Cat Financial Financing Activities (Details TDR) $ in Millions	3 Months Ended
	Mar. 31, 2022 USD ($) Contracts	Mar. 31, 2021 USD ($) Contracts
Customer
Finance receivables modified as TDRs
Pre-TDR Amortized Cost	$ 7	$ 11
Post-TDR Amortized Cost	7	5
TDRs which had been modified within twelve months of the default date
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	5	10
Customer | North America
TDRs which had been modified within twelve months of the default date
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	0	1
Customer | EMEA
Finance receivables modified as TDRs
Pre-TDR Amortized Cost	1	0
Post-TDR Amortized Cost	1	0
Customer | Asia/Pacific
TDRs which had been modified within twelve months of the default date
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	0	4
Customer | Mining
Finance receivables modified as TDRs
Pre-TDR Amortized Cost	0	11
Post-TDR Amortized Cost	0	5
TDRs which had been modified within twelve months of the default date
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	5	0
Customer | Caterpillar Power Finance
Finance receivables modified as TDRs
Pre-TDR Amortized Cost	6	0
Post-TDR Amortized Cost	6	0
TDRs which had been modified within twelve months of the default date
Financing Receivable, Troubled Debt Restructuring, Subsequent Default	$ 0	$ 5
Dealer
Finance receivables modified as TDRs
Number of Contracts (in contracts) | Contracts	0	0