Pension, Other Postretirement Benefits and Savings Plans (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended				3 Months Ended	12 Months Ended																	12 Months Ended						3 Months Ended		12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2013 Hourly United States Pension Plans of US Entity, Defined Benefit	Sep. 30, 2012 Annuity Purhcase to settle U.K. pension plan obligations	Dec. 31, 2013 U.S. Other Postretirement Benefit Plans	Dec. 31, 2012 U.S. Other Postretirement Benefit Plans	Dec. 31, 2011 U.S. Other Postretirement Benefit Plans	Dec. 31, 2013 Non-U.S. Other Postretirement Benefit Plans	Dec. 31, 2012 Non-U.S. Other Postretirement Benefit Plans	Dec. 31, 2011 Non-U.S. Other Postretirement Benefit Plans	Dec. 31, 2013 U.S.	Dec. 31, 2012 U.S.	Dec. 31, 2011 U.S.	Dec. 31, 2013 Non-U.S.	Dec. 31, 2012 Non-U.S.	Dec. 31, 2011 Non-U.S.	Dec. 31, 2013 Other Postretirement Benefit Plans	Dec. 31, 2012 Other Postretirement Benefit Plans	Dec. 31, 2011 Other Postretirement Benefit Plans	Aug. 31, 2012 U.S. Other Postretirement Benefit Plans, Change in Benefit Obligation Other Postretirement Benefit Plans	Aug. 31, 2012 Canadian Other Postretirement Benefit Plans, Change in Benefit Obligation Other Postretirement Benefit Plans	Dec. 31, 2013 Prior Service Cost U.S.	Dec. 31, 2013 Prior Service Cost Non-U.S.	Dec. 31, 2013 Prior Service Cost Other Postretirement Benefit Plans	Dec. 31, 2013 Net Actuarial Loss U.S.	Dec. 31, 2013 Net Actuarial Loss Non-U.S.	Dec. 31, 2013 Net Actuarial Loss Other Postretirement Benefit Plans	Mar. 31, 2013 Discretionary Contributions Frozen U.S. Pension Plans of US Entity	Mar. 31, 2013 Required Contributions Frozen U.S. Pension Plans of US Entity	Dec. 31, 2013 Subsequent Event Hourly United States Pension Plans of US Entity, Defined Benefit	Dec. 31, 2013 Subsequent Event Discretionary Contributions Hourly United States Pension Plans of US Entity, Defined Benefit	Dec. 31, 2013 2014 Pension Contributions
Defined Benefit Plan Disclosure [Line Items]
Pension Contributions																													$ 834	$ 34	$ 1,150	$ 900	$ 1,300
Defined Benefit Plan Recognized Net Gain Loss Due To Settlements Curtailments And Termination Benefits	0	1	15		9																											32
Defined Benefit Plan, Net Periodic Benefit Cost [Abstract]
Service cost												45	39	41	39	31	32	6	6	6
Interest cost												243	261	283	131	143	150	19	24	30
Expected return on plan assets												(335)	(299)	(306)	(111)	(117)	(131)	(1)	(1)	0
Amortization of prior service cost (credit)												17	23	23	1	2	2	(45)	(40)	(37)
Amortization of net losses												205	179	134	50	45	38	12	11	10
Net periodic cost												175	203	175	110	104	91	(9)	0	9
Curtailments/settlements												0	1	15	4	11	1	0	0	0
Termination benefits												0	0	0	0	1	1	0	0	0
Total benefits cost						(24)	(17)	(12)	15	17	21	175	204	190	114	116	93	(9)	0	9
Prior service cost (credit) from plan amendments												(30)	0	0	(1)	6	0	0	(82)	0
Increase (decrease) in net actuarial losses												(374)	665	735	(128)	372	45	(51)	(4)	15
Amortization of prior service (cost) credit in net periodic cost												(17)	(23)	(23)	(1)	(2)	(2)	47	40	37
Amortization of net losses in net periodc cost												(205)	(179)	(134)	(53)	(43)	(38)	(13)	(11)	(10)
Immediate recognition of prior service cost and unrecognized gains and losses due to curtailments, settlements and divestitures												0	(1)	(15)	(3)	(11)	(4)	0	0	0
Total recognized in other comprehensive (income) loss before tax and minority												(626)	462	563	(186)	322	1	(17)	(57)	42
Total recognized in total benefits cost and other comprehensive (income) loss before tax and minority												(451)	666	753	(72)	438	94	(26)	(57)	51
Pension Savings and Other Postretirement Benefit Plans (Textuals) [Abstract]
Settlements													15
Pension and Other Postretirement Benefit Plans, Amounts that Will be Amortized from Accumulated Other Comprehensive Loss in Next Fiscal Year																							1	1	(45)	115	40	9
Contributions to defined contribution savings plans	106	97	98
Current assets	8,644	8,498										0	0		0	2		0	0
Noncurrent assets												51	0		59	33		0	0
Current liabilities	(5,025)	(5,322)										(12)	(8)		(25)	(23)		(33)	(39)
Noncurrent liabilities												(1,220)	(2,648)		(708)	(878)		(350)	(429)
Net amounts recognized												(1,181)	(2,656)		(674)	(866)		(383)	(468)
Defined Benefit Plan, Benefit Obligation				$ 4,000																	$ 56	$ 18