Accumulated Other Comprehensive Income/(Loss) (Details 2) - Reclassifications out of Accumulated other comprehensive income/(loss) - USD ($) $ in Millions		3 Months Ended		6 Months Ended
		Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income (expense)		$ (5)	$ (2)	$ (14)	$ (9)
Interest		(150)	(155)	(301)	(317)
Tax (provision) benefit		(46)	(58)	(98)	(106)
Total reclassifications from Accumulated other comprehensive income/(loss)	[1]	104	148	237	279
Derivative financial instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications before tax		(2)	(1)	(3)	(2)
Tax (provision) benefit		1	0	1	0
Total reclassifications from Accumulated other comprehensive income/(loss)		(1)	(1)	(2)	(2)
Derivative financial instruments | Foreign exchange contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income (expense)		0	0	0	0
Derivative financial instruments | Interest rate contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest		$ (2)	$ (1)	$ (3)	$ (2)

[1] Profit attributable to Caterpillar Financial Services Corporation.