Main differences between IFRS and Swiss GAAP (Narrative) (Detail)	12 Months Ended
Dec. 31, 2021
Entity [Table]
Goodwill, maximum useful life for justified exceptional cases (in years)	10 years
UBS AG [Member]
Entity [Table]
Goodwill, maximum useful life for justified exceptional cases (in years)	10 years

This element represents the maximum useful life of goodwill for justified exceptional cases as accounted for under Swiss GAAP.

No definition available.

Name:	ubs_GoodwillUsefulLifeExceptionalCasesMaximum
Namespace Prefix:	ubs_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration