Accumulated Other Comprehensive Income/(Loss) (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014		Mar. 31, 2013
Other income (expense)	$ (5)		$ (3)
Interest	(162)		(191)
Tax (provision) benefit	(49)		(43)
Total reclassifications from Accumulated other comprehensive income/(loss)	136	[1]	141	[1]
Reclassifications out of Accumulated other comprehensive income/(loss) | Derivative financial instruments
Reclassifications before tax	(1)		(1)
Tax (provision) benefit	0		0
Total reclassifications from Accumulated other comprehensive income/(loss)	(1)		(1)
Reclassifications out of Accumulated other comprehensive income/(loss) | Derivative financial instruments | Foreign exchange contracts
Other income (expense)	0		0
Reclassifications out of Accumulated other comprehensive income/(loss) | Derivative financial instruments | Interest rate contracts
Interest	$ (1)		$ (1)

[1] Profit attributable to Caterpillar Financial Services Corporation.