XML 66 R53.htm IDEA: XBRL DOCUMENT
v3.20.2

Stock Based Compensation (Details) - Certain Senior Executives - Performance-based equity - 2005 Plan - USD ($) | 3 Months Ended
--- | ---
Sep. 30, 2020 | Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |
Reversal of compensation expense |  | $ 2,900,000
Compensation expense | $ 0 |

X
- Definition Allocated Share-based Compensation Expense, Cumulative Adjustment + References No definition available. + Details
Name: | ua_AllocatedShareBasedCompensationExpenseCumulativeAdjustment
Namespace Prefix: | ua_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

X
- Definition Amount of expense recognized from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments), awarded to key employees or individuals. Excludes amount related to plans that cover generally all employees (for example, but not limited to, qualified pension plans). + References No definition available. + Details
Name: | us-gaap_DeferredCompensationArrangementWithIndividualAllocatedShareBasedCompensationExpense
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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
- Details
Name: | srt_TitleOfIndividualAxis=ua_CertainExecutivesAndKeyEmployeesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

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