Document and Entity Information - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2019	Feb. 04, 2020	Jun. 30, 2019
Document and Entity Information [Abstract]
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2019
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Entity Registrant Name	General Motors Financial Company, Inc.
Entity Central Index Key	0000804269
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Entity Common Stock, Shares Outstanding		5,050,000
Entity Well-known Seasoned Issuer	Yes
Entity Voluntary Filers	No
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Public Float			$ 0
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Shell Company	false