Cash, Cash Equivalents, and Marketable Securities Available for Sale Securities (Details) - Operating Segments - Company excluding Ford Credit - USD ($) $ in Millions	3 Months Ended	6 Months Ended
Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Dec. 31, 2020
Debt Securities, Available-for-sale [Abstract]
Debt Securities, Available-for-sale, Amortized Cost	$ 15,307		$ 15,307		$ 16,102
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	110		110		195
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(17)		(17)		(1)
Debt Securities, Available-for-sale	15,400		15,400		16,296
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value	4,754		4,754		7,318
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value	9,437		9,437		8,666
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Fair Value	1,209		1,209		312
Sales proceeds	659	$ 2,452	3,539	$ 4,317
Gross realized gains	4	21	17	28
Gross realized losses	0	$ 3	2	$ 10
U.S. government
Debt Securities, Available-for-sale [Abstract]
Debt Securities, Available-for-sale, Amortized Cost	2,797		2,797		2,894
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	21		21		44
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(1)		(1)		0
Debt Securities, Available-for-sale	2,817		2,817		2,938
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value	815		815		1,649
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value	2,002		2,002		1,286
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Fair Value	0		0		3
U.S. government agencies
Debt Securities, Available-for-sale [Abstract]
Debt Securities, Available-for-sale, Amortized Cost	2,157		2,157		2,588
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	10		10		15
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(6)		(6)		0
Debt Securities, Available-for-sale	2,161		2,161		2,603
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value	230		230		772
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value	1,204		1,204		1,629
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Fair Value	727		727		202
Non-U.S. government and agencies
Debt Securities, Available-for-sale [Abstract]
Debt Securities, Available-for-sale, Amortized Cost	3,613		3,613		2,926
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	17		17		31
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(6)		(6)		0
Debt Securities, Available-for-sale	3,624		3,624		2,957
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value	1,099		1,099		1,330
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value	2,161		2,161		1,617
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Fair Value	364		364		10
Corporate debt
Debt Securities, Available-for-sale [Abstract]
Debt Securities, Available-for-sale, Amortized Cost	6,504		6,504		7,482
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	60		60		102
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(3)		(3)		(1)
Debt Securities, Available-for-sale	6,561		6,561		7,583
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value	2,546		2,546		3,566
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value	3,899		3,899		3,987
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Fair Value	116		116		30
Other marketable securities
Debt Securities, Available-for-sale [Abstract]
Debt Securities, Available-for-sale, Amortized Cost	236		236		212
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Gain, before Tax	2		2		3
Debt Securities, Available-for-sale, Accumulated Gross Unrealized Loss, before Tax	(1)		(1)		0
Debt Securities, Available-for-sale	237		237		215
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling within One Year, Fair Value	64		64		1
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after One Through Five Years, Fair Value	171		171		147
Debt Securities, Available-for-sale, Maturity, Allocated and Single Maturity Date, Rolling after Five Through Ten Years, Fair Value	$ 2		$ 2		$ 67

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Fair value of investment in debt security, measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in rolling sixth through tenth fiscal year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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Fair value of investment in debt security, measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in next rolling fiscal year through fifth year following latest fiscal year. For interim and annual periods when interim period is reported on rolling approach, from latest statement of financial position date.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of realized gain on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of realized loss on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of cash inflow from sale of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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