v3.19.2

Stock-Based Compensation - Summary of Exercisable Stock Options (Details) $ / shares in Units, $ in Millions | 12 Months Ended
--- | ---
Jun. 30, 2019 USD ($) $ / shares shares
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Aggregate intrinsic value | $ | $ 195.8
Exercisable Options |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Options exercisable (in shares) | shares | 2,387,680
Weighted average remaining contractual life | 5 years 2 months 1 day
Weighted average exercise price (in dollars per share) | $ 45.68
Exercisable Options | $0.01 to $35.00 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise price range, minimum | 0.01
Exercise price range, maximum | $ 35
Options exercisable (in shares) | shares | 607,688
Weighted average remaining contractual life | 2 years 10 months 24 days
Weighted average exercise price (in dollars per share) | $ 23.08
Exercisable Options | $35.01 to $50.00 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise price range, minimum | 35.01
Exercise price range, maximum | $ 50
Options exercisable (in shares) | shares | 580,519
Weighted average remaining contractual life | 4 years 6 months 3 days
Weighted average exercise price (in dollars per share) | $ 37.56
Exercisable Options | $50.01 to $65.00 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise price range, minimum | 50.01
Exercise price range, maximum | $ 65
Options exercisable (in shares) | shares | 808,864
Weighted average remaining contractual life | 6 years 3 days
Weighted average exercise price (in dollars per share) | $ 52.48
Exercisable Options | $65.01 to $80.00 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise price range, minimum | 65.01
Exercise price range, maximum | $ 80
Options exercisable (in shares) | shares | 225,463
Weighted average remaining contractual life | 7 years 6 months 10 days
Weighted average exercise price (in dollars per share) | $ 67.32
Exercisable Options | $80.01 to $95.00 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise price range, minimum | 80.01
Exercise price range, maximum | $ 95
Options exercisable (in shares) | shares | 141,699
Weighted average remaining contractual life | 8 years 3 months 29 days
Weighted average exercise price (in dollars per share) | $ 92.46
Exercisable Options | $95.01 - $110.00 |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |
Exercise price range, minimum | 95.01
Exercise price range, maximum | $ 110
Options exercisable (in shares) | shares | 23,447
Weighted average remaining contractual life | 9 years 4 months 13 days
Weighted average exercise price (in dollars per share) | $ 107.52

X
- 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 No definition available. + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(1)(iii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisableWeightedAverageExercisePrice
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | instant

X
- Definition The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeLowerRangeLimit
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (c)(iii) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeNumberOfExercisableOptions
Namespace Prefix: | us-gaap_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | instant

X
- Definition The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (g) -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_ShareBasedCompensationSharesAuthorizedUnderStockOptionPlansExercisePriceRangeUpperRangeLimit
Namespace Prefix: | us-gaap_
Data Type: | num:perShareItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableIntrinsicValue1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Definition Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=116856206&loc=d3e5070-113901 + Details
Name: | us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardOptionsExercisableWeightedAverageRemainingContractualTerm1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_AwardTypeAxis=br_ExercisableOptionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=br_ExercisePriceRangeRangeTwoMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=br_ExercisePriceRangeRangeThreeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=br_ExercisePriceRangeRangeFourMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=br_ExercisePriceRangeRangeFiveMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=br_ExercisePriceRangeRangeSixMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PlanNameAxis=br_ExercisePriceRangeSevenMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |