Non-controlling Interests - Narrative (Details)	6 Months Ended
Jun. 30, 2025 shares
Common Class B
Noncontrolling Interest [Line Items]
Shares acquired (in shares)	47,049,478
RSU
Noncontrolling Interest [Line Items]
Vested (in shares)	989,098

Share-Based Compensation Arrangement by Share-Based Payment Award, Equity Instruments Other than Options, Net Vested In Period

No definition available.

Name:	uwmc_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNetVestedInPeriod
Namespace Prefix:	uwmc_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration