Retirement Benefits - Changes in Level 3 Pension Benefit Plan Assets Measured at Fair Value on a Recurring Basis (Details) - Pension Plan - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 44,253	$ 39,774	$ 44,160
Fair Value at January 1	1	5
Attributable to Assets Held at December 31	1	0
Attributable to Assets Sold	0	5
Net Purchases/ (Settlements)	15	4
Transfers Into/ (Out of) Level 3	0	(3)
Fair Value at December 31	17	1
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	29,958	27,273	$ 29,657
Fair Value at January 1	5,249	5,633
Attributable to Assets Held at December 31	215	(384)
Attributable to Assets Sold	5	(1)
Net Purchases/ (Settlements)	113	(1)
Transfers Into/ (Out of) Level 3	0	0
Fair Value at December 31	5,572	5,249
Non-U.S. Plans | Ford Werke GmbH | Other Pension Benefit Plan Asset Insurance Contracts [Member]
Defined Benefit Plan Disclosure [Line Items]
Fair Value at January 1	4,300
Fair Value at December 31	4,500	4,300
Fair Value, Inputs, Level 1 | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	9,737	9,335
Fair Value, Inputs, Level 1 | U.S. Plans | Cash Cash equivalents and repurchase agreements
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	(1,900)	(1,700)
Fair Value, Inputs, Level 1 | Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	(223)	1,142
Fair Value, Inputs, Level 1 | Non-U.S. Plans | Cash Cash equivalents and repurchase agreements
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	(2,500)	(1,400)
Fair Value Measured at Net Asset Value Per Share | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	6,038	6,505
Fair Value Measured at Net Asset Value Per Share | Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 2,227	$ 2,243