Changes in Accumulated Other Comprehensive Loss (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013		Dec. 31, 2012	Dec. 31, 2011
Accumulated Other Comprehensive Income (Loss) [Abstract]
AOCI, Post-employment Benefits, net of tax	$ (464)		$ (639)
AOCI, Hedge instruments, net of tax	(26)		(34)
AOCI, Translation adjustments and other, net of tax	(315)		(309)
Accumulated other comprehensive loss	(805)		(982)
Other Comprehensive (Income) Loss, Pension and Other Postretirement Benefit Plans, Adjustment, before Reclassification Adjustments, Net of Tax	202
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Net of Tax	(7)
Other comprehensive income, translation adjustments and other, before reclassificaitons, net of tax	(8)
Other comprehensive income, before reclassifications to income	187
Other Comprehensive (Income) Loss, Reclassification Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net (Gain) Loss, Net of Tax	(27)	[1]
Amount of Loss Reclassified from AOCI into Income (Effective Portion)	15	[1]
Reclassificaion of translation adjustments and other in AOCI into earnings, net of tax	2	[1]
Other comprehensive income, portion representing reclassificaitons to earnings	(10)	[1]
Post-employment benefits	175		(224)	(132)
Hedge instruments	8		46	1
Translation adjustments and other	(6)		51	(127)
Other comprehensive loss	$ 177		$ (127)	$ (258)

[1] Refer to Note 13, "Pension, Other Post-employment Benefits and Employee Benefit Plans," and Note 8, "Financial Instruments," for additional information with respect to reclassifications from accumulated other comprehensive loss to earnings relating to post-employment benefits, net of tax and hedge instruments, net of tax, respectively. Such items do not represent reclassifications in their entirety.