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)													$ (35)		$ (12)		$ (14)
Interest Expense													734		801		827
Tax (provision) benefit													167		145		109
Total reclassifications from Accumulated other comprehensive income/(loss)	158	117	98	140	94	114	98	122	95	90	107	82	513	[1]	428	[1]	374	[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.