Interim Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income before noncontrolling interests	$ 418	$ 475	$ 1,304	$ 1,665
Change in foreign currency cumulative translation gains and losses:
Foreign currency translation gains (losses), net of hedges	(39)	(6)	(81)	(4)
Related tax benefit (expense)	11	2	23	1
Change in unrealized gains and losses on AFS securities:
Unrealized holding gains (losses)	(1,187)	(30)	(2,734)	(584)
Related tax benefit (expense)	336	8	774	163
Reclassification adjustment for (gains) losses included in net income	0	0	(48)	0
Related tax benefit (expense)	0	0	14	0
Cumulative-effect adjustment for unrealized losses on securities transferred from AFS to HTM	0	(54)	0	(132)
Related tax benefit (expense)	0	15	0	36
Amortization of unrealized holding net gains (losses) on securities transferred from AFS to HTM	3	0	10	(5)
Related tax benefit (expense)	(1)	0	(3)	1
Change in unrealized gains and losses on cash flow hedges:
Reclassification adjustment for gains included in net income	(14)	(16)	(43)	(47)
Related tax benefit (expense)	4	4	12	13
Other comprehensive income (loss), net of tax	(887)	(77)	(2,076)	(558)
Comprehensive income (loss)	(469)	398	(772)	1,107
Comprehensive (income) loss attributable to noncontrolling interests	51	(88)	53	(226)
Comprehensive income (loss) attributable to SVBFG	$ (418)	$ 310	$ (719)	$ 881