)
Prior service cost	0		1		(11)
Amortization of prior service credit (cost)	(1)		(1)		0
Spin-off downstream business (c)	0	[3]	0	[3]	0	[3]
Total recognized in other comprehensive (income) loss	(16)		11		11
Total recognized in net periodic benefit cost and other comprehensive (income) loss	11		35		31
Other Postretirement Benefit Plans, Defined Benefit [Member]
Components of net periodic benefit cost:
Service cost	4		4		4
Interest cost	12		14		16
Expected return on plan assets	0		0		0
Depreciation, Depletion and Amortization [Abstract]
- prior service cost (credit)	(6)		(7)		(7)
- actuarial loss	0		0		0
Net settlement loss(a)	0	[1]	0	[1]	0	[1]
Net periodic benefit cost(b)	10	[2]	11	[2]	13	[2]
Other changes in plan assets and benefit obligations recognized in other comprehensive (income) loss (pretax):
Actuarial loss (gain)	(31)		7		1
Amortization of actuarial (loss) gain	0		0		0
Prior service cost	0		0		0
Amortization of prior service credit (cost)	6		7		7
Spin-off downstream business (c)	0	[3]	0	[3]	0	[3]
Total recognized in other comprehensive (income) loss	(25)		14		8
Total recognized in net periodic benefit cost and other comprehensive (income) loss	(15)		25		21
Subsequent Event [Member] | Other Postretirement Benefit Plans, Defined Benefit [Member]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract]
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)	5
Subsequent Event [Member] | United States and Foreign Pension Plans Defined Benefit [Member]
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Income (Loss) in Next Fiscal Year [Abstract]
Defined Benefit Plan, Amortization of Net Gains (Losses)	24
Defined Benefit Plan, Amortization of Net Prior Service Cost (Credit)	$ (6)

[1] Settlement losses are recorded when lump sum payments from a plan in a period exceed the plan’s total service and interest costs for the period. Such settlements occurred in one or more of our U.S. plans in 2013, 2012 and 2011.

[2] Net periodic benefit cost reflects a calculated market-related value of plan assets which recognizes changes in fair value over three years.

[3] Includes net inter-company transfers of (gains)/losses due to the spin-off of the downstream business.