Goodwill and Intangible Assets - Components (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Schedule of Intangible Assets by Major Class [Line Items]
Goodwill, gross	$ 15,060		$ 15,060		$ 14,777
Goodwill	15,060		15,060		14,777
Intangible assets, gross (excluding Goodwill)	545		545		342
Accumulated amortization	(189)		(189)		(183)
Intangible assets, net (excluding Goodwill)	356		356		159
Intangible assets gross including Goodwill	15,605		15,605		15,119
Total goodwill and other intangible assets, net carrying value	15,416		15,416		14,936
Commercial MSRs, gross	653		653		660
Commercial MSR, accumulated amortization	(236)		(236)		(223)
Total commercial MSRs	417		417		437
Amortization of Intangibles	22	$ 14	36	$ 28
PCCR intangibles
Schedule of Intangible Assets by Major Class [Line Items]
Intangible assets, gross (excluding Goodwill)	369		369		147
Accumulated amortization	(57)		(57)		(26)
Intangible assets, net (excluding Goodwill)	312		312		121
Other intangible assets
Schedule of Intangible Assets by Major Class [Line Items]
Intangible assets, gross (excluding Goodwill)	176		176		195
Accumulated amortization	(132)		(132)		(157)
Intangible assets, net (excluding Goodwill)	$ 44		$ 44		$ 38