Debt And Commitments - Debt Outstanding (Details) (USD $)	3 Months Ended
	Jun. 30, 2013	Dec. 31, 2012
Debt Outstanding [Abstract]
Total Debt	$ 107,857,000,000	$ 105,058,000,000
Automotive [Member]
Debt Outstanding [Abstract]
Short-term Debt	1,175,000,000	1,386,000,000
Debt payable after one year	14,642,000,000	12,870,000,000
Total Debt	15,817,000,000	14,256,000,000
Fair value of debt	17,075,000,000	14,867,000,000
Debt Instruments [Abstract]
Short-term debt carried at cost which approximates fair value	414,000,000	484,000,000
Automotive [Member] | Other debt [Member]
Debt Outstanding [Abstract]
Debt payable within one year	105,000,000	311,000,000
Unamortized (discount)/premium	4,000,000	(7,000,000)
Debt payable after one year	1,248,000,000	1,048,000,000
Automotive [Member] | Public Unsecured Debt Securities [Member]
Debt Outstanding [Abstract]
Debt Instrument, Face Amount	6,830,000,000	5,420,000,000
Unamortized (discount)/premium	(150,000,000)	(100,000,000)
Debt Instruments [Abstract]
Debt Instrument, Increase (Decrease) for Period, Net	1,400,000,000
Automotive [Member] | Convertible Notes [Member]
Debt Outstanding [Abstract]
Debt Instrument, Face Amount	908,000,000	908,000,000
Unamortized (discount)/premium	(127,000,000)	(142,000,000)
Automotive [Member] | DOE ATVM Incentive Program
Debt Outstanding [Abstract]
Debt payable within one year	591,000,000	591,000,000
Debt payable after one year	4,719,000,000	5,014,000,000
Automotive [Member] | EIB Credit Facilities [Member]
Debt Outstanding [Abstract]
Debt payable after one year	1,210,000,000	729,000,000
Automotive [Member] | Non-Affiliates [Member]
Debt Outstanding [Abstract]
Short-term Debt	479,000,000	484,000,000
Financial Services [Member]
Debt Outstanding [Abstract]
Short-term Debt	13,734,000,000	17,745,000,000
Unamortized (discount)/premium	(113,000,000)	(134,000,000)
Fair value adjustments	210,000,000	791,000,000
Long Term Debt And Capital Lease Obligations Current And Non Current	78,306,000,000	73,057,000,000
Total Debt	92,040,000,000	90,802,000,000
Fair value of debt	94,868,000,000	94,578,000,000
Debt Instruments [Abstract]
Short-term debt carried at cost which approximates fair value	8,200,000,000	8,400,000,000
Financial Services [Member] | Other debt [Member]
Debt Outstanding [Abstract]
Short-term Debt	1,470,000,000	1,655,000,000
Financial Services [Member] | Asset backed commercial paper [Member]
Debt Outstanding [Abstract]
Short-term Debt	4,813,000,000	5,752,000,000
Financial Services [Member] | Other asset backed short term debt [Member]
Debt Outstanding [Abstract]
Short-term Debt	733,000,000	3,762,000,000
Financial Services [Member] | Floating rate demand notes [Member]
Debt Outstanding [Abstract]
Short-term Debt	5,183,000,000	4,890,000,000
Financial Services [Member] | Commercial Paper [Member]
Debt Outstanding [Abstract]
Short-term Debt	1,535,000,000	1,686,000,000
Financial Services [Member] | Unsecured Debt [Member]
Debt Outstanding [Abstract]
Debt payable within one year	6,411,000,000	5,830,000,000
Debt payable after one year	34,621,000,000	32,503,000,000
Financial Services [Member] | Asset-backed debt [Member]
Debt Outstanding [Abstract]
Debt payable within one year	16,558,000,000	13,801,000,000
Debt payable after one year	20,619,000,000	20,266,000,000
Notes due January 15, 2043 [Member] | Automotive [Member] | Public Unsecured Debt Securities [Member]
Debt Instruments [Abstract]
Debt Instrument, Increase, Additional Borrowings	2,000,000,000
Debt Instrument, Interest Rate, Stated Percentage	4.75%
Notes due June 10, 2043 [Member] | Automotive [Member] | Public Unsecured Debt Securities [Member]
Debt Instruments [Abstract]
Debt Instrument, Interest Rate, Stated Percentage	7.50%
Debt Instrument, Decrease, Repayments	$ 600,000,000