Goodwill and Intangible Assets - Components (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Schedule of Intangible Assets by Major Class [Line Items]
Goodwill, gross	$ 14,779		$ 14,777
Goodwill	14,779		14,777
Intangible assets, gross (excluding Goodwill)	533		342
Accumulated amortization	(166)		(183)
Intangible assets, net (excluding Goodwill)	367		159
Intangible assets gross including Goodwill	15,312		15,119
Total goodwill and other intangible assets, net carrying value	15,146		14,936
Commercial MSRs, gross	658		660
Commercial MSR, accumulated amortization	(233)		(223)
Total commercial MSRs	425		437
Amortization of Intangibles	14	$ 14
PCCR intangibles
Schedule of Intangible Assets by Major Class [Line Items]
Intangible assets, gross (excluding Goodwill)	369		147
Accumulated amortization	(37)		(26)
Intangible assets, net (excluding Goodwill)	332		121
Other intangible assets
Schedule of Intangible Assets by Major Class [Line Items]
Intangible assets, gross (excluding Goodwill)	164		195
Accumulated amortization	(129)		(157)
Intangible assets, net (excluding Goodwill)	$ 35		$ 38