Amount after accumulated impairment loss of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
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-Subparagraph (SX 210.9-03(10)(1))
-URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 20
-Section 45
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-URI http://asc.fasb.org/extlink&oid=120320667&loc=SL49117168-202975

Reference 3: http://www.xbrl.org/2003/role/exampleRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 852
-SubTopic 10
-Section 55
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Name:	us-gaap_Goodwill
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill (Details) - USD ($) $ in Millions		12 Months Ended
	Feb. 25, 2021	Dec. 31, 2021
Goodwill [Roll Forward]
Beginning Balance		$ 2,664
Ending Balance		2,693
AQN Strategies
Goodwill [Roll Forward]
AQN Strategies acquisition	$ 9	9
XUP
Goodwill [Roll Forward]
AQN Strategies acquisition		20
Consumer Bank
Goodwill [Roll Forward]
Beginning Balance		1,752
Ending Balance		1,761
Consumer Bank \| AQN Strategies
Goodwill [Roll Forward]
AQN Strategies acquisition		9
Consumer Bank \| XUP
Goodwill [Roll Forward]
AQN Strategies acquisition		0
Commercial Bank
Goodwill [Roll Forward]
Beginning Balance		912
Ending Balance		932
Commercial Bank \| AQN Strategies
Goodwill [Roll Forward]
AQN Strategies acquisition		0
Commercial Bank \| XUP
Goodwill [Roll Forward]
AQN Strategies acquisition		$ 20