Consolidated Statements of Comprehensive Income (USD $) In Millions, unless otherwise specified	12 Months Ended
Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Statement of Comprehensive Income [Abstract]
Profit of consolidated companies	$ 544us-gaap_ProfitLoss	$ 527us-gaap_ProfitLoss	$ 439us-gaap_ProfitLoss
Other comprehensive income (loss), net of tax:
Foreign currency translation, net of tax (expense)/benefit	(481)	(59)	62
Derivative financial instruments:
Gains (losses) deferred, net of tax (expense)/benefit	(4)	(1)	1
(Gains) losses reclassified to earnings, net of tax expense/(benefit)	4	4	(3)
Total Other comprehensive income (loss), net of tax	(481)	(56)	60
Comprehensive income (loss)	63	471	499
Less: Comprehensive income attributable to the noncontrolling interests	9	17	11
Comprehensive income (loss) attributable to Caterpillar Financial Services Corporation	$ 54us-gaap_ComprehensiveIncomeNetOfTax	$ 454us-gaap_ComprehensiveIncomeNetOfTax	$ 488us-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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