Transactions with Related Parties (Details) (USD $)	3 Months Ended				12 Months Ended
	Dec. 31, 2013	Jun. 30, 2013	Sep. 30, 2011	Mar. 31, 2011	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Related Party Transaction
Dividend paid to Caterpillar					$ 200,000,000	$ 250,000,000	$ 600,000,000
Maximum borrowing capacity from Caterpillar, Variable lending agreements	2,330,000,000				2,330,000,000
Maximum lending capacity to Caterpillar, Variable lending agreements	1,290,000,000				1,290,000,000
Amount available, Committed credit facility extended to Caterpillar	2,000,000,000				2,000,000,000
Notes payable to Caterpillar	1,118,000,000				1,118,000,000	208,000,000	0
Notes receivable from Caterpillar	345,000,000				345,000,000	360,000,000	327,000,000
Discounts earned on purchased receivables					233,000,000	241,000,000	212,000,000
Caterpillar
Related Party Transaction
Capital contributions from Caterpillar					0	0	0
Dividend paid to Caterpillar	100,000,000	100,000,000	300,000,000	300,000,000	200,000,000	250,000,000	600,000,000
Maximum borrowing capacity from Caterpillar, Variable lending agreements	2,330,000,000				2,330,000,000
Maximum lending capacity to Caterpillar, Variable lending agreements	1,290,000,000				1,290,000,000
Amount available, Committed credit facility extended to Caterpillar	2,000,000,000				2,000,000,000
Interest expense, Caterpillar					7,000,000	4,000,000	1,000,000
Interest income on Notes Receivable with Caterpillar					19,000,000	21,000,000	16,000,000
Fees on committed credit facility extended to Caterpillar					41,000,000	41,000,000	40,000,000
Purchases of receivables from Caterpillar					33,018,000,000	36,665,000,000	32,068,000,000
Discounts earned on purchased receivables					233,000,000	241,000,000	212,000,000
Balance of purchased receivables	3,092,000,000				3,092,000,000	3,114,000,000	3,154,000,000
Marketing program payments received					189,000,000	160,000,000	131,000,000
Charges for employee medical plans and postretirement benefit plans administered by Caterpillar					27,000,000	26,000,000	23,000,000
Contributions to defined benefit plans					7,000,000	7,000,000	7,000,000
Stock based compensation expense					11,000,000	10,000,000	8,000,000
Operational and administrative support charges reimbursed to Caterpillar					33,000,000	32,000,000	27,000,000
Administrative support services to certain Caterpillar subsidiaries reimbursed by Caterpillar					$ 12,000,000	$ 10,000,000	$ 9,000,000