Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Statement of Comprehensive Income [Abstract]
Profit of consolidated companies	$ 145	$ 138	$ 289	$ 268
Other comprehensive income (loss), net of tax (Note 5):
Foreign currency translation	(23)	222	(44)	310
Derivative financial instruments	21	(7)	33	(19)
Total other comprehensive income (loss), net of tax	(2)	215	(11)	291
Comprehensive income	143	353	278	559
Less: Comprehensive income (loss) attributable to noncontrolling interests	1	1	1	1
Comprehensive income attributable to Caterpillar Financial Services Corporation	$ 142	$ 352	$ 277	$ 558