Nonoperating Income (Expense) (Schedule of Nonoperating Income (Expense)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Other Income and Expenses [Abstract]
Other components of net periodic benefit costs	$ 6	$ 1	$ 7
Realized investment gains (losses)	(140)	156	89
Unrealized investment gains (losses)	(108)	(213)	(271)
Total investment gains (losses)	(248)	(57)	(182)
Gain on sale of product line	9	0	0
Gain on sale of facility	11	0	0
Total other income (expense), net	$ (222)	$ (56)	$ (175)