Finance Receivables (Details 6) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Financing Receivable, Past Due
Period after which collection of future income is considered as not probable	120 days
Customer
Financing Receivable, Past Due
Amortized Cost, Non-accrual With an Allowance	$ 191		$ 184
Amortized Cost, Non-accrual Without an Allowance	20		26
Amortized Cost, 91+ Still Accruing	35		36
Interest income recognized for finance receivables on non-accrual status	1	$ 3
Customer | North America
Financing Receivable, Past Due
Amortized Cost, Non-accrual With an Allowance	43		47
Amortized Cost, Non-accrual Without an Allowance	6		9
Amortized Cost, 91+ Still Accruing	13		12
Customer | EAME
Financing Receivable, Past Due
Amortized Cost, Non-accrual With an Allowance	20		18
Amortized Cost, Non-accrual Without an Allowance	1		1
Amortized Cost, 91+ Still Accruing	2		2
Customer | Asia/Pacific
Financing Receivable, Past Due
Amortized Cost, Non-accrual With an Allowance	13		19
Amortized Cost, Non-accrual Without an Allowance	0		0
Amortized Cost, 91+ Still Accruing	18		7
Customer | Mining
Financing Receivable, Past Due
Amortized Cost, Non-accrual With an Allowance	28		8
Amortized Cost, Non-accrual Without an Allowance	1		1
Amortized Cost, 91+ Still Accruing	1		14
Customer | Latin America
Financing Receivable, Past Due
Amortized Cost, Non-accrual With an Allowance	56		52
Amortized Cost, Non-accrual Without an Allowance	0		4
Amortized Cost, 91+ Still Accruing	1		1
Customer | Caterpillar Power Finance
Financing Receivable, Past Due
Amortized Cost, Non-accrual With an Allowance	31		40
Amortized Cost, Non-accrual Without an Allowance	12		11
Amortized Cost, 91+ Still Accruing	0		0
Dealer
Financing Receivable, Past Due
Amortized Cost, 91+ Still Accruing	0		0
Interest income recognized for finance receivables on non-accrual status	0	$ 0
Dealer | Latin America
Financing Receivable, Past Due
Amortized Cost, Non-accrual With an Allowance	$ 78		$ 78