Retirement Benefits - Changes in Level 3 Pension Benefit Plan Assets Measured at Fair Value on a Recurring Basis (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	$ 5,729	$ 4,981
Attributable to Assets Held at December 31	434	314
Attributable To Assets Sold	(6)	(32)
Net Purchases/(Settlements)	180	536
Into Level 3	70	23
Out of Level 3	(48)	(93)
Fair Value Ending Balance	6,359	5,729
U.S. Plans | Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	18	22
Attributable to Assets Held at December 31	0	(1)
Attributable To Assets Sold	3	(1)
Net Purchases/(Settlements)	(3)	(1)
Into Level 3	1	0
Out of Level 3	(1)	(1)
Fair Value Ending Balance	18	18
U.S. Plans | U.S. companies
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	15	16
Attributable to Assets Held at December 31	0	(1)
Attributable To Assets Sold	0	0
Net Purchases/(Settlements)	0	0
Into Level 3	0	0
Out of Level 3	0	0
Fair Value Ending Balance	15	15
U.S. Plans | International companies
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	3	6
Attributable to Assets Held at December 31	0	0
Attributable To Assets Sold	3	(1)
Net Purchases/(Settlements)	(3)	(1)
Into Level 3	1	0
Out of Level 3	(1)	(1)
Fair Value Ending Balance	3	3
U.S. Plans | Derivative financial instruments
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	0	0
Attributable to Assets Held at December 31	0	0
Attributable To Assets Sold	0	0
Net Purchases/(Settlements)	0	0
Into Level 3	0	0
Out of Level 3	0	0
Fair Value Ending Balance	0	0
U.S. Plans | Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	298	497
Attributable to Assets Held at December 31	11	22
Attributable To Assets Sold	(4)	(9)
Net Purchases/(Settlements)	(43)	(143)
Into Level 3	69	23
Out of Level 3	(37)	(92)
Fair Value Ending Balance	294	298
U.S. Plans | U.S. government
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	0	0
Attributable to Assets Held at December 31	0	0
Attributable To Assets Sold	0	0
Net Purchases/(Settlements)	0	0
Into Level 3	0	0
Out of Level 3	0	0
Fair Value Ending Balance	0	0
U.S. Plans | U.S. government-sponsored enterprises
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	8	14
Attributable to Assets Held at December 31	0	0
Attributable To Assets Sold	0	0
Net Purchases/(Settlements)	(5)	(5)
Into Level 3	0	0
Out of Level 3	0	(1)
Fair Value Ending Balance	3	8
U.S. Plans | Non-U.S. government
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	169	280
Attributable to Assets Held at December 31	2	(2)
Attributable To Assets Sold	5	(3)
Net Purchases/(Settlements)	(137)	(86)
Into Level 3	5	13
Out of Level 3	(12)	(33)
Fair Value Ending Balance	32	169
U.S. Plans | Investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	33	28
Attributable to Assets Held at December 31	5	4
Attributable To Assets Sold	(4)	2
Net Purchases/(Settlements)	14	18
Into Level 3	42	3
Out of Level 3	(10)	(22)
Fair Value Ending Balance	80	33
U.S. Plans | High yield
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	11	2
Attributable to Assets Held at December 31	1	(1)
Attributable To Assets Sold	1	0
Net Purchases/(Settlements)	4	8
Into Level 3	1	3
Out of Level 3	(4)	(1)
Fair Value Ending Balance	14	11
U.S. Plans | Other credit
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	17	50
Attributable to Assets Held at December 31	5	(1)
Attributable To Assets Sold	0	0
Net Purchases/(Settlements)	28	(32)
Into Level 3	0	0
Out of Level 3	0	0
Fair Value Ending Balance	50	17
U.S. Plans | Mortgage/other asset-backed
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	54	125
Attributable to Assets Held at December 31	1	(3)
Attributable To Assets Sold	3	1
Net Purchases/(Settlements)	43	(38)
Into Level 3	21	4
Out of Level 3	(7)	(35)
Fair Value Ending Balance	115	54
U.S. Plans | Interest rate contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	(3)	(2)
Attributable to Assets Held at December 31	0	0
Attributable To Assets Sold	5	(1)
Net Purchases/(Settlements)	(2)	0
Into Level 3	0	0
Out of Level 3	0	0
Fair Value Ending Balance	0	(3)
U.S. Plans | Credit contracts
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	0	0
Attributable to Assets Held at December 31	0	0
Attributable To Assets Sold	0	0
Net Purchases/(Settlements)	0	0
Into Level 3	0	0
Out of Level 3	0	0
Fair Value Ending Balance	0	0
U.S. Plans | Other contracts
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	9	0
Attributable to Assets Held at December 31	(3)	25
Attributable To Assets Sold	(14)	(8)
Net Purchases/(Settlements)	12	(8)
Into Level 3	0	0
Out of Level 3	(4)	0
Fair Value Ending Balance	0	9
U.S. Plans | Alternatives
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	5,415	4,465
Attributable to Assets Held at December 31	421	293
Attributable To Assets Sold	(5)	(22)
Net Purchases/(Settlements)	159	679
Into Level 3	0	0
Out of Level 3	0	0
Fair Value Ending Balance	5,990	5,415
U.S. Plans | Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	2,968	2,854
Attributable to Assets Held at December 31	189	10
Attributable To Assets Sold	(6)	(22)
Net Purchases/(Settlements)	(30)	126
Into Level 3	0	0
Out of Level 3	0	0
Fair Value Ending Balance	3,121	2,968
U.S. Plans | Private equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	2,085	1,491
Attributable to Assets Held at December 31	201	244
Attributable To Assets Sold	0	0
Net Purchases/(Settlements)	126	350
Into Level 3	0	0
Out of Level 3	0	0
Fair Value Ending Balance	2,412	2,085
U.S. Plans | Real estate
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	362	120
Attributable to Assets Held at December 31	31	39
Attributable To Assets Sold	1	0
Net Purchases/(Settlements)	63	203
Into Level 3	0	0
Out of Level 3	0	0
Fair Value Ending Balance	457	362
U.S. Plans | Other
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	(2)	(3)
Attributable to Assets Held at December 31	2	0
Attributable To Assets Sold	0	0
Net Purchases/(Settlements)	67	1
Into Level 3	0	0
Out of Level 3	(10)	0
Fair Value Ending Balance	57	(2)
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	5,828	5,323
Attributable to Assets Held at December 31	411	(57)
Attributable To Assets Sold	16	12
Net Purchases/(Settlements)	259	570
Into Level 3	21	5
Out of Level 3	(60)	(25)
Fair Value Ending Balance	6,475	5,828
Non-U.S. Plans | Equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	1	10
Attributable to Assets Held at December 31	0	0
Attributable To Assets Sold	0	0
Net Purchases/(Settlements)	0	(5)
Into Level 3	0	1
Out of Level 3	0	(5)
Fair Value Ending Balance	1	1
Non-U.S. Plans | U.S. companies
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	0	0
Attributable to Assets Held at December 31	0	0
Attributable To Assets Sold	0	0
Net Purchases/(Settlements)	0	0
Into Level 3	0	0
Out of Level 3	0	0
Fair Value Ending Balance	0	0
Non-U.S. Plans | International companies
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	1	10
Attributable to Assets Held at December 31	0	0
Attributable To Assets Sold	0	0
Net Purchases/(Settlements)	0	(5)
Into Level 3	0	1
Out of Level 3	0	(5)
Fair Value Ending Balance	1	1
Non-U.S. Plans | Commingled funds
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance		0
Attributable to Assets Held at December 31		0
Attributable To Assets Sold		0
Net Purchases/(Settlements)		0
Into Level 3		0
Out of Level 3		0
Fair Value Ending Balance		0
Non-U.S. Plans | Fixed Income
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	133	180
Attributable to Assets Held at December 31	2	(7)
Attributable To Assets Sold	7	1
Net Purchases/(Settlements)	(6)	(25)
Into Level 3	21	4
Out of Level 3	(60)	(20)
Fair Value Ending Balance	97	133
Non-U.S. Plans | U.S. government
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	0	0
Attributable to Assets Held at December 31	0	0
Attributable To Assets Sold	0	0
Net Purchases/(Settlements)	0	0
Into Level 3	0	0
Out of Level 3	0	0
Fair Value Ending Balance	0	0
Non-U.S. Plans | U.S. government-sponsored enterprises
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	0	0
Attributable to Assets Held at December 31	0	0
Attributable To Assets Sold	0	0
Net Purchases/(Settlements)	0	0
Into Level 3	0	0
Out of Level 3	0	0
Fair Value Ending Balance	0	0
Non-U.S. Plans | Non-U.S. government
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	122	103
Attributable to Assets Held at December 31	1	(6)
Attributable To Assets Sold	9	1
Net Purchases/(Settlements)	(31)	28
Into Level 3	0	0
Out of Level 3	(60)	(4)
Fair Value Ending Balance	41	122
Non-U.S. Plans | Investment grade
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	11	15
Attributable to Assets Held at December 31	1	(1)
Attributable To Assets Sold	1	1
Net Purchases/(Settlements)	4	(7)
Into Level 3	5	3
Out of Level 3	0	0
Fair Value Ending Balance	22	11
Non-U.S. Plans | High yield
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	0	20
Attributable to Assets Held at December 31	0	0
Attributable To Assets Sold	0	0
Net Purchases/(Settlements)	1	(10)
Into Level 3	0	0
Out of Level 3	0	(10)
Fair Value Ending Balance	1	0
Non-U.S. Plans | Other credit
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	0	0
Attributable to Assets Held at December 31	0	0
Attributable To Assets Sold	0	0
Net Purchases/(Settlements)	6	0
Into Level 3	0	0
Out of Level 3	0	0
Fair Value Ending Balance	6	0
Non-U.S. Plans | Mortgage/other asset-backed
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	6	34
Attributable to Assets Held at December 31	0	0
Attributable To Assets Sold	0	1
Net Purchases/(Settlements)	14	(24)
Into Level 3	8	1
Out of Level 3	0	(6)
Fair Value Ending Balance	28	6
Non-U.S. Plans | Commingled funds
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	0	8
Attributable to Assets Held at December 31	0	0
Attributable To Assets Sold	0	0
Net Purchases/(Settlements)	0	(8)
Into Level 3	0	0
Out of Level 3	0	0
Fair Value Ending Balance	0	0
Non-U.S. Plans | Derivative financial instruments
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	(6)	0
Attributable to Assets Held at December 31	0	0
Attributable To Assets Sold	(3)	(2)
Net Purchases/(Settlements)	0	(4)
Into Level 3	8	0
Out of Level 3	0	0
Fair Value Ending Balance	(1)	(6)
Non-U.S. Plans | Alternatives
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	1,336	753
Attributable to Assets Held at December 31	97	(28)
Attributable To Assets Sold	9	11
Net Purchases/(Settlements)	265	600
Into Level 3	0	0
Out of Level 3	0	0
Fair Value Ending Balance	1,707	1,336
Non-U.S. Plans | Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	1,053	711
Attributable to Assets Held at December 31	79	(31)
Attributable To Assets Sold	10	11
Net Purchases/(Settlements)	0	362
Into Level 3	0	0
Out of Level 3	0	0
Fair Value Ending Balance	1,142	1,053
Non-U.S. Plans | Private equity
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	123	31
Attributable to Assets Held at December 31	14	(3)
Attributable To Assets Sold	0	0
Net Purchases/(Settlements)	99	95
Into Level 3	0	0
Out of Level 3	0	0
Fair Value Ending Balance	236	123
Non-U.S. Plans | Real estate
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	160	11
Attributable to Assets Held at December 31	4	6
Attributable To Assets Sold	(1)	0
Net Purchases/(Settlements)	166	143
Into Level 3	0	0
Out of Level 3	0	0
Fair Value Ending Balance	329	160
Non-U.S. Plans | Other
Defined Benefit Plan Disclosure [Line Items]
Fair Value Beginning Balance	4,358	4,380
Attributable to Assets Held at December 31	312	(22)
Attributable To Assets Sold	0	0
Net Purchases/(Settlements)	0	0
Into Level 3	0	0
Out of Level 3	0	0
Fair Value Ending Balance	4,670	4,358
Ford Werke GmbH [Member] | Non-U.S. Plans | Other Pension Benefit Plan Asset Insurance Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value Ending Balance	$ 3,609	$ 3,406