Summary of Significant Accounting Policies - Concentration of Suppliers (Details) - BW Ultimate Parent, LLC and Subsidiaries - Supplier Concentration Risk - Product Benchmark - Major Suppliers	3 Months Ended
	Mar. 31, 2026 store company	Mar. 31, 2025 store
Fuel
Accounting Policies [Line Items]
Number of major suppliers \| company	2
Concentration risk percentage	85.00%	89.00%
Merchandise
Accounting Policies [Line Items]
Number of major suppliers \| store	3	3
Concentration risk percentage	56.00%	56.00%

For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.