Accumulated Other Comprehensive Income/(Loss) (Details 2) (USD $) In Millions, unless otherwise specified	3 Months Ended				6 Months Ended
	Jun. 30, 2013		Jun. 30, 2012		Jun. 30, 2013		Jun. 30, 2012
Other income (expense)	$ (22)		$ (10)		$ (25)		$ (9)
Interest	187		198		378		402
Tax (provision) benefit	44		39		87		85
Total reclassifications from Accumulated other comprehensive income/(loss)	111	[1]	104	[1]	252	[1]	224	[1]
Reclassifications out of Accumulated other comprehensive income/(loss) | Derivative financial instruments
Reclassifications before tax	(2)				(3)
Tax (provision) benefit	1				1
Total reclassifications from Accumulated other comprehensive income/(loss)	(1)				(2)
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	$ (2)				$ (3)

[1] Profit attributable to Caterpillar Financial Services Corporation.