PREFERRED SHARES REDEEMABLE NON-CONTROLLING INTEREST - Schedule of Preferred Shares (Details) - USD ($) $ in Millions	Mar. 31, 2026	Dec. 31, 2025	Mar. 31, 2025	Dec. 31, 2024
Redeemable Noncontrolling Interest [Line Items]
Preferred shares redeemable non-controlling interest	$ 1,265	$ 1,398	$ 1,930	$ 2,103
Subsidiaries
Redeemable Noncontrolling Interest [Line Items]
Preferred shares redeemable non-controlling interest	$ 1,384	$ 0	$ 0	$ 0
BUSHI Tracking Shares
Redeemable Noncontrolling Interest [Line Items]
Number of Shares	200,000,000	200,000,000
Preferred shares redeemable non-controlling interest	$ 977	$ 1,115
Class B senior preferred
Redeemable Noncontrolling Interest [Line Items]
Number of Shares	1,621,093,000,000	1,621,093,000,000
Preferred shares redeemable non-controlling interest	$ 41	$ 41
Class B preferred
Redeemable Noncontrolling Interest [Line Items]
Number of Shares	2,520,571,000,000	2,520,571,000,000
Preferred shares redeemable non-controlling interest	$ 63	$ 63
Class A preferred
Redeemable Noncontrolling Interest [Line Items]
Number of Shares	5,909,372,000,000	5,909,372,000,000
Preferred shares redeemable non-controlling interest	$ 148	$ 148
BMHL Tracking Shares
Redeemable Noncontrolling Interest [Line Items]
Number of Shares	100,000,000	100,000,000
Preferred shares redeemable non-controlling interest	$ 36	$ 31
Class B-1 and E-1
Redeemable Noncontrolling Interest [Line Items]
Number of Shares	716,533
Class B-1 and E-1 \| Subsidiaries
Redeemable Noncontrolling Interest [Line Items]
Number of Shares	46,471,759,000,000
Preferred shares redeemable non-controlling interest	$ 1,115
Class B-2, Class E-2 and Investor Units \| Subsidiaries
Redeemable Noncontrolling Interest [Line Items]
Number of Shares	10,453,660,000,000
Preferred shares redeemable non-controlling interest	$ 269