Debt Instrument, Issuance, Percentage of Principal Amount

No definition available.

Name:	br_DebtInstrumentIssuancePercentageofPrincipalAmount
Namespace Prefix:	br_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Line of Credit Facility, Commitment Fee Percentage, Step Down

+ References

No definition available.

+ Details

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

- Definition

Line of Credit Facility, Commitment Fee Percentage, Step Up

+ References

No definition available.

+ Details

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Namespace Prefix:	br_
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Balance Type:	na
Period Type:	duration

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	dtr-types:percentItemType
Balance Type:	na
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- Definition

Face (par) amount of debt instrument at time of issuance.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The average effective interest rate during the reporting period.

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- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

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Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

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- 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.

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+ Details

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Period Type:	duration

- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentTerm
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Data Type:	xbrli:durationItemType
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Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

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+ Details

Name:	us-gaap_LineOfCredit
Namespace Prefix:	us-gaap_
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Balance Type:	credit
Period Type:	instant

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

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Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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- Definition

The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission.

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BORROWINGS - Additional Information (Details) - USD ($)			1 Months Ended						3 Months Ended		9 Months Ended
BORROWINGS - Additional Information (Details) - USD ($)	Aug. 21, 2025	Aug. 17, 2023	Dec. 31, 2024	May 31, 2021	Apr. 30, 2021	Mar. 31, 2021	Dec. 31, 2019	Jun. 30, 2016	Mar. 31, 2026	Mar. 31, 2025	Mar. 31, 2026	Mar. 31, 2025	Jun. 30, 2025
Debt Instrument [Line Items]
Principal amount									$ 3,238,300,000		$ 3,238,300,000
Fair value of fixed-rate notes									3,079,300,000		3,079,300,000
Outstanding amount of line of credit									0		0		$ 0
Revolving Credit Facility
Debt Instrument [Line Items]
Principal amount									238,300,000		238,300,000
Fair value of fixed-rate notes									238,300,000		238,300,000
Senior Notes, Excluding Current Maturities
Debt Instrument [Line Items]
Principal amount									1,750,000,000		1,750,000,000
Fair value of fixed-rate notes									1,592,200,000		$ 1,592,200,000
Fiscal 2025 Revolving Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity			$ 1,500,000,000
Debt instrument, term			5 years
Annual facility fee (as basis points)											0.125%
Annual facility fee, step up (as basis points)											0.25%
Fiscal 2025 Revolving Credit Facility \| Revolving Credit Facility \| SOFR
Debt Instrument [Line Items]
Basis spread on variable rate											1.00%
Fiscal 2025 Revolving Credit Facility \| Revolving Credit Facility \| SOFR, Step Up
Debt Instrument [Line Items]
Basis spread on variable rate											1.25%
Fiscal 2025 Revolving Credit Facility \| Revolving Credit Facility \| SOFR, Step Down
Debt Instrument [Line Items]
Basis spread on variable rate											0.785%
Fiscal 2025 Revolving Credit Facility \| Senior Notes
Debt Instrument [Line Items]
Annual facility fee, step down (as basis points)											0.09%
Fiscal 2021 Revolving Credit Facility \| Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity					$ 1,500,000,000
Debt instrument, term					5 years
Fiscal 2025 Revolving Credit Facility U.S. Dollar Tranche \| Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity									1,000,000,000.0		$ 1,000,000,000.0
Principal amount									170,000,000.0		170,000,000.0
Fair value of fixed-rate notes									170,000,000.0		170,000,000.0
Fiscal 2025 Revolving Credit Facility Multicurrency Tranche \| Revolving Credit Facility
Debt Instrument [Line Items]
Maximum borrowing capacity									500,000,000.0		500,000,000.0
Principal amount									68,300,000		68,300,000
Fair value of fixed-rate notes									$ 68,300,000		$ 68,300,000
Revolving Credit Facilities \| Revolving Credit Facility
Debt Instrument [Line Items]
Weighted-average interest rate									4.33%	5.07%	4.46%	5.68%
Fiscal 2021 Term Loans \| Term Loans
Debt Instrument [Line Items]
Debt instrument, term						18 months
Principal amount						$ 2,550,000,000
Fiscal 2021 Term Loans, Tranche 1 \| Term Loans
Debt Instrument [Line Items]
Principal amount						1,000,000,000.0
Fiscal 2021 Term Loans, Tranche 2 \| Term Loans
Debt Instrument [Line Items]
Principal amount						$ 1,550,000,000
Fiscal 2021 Term Loans, Tranche 2 \| Term Loans \| SOFR
Debt Instrument [Line Items]
Basis spread on variable rate						1.00%
Fiscal 2021 Term Loans, Tranche 2 \| Term Loans \| SOFR, Step Up
Debt Instrument [Line Items]
Basis spread on variable rate						1.25%
Fiscal 2021 Term Loans, Tranche 2 \| Term Loans \| SOFR, Step Down
Debt Instrument [Line Items]
Basis spread on variable rate						0.75%
Fiscal 2024 Amended Term Loans \| Term Loans
Debt Instrument [Line Items]
Principal amount		$ 1,300,000,000
Fiscal 2024 Amended Term Loans \| Term Loans \| SOFR
Debt Instrument [Line Items]
Basis spread on variable rate		1.25%
Fiscal 2024 Amended Term Loans \| Term Loans \| SOFR, Step Up
Debt Instrument [Line Items]
Basis spread on variable rate		1.375%
Fiscal 2024 Amended Term Loans \| Term Loans \| SOFR, Step Down \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate		1.125%
Fiscal 2024 Amended Term Loans \| Term Loans \| SOFR, Step Down \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate		1.00%
Fiscal 2026 Term Loan \| Term Loans
Debt Instrument [Line Items]
Principal amount	$ 750,000,000.0								$ 750,000,000.0		$ 750,000,000.0
Fair value of fixed-rate notes									750,000,000.0		750,000,000.0
Fiscal 2026 Term Loan \| Term Loans \| SOFR
Debt Instrument [Line Items]
Basis spread on variable rate	1.25%
Fiscal 2026 Term Loan \| Term Loans \| SOFR, Step Up \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	1.625%
Fiscal 2026 Term Loan \| Term Loans \| SOFR, Step Up \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	1.375%
Fiscal 2026 Term Loan \| Term Loans \| SOFR, Step Down \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate	1.125%
Fiscal 2026 Term Loan \| Term Loans \| SOFR, Step Down \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate	1.00%
Fiscal 2016 Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Principal amount								$ 500,000,000.0
Interest rate, senior notes								3.40%
Percentage of principal amount at issuance								99.589%
Effective interest rate								3.449%
Fiscal 2016 Senior Notes \| Senior Notes \| Long-term debt, excluding current portion
Debt Instrument [Line Items]
Fair value of fixed-rate notes													494,100,000
Fiscal 2016 Senior Notes \| Senior Notes, Excluding Current Maturities \| Long-term debt, excluding current portion
Debt Instrument [Line Items]
Fair value of fixed-rate notes									498,800,000		498,800,000
Fiscal 2020 Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Principal amount							$ 750,000,000.0
Interest rate, senior notes							2.90%
Percentage of principal amount at issuance							99.717%
Effective interest rate							2.933%
Fair value of fixed-rate notes													702,800,000
Fiscal 2020 Senior Notes \| Senior Notes, Excluding Current Maturities
Debt Instrument [Line Items]
Principal amount									750,000,000.0		750,000,000.0
Fair value of fixed-rate notes									701,900,000		701,900,000
Fiscal 2021 Senior Notes \| Senior Notes
Debt Instrument [Line Items]
Principal amount				$ 1,000,000,000.0
Interest rate, senior notes				2.60%
Percentage of principal amount at issuance				99.957%
Effective interest rate				2.605%
Fiscal 2021 Senior Notes \| Senior Notes \| Long-term debt, excluding current portion
Debt Instrument [Line Items]
Fair value of fixed-rate notes													$ 891,400,000
Fiscal 2021 Senior Notes \| Senior Notes, Excluding Current Maturities
Debt Instrument [Line Items]
Principal amount									1,000,000,000		1,000,000,000
Fair value of fixed-rate notes									890,300,000		890,300,000
Fiscal 2021 Senior Notes \| Senior Notes, Excluding Current Maturities \| Long-term debt, excluding current portion
Debt Instrument [Line Items]
Fair value of fixed-rate notes									$ 890,300,000		$ 890,300,000