Debt - Credit Facilties and Committed Liquidity Programs (Details) £ in Millions, $ in Millions	Dec. 31, 2017 USD ($)	Dec. 31, 2017 GBP (£)
FCE Bank plc [Member]
Schedule Of Debt [Line Items]
Debt Covenant Minimum Net Worth Requirement	$ 500
Ford Motor Company [Member]
Schedule Of Debt [Line Items]
Borrowing capacity under credit facilities	3,000
Unsecured Debt [Member]
Schedule Of Debt [Line Items]
Borrowing capacity under credit facilities	6,300
Borrowing availability	5,200
Syndicated Credit Facility [Member] \| FCE Bank plc [Member]
Schedule Of Debt [Line Items]
Borrowing capacity under credit facilities	1,300	£ 945
Borrowing availability	1,000	£ 745
Revolving Credit Facility [Member]
Schedule Of Debt [Line Items]
Borrowing availability	3,000
Revolving Credit Facility [Member] \| Ford Motor Company [Member]
Schedule Of Debt [Line Items]
Borrowing capacity under credit facilities	$ 13,400
Revolving Credit Facility [Member] \| Ford Motor Company [Member] \| Committments maturing by 2022 [Member]
Schedule Of Debt [Line Items]
Line of Credit, Percent Maturing	75.00%	75.00%
Revolving Credit Facility [Member] \| Ford Motor Company [Member] \| Commitments maturing by 2020 [Member]
Schedule Of Debt [Line Items]
Line of Credit, Percent Maturing	25.00%	25.00%
Contractually Committed Liquidity Facilities [Member]
Schedule Of Debt [Line Items]
Commitment To Sell Commercial Paper Conduits Maximum	$ 33,400
Commitment To Sell Commercial Paper Conduits Current	17,900
Commitment To Sell Commercial Paper Conduits Utilized	17,200
Operating Lease [Member] \| Contractually Committed Liquidity Facilities [Member]
Schedule Of Debt [Line Items]
Commitment To Sell Commercial Paper Conduits Maximum	10,900
Retail [Member] \| Contractually Committed Liquidity Facilities [Member]
Schedule Of Debt [Line Items]
Commitment To Sell Commercial Paper Conduits Maximum	16,100
Wholesale [Member] \| Contractually Committed Liquidity Facilities [Member]
Schedule Of Debt [Line Items]
Commitment To Sell Commercial Paper Conduits Maximum	$ 6,400

Current amount the company has committed to sell commercial paper conduits.

No definition available.

Name:	fmcc_CommitmentToSellCommercialPaperConduitsCurrent
Namespace Prefix:	fmcc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Commitment To Sell Commercial Paper Conduits Maximum

+ References

No definition available.

+ Details

Name:	fmcc_CommitmentToSellCommercialPaperConduitsMaximum
Namespace Prefix:	fmcc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Current amount the company has utilized as part of its commitment to sell commercial paper conduits.

+ References

No definition available.

+ Details

Name:	fmcc_CommitmentToSellCommercialPaperConduitsUtilized
Namespace Prefix:	fmcc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Covenant Minimum Net Worth Requirement

+ References

No definition available.

+ Details

Name:	fmcc_DebtCovenantMinimumNetWorthRequirement
Namespace Prefix:	fmcc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Line of Credit, Percent Maturing

+ References

No definition available.

+ Details

Name:	fmcc_LineofCreditPercentMaturing
Namespace Prefix:	fmcc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Schedule Of Debt [Line Items]

+ References

No definition available.

+ Details

Name:	fmcc_ScheduleOfDebtLineItems
Namespace Prefix:	fmcc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Details

Name:	dei_LegalEntityAxis=fmcc_FceBankPlcMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RelatedPartyTransactionsByRelatedPartyAxis=fmcc_FordMotorCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_UnsecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=fmcc_SyndicatedCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=fmcc_FordMotorCompanyMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	fmcc_MaturityDateAxis=fmcc_Commitmentsmaturingby2020Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	fmcc_MaturityDateAxis=fmcc_Commitmentsmaturingby2018Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	fmcc_DebtTypeAxis=fmcc_ContractuallyCommittedLiquidityFacilitiesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_AccountsNotesLoansAndFinancingReceivableByReceivableTypeAxis=fmcc_OperatingLeaseMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=us-gaap_AutomobileLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_FinancingReceivablePortfolioSegmentAxis=fmcc_WholesaleMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: