Noncontrolling Interest - Schedule of Ownership Interest (Details) - Black Rock OpCo	12 Months Ended
	Dec. 31, 2025 shares
Noncontrolling Interest [Line Items]
OpCo Units	49,975,000
Ownership %	100.00%
LLC Units held by Black Rock Coffee Bar, Inc.
Noncontrolling Interest [Line Items]
OpCo Units	17,478,000
Ownership %	35.00%
LLC Units owned by Continuing Equity Owners
Noncontrolling Interest [Line Items]
OpCo Units	32,497,000
Ownership %	65.00%
Common stock units subject to time based requirements (in shares)	80,500