Description of the Plan (Details)	12 Months Ended
Dec. 31, 2025 USD ($) year	Dec. 31, 2024 USD ($)
EBP, Description of Plan [Line Items]
Employer contribution, maximum participant compensation matched, amount per participant	$ 16,000
EBP 004
EBP, Description of Plan [Line Items]
Eligibility requirements, notification period	30 days
Employer contribution maximum vesting age \| year	65
Maximum amount a participant can transfer of account balance	50.00%
Participant contribution, pretax, maximum annual compensation to total compensation, percentage	75.00%
Maximum participant contribution, after-tax	$ 25,000	$ 25,000
Participant contribution, automatic, annual increase deferral rate	1.00%
Employer contribution, matching percentage	100.00%
Employer contribution, participant compensation matched, percentage	7.00%
Employer contribution, basic company contribution to each participant with eligible base pay less than threshold	$ 750
Employer contribution, basic company contribution, eligible base pay threshold	$ 100,000
Employer contribution, basic company contribution, service requirement for eligibility	1 year
Employer contribution vesting service period	3 years
Employer contribution vesting percentage	100.00%
Forfeited nonvested account	$ 9,362,425	$ 9,612,624
General purpose loan, basis spread on variable rate	1.00%	1.00%
Primary residence loan, basis spread on variable rate	1.00%	1.00%
Note receivable from participant, account, maximum borrowing, amount	$ 50,000
Note receivable from participant, account, maximum borrowing, to total account, percentage	50.00%
Participant, payment of benefits, quarterly installment duration option	10 years
Involuntary cash-out limit	$ 1,000
EBP 004 \| EBP, Basic Company Contributions
EBP, Description of Plan [Line Items]
Employer contribution vesting service period	3 years
EBP 004 \| Minimum
EBP, Description of Plan [Line Items]
Participant contribution, automatic, deferral rate	7.00%
Plan restrictions, buy and sell duration	15 days
Note receivable from participant, general loan, borrowing term	12 months
Note receivable from participant, primary residence loan, borrowing term	49 months
EBP 004 \| Maximum
EBP, Description of Plan [Line Items]
Participant contribution, automatic, deferral rate	10.00%
Plan restrictions, buy and sell duration	60 days
Note receivable from participant, general loan, borrowing term	48 months
Note receivable from participant, primary residence loan, borrowing term	120 months

EBP, Eligibility Requirements, Notification Period

No definition available.

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- Definition

EBP, Employer Contribution, Basic Company Contribution, Eligible Base Pay Threshold

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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- Definition

EBP, Employer Contribution, Basic Company Contribution, Service Requirement For Eligibility

+ References

No definition available.

+ Details

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- Definition

EBP, Employer Contribution, Basic Company Contribution To Each Participant With Eligible Base Pay Less Than Threshold

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
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Period Type:	duration

- Definition

EBP, Employer Contribution, Maximum Participant Compensation Matched, Amount Per Participant

+ References

No definition available.

+ Details

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Namespace Prefix:	bk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Maximum Vesting age of participant for company contribution and/ or investment earning in Company Matching Contributions, Fixed Rate Contributions, Discretionary Profit-Sharing Contributions, Qualified Non-Elective Contributions, and Disability Contributions.

+ References

No definition available.

+ Details

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Namespace Prefix:	bk_
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- Definition

Company contribution and/ or investment earning percentage vesting to the participant in Company Matching Contributions, Fixed Rate Contributions, Discretionary Profit-Sharing Contributions, Qualified Non-Elective Contributions, and Disability Contributions, upon completion of minimum service period or attainment of maximum vesting age

+ References

No definition available.

+ Details

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Period Type:	duration

- Definition

Minimum Vesting service period for company contribution and/ or investment earning to the participant in Company Matching Contributions, Fixed Rate Contributions, Discretionary Profit-Sharing Contributions, Qualified Non-Elective Contributions, and Disability Contributions.

+ References

No definition available.

+ Details

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Namespace Prefix:	bk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Involuntary Cash-out Limit

+ References

No definition available.

+ Details

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Namespace Prefix:	bk_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

EBP, Maximum Amount A Participant Can Transfer Of Account Balance

+ References

No definition available.

+ Details

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Namespace Prefix:	bk_
Data Type:	dtr-types:percentItemType
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Period Type:	instant

- Definition

EBP, Maximum Participant Contribution, After-Tax, Amount

+ References

No definition available.

+ Details

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Namespace Prefix:	bk_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

EBP, Note Receivable From Participant, General Loan, Borrowing Term

+ References

No definition available.

+ Details

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Namespace Prefix:	bk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Note Receivable From Participant, Primary Residence Loan, Borrowing Term

+ References

No definition available.

+ Details

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Namespace Prefix:	bk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

Annual increase in percentage of eligible compensation contributed for participant automatically enrolled in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) until the contribution reaches maximum threshold.

+ References

No definition available.

+ Details

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Namespace Prefix:	bk_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Participant Loan, General Purpose Loan, Basis Spread On Variable Rate

+ References

No definition available.

+ Details

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Namespace Prefix:	bk_
Data Type:	dtr-types:percentItemType
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Period Type:	duration

- Definition

EBP, Participant Loan, Primary Residence Loan, Basis Spread On Variable Rate

+ References

No definition available.

+ Details

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Namespace Prefix:	bk_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Participant, Payment Of Benefits, Quarterly Installment Duration Option

+ References

No definition available.

+ Details

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Namespace Prefix:	bk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

- Definition

EBP, Plan Restrictions, Buy and Sell Duration

+ References

No definition available.

+ Details

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Namespace Prefix:	bk_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	instant

- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (a)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

+ Details

Name:	us-gaap-ebp_EmployeeBenefitPlanDescriptionOfPlanLineItems
Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of employer matching contribution on eligible participant contribution to employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of participant compensation eligible for employer matching contribution for participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of plan asset, in forfeited nonvested account, no longer allocated to participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

Reference 1: http://www.xbrl.org/2003/role/exampleRef
-Topic 962
-SubTopic 325
-Name Accounting Standards Codification
-Section 55
-Paragraph 17
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478873/962-325-55-17

Reference 2: http://www.xbrl.org/2003/role/disclosureRef
-Topic 962
-SubTopic 205
-Name Accounting Standards Codification
-Section 50
-Paragraph 1
-Subparagraph (j)
-Publisher FASB
-URI https://asc.fasb.org/1943274/2147478416/962-205-50-1

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Amount of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow.

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Percentage of maximum account balance that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)) can borrow to total participant account balance.

+ References

+ Details

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Data Type:	dtr-types:percentItemType
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Period Type:	instant

- Definition

Percentage of eligible compensation contributed for participant automatically enrolled in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)).

+ References

+ Details

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Period Type:	duration

- Definition

Percentage of maximum pretax annual compensation that participant in employee stock purchase, saving, or similar plan (employee benefit plan (EBP)), is permitted to contribute to total pretax annual compensation.

+ References

+ Details

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Namespace Prefix:	us-gaap-ebp_
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- Details

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Namespace Prefix:
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- Details

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- Details

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- Details

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