Name:	bk_ExcessCET1RiskBasedCapitalAboveApplicableThreshold
Namespace Prefix:	bk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Excess SLR Risk Based Capital Above Applicable Threshold

No definition available.

Name:	bk_ExcessSLRRiskBasedCapitalAboveApplicableThreshold
Namespace Prefix:	bk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Excess Tier One Leverage Capital Above Applicable Threshold. The Federal Reserve’s regulations do not establish well capitalized thresholds for these measures for bank holding companies. Insured depositary institutions represent well capitalized thresholds. Bank holding companies include capital buffers as applicable.

No definition available.

Name:	bk_ExcessTierOneLeverageCapitalAboveApplicableThreshold
Namespace Prefix:	bk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Excess Tier One Risk Based Capital Above Applicable Threshold. The Federal Reserve’s regulations have established well capitalized thresholds for these measures for bank holding companies and insured depositary institutions. Bank holding company also includes applicable buffers.

No definition available.

Name:	bk_ExcessTierOneRiskBasedCapitalAboveApplicableThreshold
Namespace Prefix:	bk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Excess Total Risk Based Capital Above Applicable Threshold. The Federal Reserve’s regulations have established well capitalized thresholds for these measures for bank holding companies and insured depositary institutions.

No definition available.

Name:	bk_ExcessTotalRiskBasedCapitalAboveApplicableThreshold
Namespace Prefix:	bk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.