Accumulated Other Comprehensive Income/(Loss) (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended												12 Months Ended
	Dec. 31, 2013	Sep. 30, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2012	Sep. 30, 2012	Jun. 30, 2012	Mar. 31, 2012	Dec. 31, 2011	Sep. 30, 2011	Jun. 30, 2011	Mar. 31, 2011	Dec. 31, 2013		Dec. 31, 2012		Dec. 31, 2011
Other income (expense)													$ (18)		$ (7)		$ (9)
Interest Expense													734		801		827
Tax (provision) benefit													174		148		111
Total reclassifications from Accumulated other comprehensive income/(loss)	160	118	111	141	99	109	104	120	95	93	107	83	530	[1]	432	[1]	378	[1]
Reclassifications out of Accumulated other comprehensive income/(loss) | Derivative financial instruments
Reclassifications before tax													(6)
Tax (provision) benefit													2
Total reclassifications from Accumulated other comprehensive income/(loss)													(4)
Reclassifications out of Accumulated other comprehensive income/(loss) | Derivative financial instruments | Foreign exchange contracts
Other income (expense)													0
Reclassifications out of Accumulated other comprehensive income/(loss) | Derivative financial instruments | Interest rate contracts
Interest Expense													$ (6)

[1] Profit attributable to Caterpillar Financial Services Corporation.