Accumulated Other Comprehensive Income/(Loss) (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2014		Jun. 30, 2013		Jun. 30, 2014		Jun. 30, 2013
Other income (expense)	$ (2)		$ (36)		$ (9)		$ (40)
Interest	(155)		(187)		(317)		(378)
Tax (provision) benefit	(58)		(40)		(106)		(82)
Total reclassifications from Accumulated other comprehensive income/(loss)	148	[1]	98	[1]	279	[1]	238	[1]
Reclassifications out of Accumulated other comprehensive income/(loss) | Derivative financial instruments
Reclassifications before tax	(1)		(2)		(2)		(3)
Tax (provision) benefit	0		1		0		1
Total reclassifications from Accumulated other comprehensive income/(loss)	(1)		(1)		(2)		(2)
Reclassifications out of Accumulated other comprehensive income/(loss) | Derivative financial instruments | Foreign exchange contracts
Other income (expense)	0		0		0		0
Reclassifications out of Accumulated other comprehensive income/(loss) | Derivative financial instruments | Interest rate contracts
Interest	$ (1)		$ (2)		$ (2)		$ (3)

[1] Profit attributable to Caterpillar Financial Services Corporation.