Income Taxes (Reconciliation of Beginning and Ending Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Reconciliation of Unrecognized Tax Benefits
Balance at beginning of year	$ 282	$ 1,608	$ 69
Additions based on tax positions related to the current year	21	0	1,548
Additions for tax positions of prior years	304	33	0
Reductions for tax positions related to IRS Agreement	0	(1,343)	0
Reductions for tax positions of prior years	(21)	(16)	(6)
Tax settlements	(1)	0	(3)
Balance at end of year	$ 585	$ 282	$ 1,608