Finance Receivables (Details 5) - USD ($) $ in Millions	Mar. 31, 2019	Dec. 31, 2018
Customer
Financing Receivable, Recorded Investment, Past Due
Recorded investment in finance receivables on non-accrual status	$ 828	$ 807
Customer | North America
Financing Receivable, Recorded Investment, Past Due
Recorded investment in finance receivables on non-accrual status	73	77
Customer | Europe
Financing Receivable, Recorded Investment, Past Due
Recorded investment in finance receivables on non-accrual status	171	154
Customer | Asia/Pacific
Financing Receivable, Recorded Investment, Past Due
Recorded investment in finance receivables on non-accrual status	6	4
Customer | Mining
Financing Receivable, Recorded Investment, Past Due
Recorded investment in finance receivables on non-accrual status	18	50
Customer | Latin America
Financing Receivable, Recorded Investment, Past Due
Recorded investment in finance receivables on non-accrual status	118	106
Customer | Caterpillar Power Finance
Financing Receivable, Recorded Investment, Past Due
Recorded investment in finance receivables on non-accrual status	442	416
Dealer
Financing Receivable, Recorded Investment, Past Due
Recorded investment in finance receivables on non-accrual status	$ 78	$ 78