Accumulated Other Comprehensive Income/(Loss) (Details 2) - USD ($) $ in Millions		3 Months Ended
		Mar. 31, 2020	Mar. 31, 2019
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income (expense)		$ (10)	$ (4)
Interest		(175)	(201)
Reclassifications before tax		127	142
Tax (provision) benefit		(33)	(38)
Total reclassifications from Accumulated other comprehensive income/(loss)	[1]	90	98
Reclassifications out of Accumulated other comprehensive income/(loss) | Derivative financial instruments
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Reclassifications before tax		77	14
Tax (provision) benefit		(16)	(3)
Total reclassifications from Accumulated other comprehensive income/(loss)		61	11
Reclassifications out of Accumulated other comprehensive income/(loss) | Derivative financial instruments | Cross currency contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income (expense)		71	6
Interest		11	7
Reclassifications out of Accumulated other comprehensive income/(loss) | Derivative financial instruments | Interest rate contracts
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Interest		$ (5)	$ 1

[1] Profit attributable to Caterpillar Financial Services Corporation.