Goodwill and Intangible Assets - Components (Details) - USD ($) $ in Millions	Sep. 30, 2022	Dec. 31, 2021
Schedule of Intangible Assets by Major Class [Line Items]
Goodwill, gross	$ 14,771	$ 14,782
Goodwill	14,771	14,782
Intangible assets, gross (excluding Goodwill)	359	242
Accumulated amortization	(176)	(131)
Intangible assets, net (excluding Goodwill)	183	111
Intangible assets gross including Goodwill	15,130	15,024
Total goodwill and other intangible assets, net carrying value	14,954	14,893
Commercial MSRs, gross	646	622
Commercial MSR, accumulated amortization	(215)	(202)
Total commercial MSRs	431	420
PCCR intangibles
Schedule of Intangible Assets by Major Class [Line Items]
Intangible assets, gross (excluding Goodwill)	146	29
Accumulated amortization	(18)	(10)
Intangible assets, net (excluding Goodwill)	128	19
Other intangible assets
Schedule of Intangible Assets by Major Class [Line Items]
Intangible assets, gross (excluding Goodwill)	213	213
Accumulated amortization	(158)	(121)
Intangible assets, net (excluding Goodwill)	$ 55	$ 92