Significant Accounting Policies (Notes)	6 Months Ended
Significant Accounting Policies (Notes)	Jun. 30, 2026
Accounting Policies [Abstract]
Significant Accounting Policies	Significant Accounting Policies Repurchases of Class A Common Stock The Company accounts for repurchases of its Class A common stock using the constructive retirement method. Shares repurchased are retired immediately upon repurchase and are returned to the status of authorized but unissued shares. Any excess of the repurchase cost over par value is recorded as a reduction to accumulated deficit. No treasury stock is carried on the condensed consolidated balance sheets. In connection with each repurchase of a share of Class A common stock, a corresponding LLC Unit of Baldwin Holdings held by the Company and a corresponding share of Class B common stock are cancelled, which results in a reduction to noncontrolling interest. Tax Receivable Agreement Baldwin is a party to the Tax Receivable Agreement with Baldwin Holdings’ LLC Members that provides for the payment by Baldwin to Baldwin Holdings’ LLC Members of 85% of the amount of cash savings, if any, in U.S. federal, state and local income tax or franchise tax that Baldwin actually realizes as a result of (i) any increase in tax basis in Baldwin Holdings’ assets resulting from (a) previous acquisitions by Baldwin of LLC Units from Baldwin Holdings’ LLC Members, (b) the acquisition of LLC Units from Baldwin Holdings’ LLC Members using the net proceeds from any future offering, (c) redemptions or exchanges by Baldwin Holdings’ LLC Members of LLC Units and the corresponding number of shares of Class B common stock for shares of Class A common stock or cash or (d) payments under the Tax Receivable Agreement, and (ii) tax benefits related to imputed interest resulting from payments made under the Tax Receivable Agreement. This payment obligation is an obligation of Baldwin and not of Baldwin Holdings. For purposes of the Tax Receivable Agreement, the cash tax savings in income tax will be computed by comparing the actual income tax liability of Baldwin (calculated with certain assumptions) to the amount of such taxes that Baldwin would have been required to pay had there been no increase to the tax basis of the assets of Baldwin Holdings as a result of the redemptions or exchanges and had Baldwin not entered into the Tax Receivable Agreement. The Company accounts for amounts payable under the Tax Receivable Agreement in accordance with ASC Topic 450, Contingencies (“Topic 450”). Estimating the amount of payments that may be made under the Tax Receivable Agreement is by its nature imprecise, insofar as the calculation of amounts payable depends on a variety of factors. The actual increase in tax basis, as well as the amount and timing of any payments under the Tax Receivable Agreement, will vary depending upon a number of factors, including the timing of redemptions or exchanges, the price of shares of our Class A common stock at the time of the redemption or exchange, the extent to which such redemptions or exchanges are taxable and the amount and timing of our income. Any such changes in these factors or changes in the Company’s determination of the need for a valuation allowance related to the tax benefits acquired under the Tax Receivable Agreement, including changes in the expected realization of tax benefits, which may be informed by, but not solely determined by, valuation allowance assessments, could adjust the Tax Receivable Agreement liabilities recognized on the condensed consolidated balance sheets. The Company accounts for the effects of these increases in tax basis and associated payments under the Tax Receivable Agreement arising from future redemptions or exchanges as follows: •records an increase in deferred tax assets through additional paid-in capital for the estimated income tax effects of the increases in tax basis based on enacted federal and state tax rates at the date of the redemption or exchange; •to the extent it is estimated that the Company will not realize the full benefit represented by the deferred tax asset, based on an analysis that will consider, among other things, our expectation of future earnings, the Company reduces the deferred tax asset with a valuation allowance, also recorded to additional paid-in capital; and •records 85% of the estimated realizable tax benefit as defined in the Tax Receivable Agreement as an increase to the liability due under the Tax Receivable Agreement, with the offset to additional paid-in capital. Subsequent changes to the initial establishment of the increases in deferred tax assets and Tax Receivable Agreement liability between reporting periods will be recognized in the condensed consolidated statements of stockholders’ equity and mezzanine equity as the exchanges represent transactions among stockholders. Subsequent changes in any of our estimates after the date of the redemption or exchange, as well as any interest accrued on the Tax Receivable Agreement between the Company’s annual tax filing date and the Tax Receivable Agreement payment date, are recognized in the condensed consolidated statements of comprehensive income (loss). In the unlikely event of an early termination of the Tax Receivable Agreement, the Company is required to pay to each holder of the Tax Receivable Agreement an early termination payment equal to the discounted present value of all unpaid Tax Receivable Agreement payments.