Commitments and Contingencies (Details) € in Millions, $ in Millions	12 Months Ended
	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)	Dec. 31, 2020 EUR (€)
Guarantor Obligations [Line Items]
Operating Lease, Expense	$ 25	$ 21	$ 28
Right-of-Use Asset Obtained in Exchange for Operating Lease Liability	12	42
Guarantor Obligations, Current Carrying Value	0	$ 0
Loss Contingency, Estimate of Possible Loss	51			€ 42
Lessee, Operating Lease, Liability, to be Paid, Year One	22
Lessee, Operating Lease, Liability, to be Paid, Year Two	18
Lessee, Operating Lease, Liability, to be Paid, Year Three	18
Lessee, Operating Lease, Liability, to be Paid, Year Four	17
Lessee, Operating Lease, Liability, to be Paid, Year Five	15
Lessee, Operating Lease, Liability, to be Paid, after Year Five	20
Lessee, operating lease, liability to be paid	110
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	$ 10
Operating Lease, Weighted Average Discount Rate, Percent	3.30%	3.10%		3.30%
Operating Lease, Weighted Average Remaining Lease Term	6 years	7 years		6 years
Operating Lease Liability [Member]
Guarantor Obligations [Line Items]
Operating Lease, Liability	$ 100
Financial Guarantee [Member]
Guarantor Obligations [Line Items]
Maximum potential payments	153	$ 53
Counter Guarantee [Member] | Ford Motor Company [Member]
Guarantor Obligations [Line Items]
Counter guarantee	$ 62	$ 48