Balance Sheet Effect of Derivative Financial Instruments (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012
Balance Sheet Effect of Derivative Instruments [Abstract]
Fair Value of Assets	$ 1,200
Automotive [Member]
Balance Sheet Effect of Derivative Instruments [Abstract]
Notional	30,843	28,742
Fair Value of Assets	580	241
Fair Value of Liabilities	418	610
Automotive [Member] | Not Designated as Hedging Instrument [Member]
Balance Sheet Effect of Derivative Instruments [Abstract]
Notional	14,605	11,079
Fair Value of Assets	167	91
Fair Value of Liabilities	229	253
Automotive [Member] | Foreign currency exchange contracts [Member] | Not Designated as Hedging Instrument [Member]
Balance Sheet Effect of Derivative Instruments [Abstract]
Notional	11,599	9,225
Fair Value of Assets	144	68
Fair Value of Liabilities	210	129
Automotive [Member] | Commodity Contract [Member] | Not Designated as Hedging Instrument [Member]
Balance Sheet Effect of Derivative Instruments [Abstract]
Notional	3,006	1,854
Fair Value of Assets	23	23
Fair Value of Liabilities	19	124
Automotive [Member] | Cash Flow Hedging [Member] | Foreign currency exchange contracts [Member] | Designated as Hedging Instrument [Member]
Balance Sheet Effect of Derivative Instruments [Abstract]
Notional	16,238	17,663
Fair Value of Assets	413	150
Fair Value of Liabilities	189	357
Financial Services [Member]
Balance Sheet Effect of Derivative Instruments [Abstract]
Notional	93,671	91,057
Fair Value of Assets	585	1,300
Fair Value of Liabilities	506	381
Financial Services [Member] | Not Designated as Hedging Instrument [Member]
Balance Sheet Effect of Derivative Instruments [Abstract]
Notional	74,893	74,303
Fair Value of Assets	225	513
Fair Value of Liabilities	327	373
Financial Services [Member] | Foreign currency exchange contracts [Member] | Not Designated as Hedging Instrument [Member]
Balance Sheet Effect of Derivative Instruments [Abstract]
Notional	2,410	2,378
Fair Value of Assets	1	9
Fair Value of Liabilities	25	8
Financial Services [Member] | Interest rate contracts [Member] | Not Designated as Hedging Instrument [Member]
Balance Sheet Effect of Derivative Instruments [Abstract]
Notional	69,863	68,919
Fair Value of Assets	224	504
Fair Value of Liabilities	126	248
Financial Services [Member] | Cross-currency interest rate swap contracts [Member] | Not Designated as Hedging Instrument [Member]
Balance Sheet Effect of Derivative Instruments [Abstract]
Notional	2,620	3,006
Fair Value of Assets	0	0
Fair Value of Liabilities	176	117
Financial Services [Member] | Fair Value Hedging [Member] | Interest rate contracts [Member] | Designated as Hedging Instrument [Member]
Balance Sheet Effect of Derivative Instruments [Abstract]
Notional	18,778	16,754
Fair Value of Assets	360	787
Fair Value of Liabilities	$ 179	$ 8