Redeemable Noncontrolling Interest	9 Months Ended
Jun. 30, 2026
Noncontrolling Interest [Abstract]
Redeemable Noncontrolling Interest	Redeemable Noncontrolling Interest As of June 30, 2026, the redeemable noncontrolling interests (“RNCI”) consist of interests in Beethoven, a consolidated subsidiary. The Company consolidates Beethoven based on its controlling financial interest of the joint venture through the Company's majority representation on the board. BainCo, the noncontrolling interest holder in Beethoven, has a 50% ownership share and is entitled to receive 50% of the required quarterly distributions made by the joint venture from available cash. For distributions resulting from a liquidity event, including the sale of the joint venture, an initial public offering, or other liquidity event as defined in the Master Operations and Economics Agreement, the noncontrolling interest holder is entitled to proceeds from such event until its contributed capital is returned with an annualized return of 8%, subject to certain adjustments, after which the Company will receive distributions for an equal amount, with any additional amounts distributed equally. Beginning on the sixth anniversary of formation, the noncontrolling interest holder has an exit right, that upon providing notice, the Company has the option to acquire the noncontrolling interest holder’s interest for a price negotiated with the noncontrolling interest holder or otherwise determined by an independent fair market valuation, subject to certain adjustments, if elected. If not acquired by the Company, the noncontrolling interest holder can initiate and complete a sale of Beethoven or an initial public offering that includes the interests held by the Company. Beginning on the eighth anniversary, the Company will also have a similar exit right, that provides similar rights to negotiate the sale of the Company’s interests to the noncontrolling interest holder. Given the exit rights held by the noncontrolling interest holder may result in the interests being redeemed by the Company based on events that are not solely in its control, the noncontrolling interest is presented in the Consolidated Balance Sheets at the greater of the current estimated redemption value or carrying value of the interests including adjustments for the attribution of income to the noncontrolling interest holder. The Company adjusts the redeemable noncontrolling interest to the greater of the current estimated redemption value or carrying value at the end of each reporting period, with changes recognized as adjustments to retained earnings. During the three and nine months ended June 30, 2026, redeemable noncontrolling interests included capital contributions of $1 million and $135 million, and net loss attributions of $4 million and $5 million, respectively. Following loss allocations, the interest was remeasured to its estimated redemption value as of June 30, 2026, resulting in a $3 million net increase to redeemable noncontrolling interest. This remeasurement resulted in expense recognized of $1 million in Other income (expense), net and an adjustment of $2 million to additional paid-in capital. As of June 30, 2026, the carrying value was $133 million. In the second quarter of fiscal year 2026, the Company sold recorded music catalog rights to Beethoven for consideration of $233 million, receiving $182 million of cash in return, net of the Company’s portion of contributions to the joint venture for the acquisition. Given the Company consolidates Beethoven, no gain was recognized, and the cash received is recognized as contributions from redeemable noncontrolling interest holder and issuance of debt under the Beethoven Credit Facility.

As of June 30, 2026, the redeemable noncontrolling interests (“RNCI”) consist of interests in Beethoven, a consolidated subsidiary. The Company consolidates Beethoven based on its controlling financial interest of the joint venture through the Company's majority representation on the board. BainCo, the noncontrolling interest holder in Beethoven, has a 50% ownership share and is entitled to receive 50% of the required quarterly distributions made by the joint venture from available cash. For distributions resulting from a liquidity event, including the sale of the joint venture, an initial public offering, or other liquidity event as defined in the Master Operations and Economics Agreement, the noncontrolling interest holder is entitled to proceeds from such event until its contributed capital is returned with an annualized return of 8%, subject to certain adjustments, after which the Company will receive distributions for an equal amount, with any additional amounts distributed equally.

Beginning on the sixth anniversary of formation, the noncontrolling interest holder has an exit right, that upon providing notice, the Company has the option to acquire the noncontrolling interest holder’s interest for a price negotiated with the noncontrolling interest holder or otherwise determined by an independent fair market valuation, subject to certain adjustments, if elected. If not acquired by the Company, the noncontrolling interest holder can initiate and complete a sale of Beethoven or an initial public offering that includes the interests held by the Company. Beginning on the eighth anniversary, the Company will also have a similar exit right, that provides similar rights to negotiate the sale of the Company’s interests to the noncontrolling interest holder.

Given the exit rights held by the noncontrolling interest holder may result in the interests being redeemed by the Company based on events that are not solely in its control, the noncontrolling interest is presented in the Consolidated Balance Sheets at the greater of the current estimated redemption value or carrying value of the interests including adjustments for the attribution of income to the noncontrolling interest holder. The Company adjusts the redeemable noncontrolling interest to the greater of the current estimated redemption value or carrying value at the end of each reporting period, with changes recognized as adjustments to retained earnings.

During the three and nine months ended June 30, 2026, redeemable noncontrolling interests included capital contributions of $1 million and $135 million, and net loss attributions of $4 million and $5 million, respectively. Following loss allocations, the interest was remeasured to its estimated redemption value as of June 30, 2026, resulting in a $3 million net increase to redeemable noncontrolling interest. This remeasurement resulted in expense recognized of $1 million in Other income (expense), net and an adjustment of $2 million to additional paid-in capital. As of June 30, 2026, the carrying value was $133 million.

In the second quarter of fiscal year 2026, the Company sold recorded music catalog rights to Beethoven for consideration of $233 million, receiving $182 million of cash in return, net of the Company’s portion of contributions to the joint venture for the acquisition. Given the Company consolidates Beethoven, no gain was recognized, and the cash received is recognized as contributions from redeemable noncontrolling interest holder and issuance of debt under the Beethoven Credit Facility.