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, 2021	Dec. 31, 2020	Dec. 31, 2019
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 45,909	$ 48,355	$ 44,253
Fair Value at January 1	16	17
Attributable to Assets Held at December 31	(2)	(2)
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Attributable To Assets Sold	0	1
Net Purchases/ (Settlements)	5	0
Transfers Into/ (Out of) Level 3	1	0
Fair Value at December 31	20	16
Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	33,085	33,820	$ 29,958
Fair Value at January 1	6,006	5,572
Attributable to Assets Held at December 31	(943)	473
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Attributable To Assets Sold	153	1
Net Purchases/ (Settlements)	687	1
Transfers Into/ (Out of) Level 3	117	(41)
Fair Value at December 31	6,020	6,006
Non-U.S. Plans | Ford Werke GmbH
Defined Benefit Plan Disclosure [Line Items]
Fair Value at January 1	5,000
Fair Value at December 31	4,700	5,000
Fair Value, Inputs, Level 1 | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	9,804	10,995
Fair Value, Inputs, Level 1 | Non-U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	797	704
Fair Value Measured at Net Asset Value Per Share | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	6,689	6,337
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	$ 2,363	$ 2,311