Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024
Statement of Financial Position [Abstract]
Restricted cash and equivalents, in default funds and margin deposits	$ 3,120	$ 4,383
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	900,000,000	900,000,000
Common stock, shares issued (in shares)	594,620,320	598,920,378
Common stock, shares outstanding (in shares)	569,894,024	575,062,217
Common stock in treasury (in shares)	24,726,296	23,858,161