Employee Benefits - Pension Benefits (Details) - Affiliated Entity - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024
Pension Plan
Employee Benefits
Employer contributions to benefit plan	$ 0	$ 170
Unfunded status	588	645
Post-Retirement Benefit Plan
Employee Benefits
Unfunded status	$ 1,700	$ 1,700