Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	3 Months Ended
Mar. 31, 2015	Mar. 31, 2014
Statement of Comprehensive Income [Abstract]
Profit of consolidated companies	$ 135us-gaap_ProfitLoss	$ 134us-gaap_ProfitLoss
Other comprehensive income (loss), net of tax:
Foreign currency translation, net of tax (expense)/benefit	(402)	4
Derivative financial instruments:
Gains (losses) deferred, net of tax (expense)/benefit	1	(2)
(Gains) losses reclassified to earnings, net of tax expense/(benefit)	1	1
Total Other comprehensive income (loss), net of tax	(400)	3
Comprehensive income (loss)	(265)	137
Less: Comprehensive income attributable to the noncontrolling interests	1	2
Comprehensive income (loss) attributable to Caterpillar Financial Services Corporation	$ (266)us-gaap_ComprehensiveIncomeNetOfTax	$ 135us-gaap_ComprehensiveIncomeNetOfTax

Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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