Interim Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Statement of Comprehensive Income [Abstract]
Net income before noncontrolling interests	$ 353	$ 628	$ 886	$ 1,190
Change in foreign currency cumulative translation gains and losses:
Foreign currency translation (losses) gains	(33)	2	(42)	2
Related tax benefit (expense)	9	(1)	12	(1)
Change in unrealized gains and losses on AFS securities:
Unrealized holding gains (losses)	(569)	270	(1,547)	(554)
Related tax benefit (expense)	161	(75)	438	154
Reclassification adjustment for loss (gains) included in net income	1	0	(48)	0
Related tax expense	0	0	14	0
Cumulative-effect adjustment for unrealized losses on securities transferred from AFS to HTM	0	(87)	0	(78)
Related tax benefit	0	25	0	22
Amortization of unrealized holding net gains (losses) on securities transferred from AFS to HTM	4	(2)	7	(5)
Related tax (expense) benefit	(1)	0	(2)	1
Change in unrealized gains and losses on cash flow hedges:
Reclassification adjustment for gains included in net income	(14)	(16)	(29)	(31)
Related tax expense	4	5	8	9
Other comprehensive income (loss), net of tax	(438)	121	(1,189)	(481)
Comprehensive income (loss)	(85)	749	(303)	709
Comprehensive (income) loss attributable to noncontrolling interests	20	(113)	2	(138)
Comprehensive income (loss) attributable to SVBFG	$ (65)	$ 636	$ (301)	$ 571