Investment Securities - Schedule Of Amortized Cost And Fair Value By Contractual Maturity (Details) - USD ($) $ in Millions	Jun. 30, 2021	Dec. 31, 2020
Available-for-Sale, Amortized Cost
Within 1 year	$ 680
After 1 year through 5 years	148
After 5 years through 10 years	346
After 10 years	676
Subtotal	1,850
Government agency issued MBS and CMO	6,450
Securities available for sale, amortized cost	8,300
Available-for-Sale, Fair Value
Within 1 year	681
After 1 year through 5 years	150
After 5 years through 10 years	355
After 10 years	712
Subtotal	1,898
Government agency issued MBS and CMO	6,490
Securities available-for-sale	$ 8,388	$ 8,047

Amortized cost of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale), with single maturity date and allocated without single maturity date, maturing in sixth through tenth fiscal year following current fiscal year. Excludes interim and annual periods when interim periods are reported from current statement of financial position date (rolling approach).

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=123581744&loc=d3e27198-111563