v3.19.2

Contractual Commitments, Contingencies, and Off-Balance Sheet Arrangements - Contractual Obligations (Details) - USD ($) $ in Millions | 12 Months Ended
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Jun. 30, 2019 | Jun. 30, 2018 | Jun. 30, 2017
Commitments and Contingencies Disclosure [Abstract] |  |  |
Data center expenses | $ 106.1 | $ 107.5 | $ 104.8
Facilities and equipment leases | 49.0 | 50.4 | 50.3
Software license agreements | 37.3 | 33.7 | 32.0
Software/hardware maintenance agreements | 65.0 | 63.5 | 63.2
Total expenses | $ 257.4 | $ 255.0 | $ 250.3

X
- Definition Software License Expense + References No definition available. + Details
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Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Software and Hardware Maintenance Expense + References No definition available. + Details
Name: | br_SoftwareandHardwareMaintenanceExpense
Namespace Prefix: | br_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- References No definition available. + Details
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Balance Type: | na
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- Definition The aggregate amount of communications, data processing and occupancy expenses. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.6) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04.14) -URI http://asc.fasb.org/extlink&oid=116637391&loc=SL114874048-224260 + Details
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- Definition The amount of expenses incurred in the period for information technology and data processing products and services. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.6) -URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227 + Details
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Balance Type: | debit
Period Type: | duration

X
- Definition Amount of rent expense incurred for leased assets, including but not limited to, furniture and equipment, that is not directly or indirectly associated with the manufacture, sale or creation of a product or product line. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration