Financing Activities (Details 6) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2015	Sep. 30, 2014	Sep. 30, 2015	Sep. 30, 2014	Dec. 31, 2014
Loans Managed, Securitized or Asset-backed Financing Arrangement
Off balance-sheet managed assets	$ 308		$ 308		$ 316
Servicing liability	2		2		$ 1
Purchase of trade receivables from Caterpillar Entities
Amortization of receivables purchase discount	$ 53	$ 60	$ 169	$ 183