Commitments and Contingencies (Environmental) (Details) - USD ($) $ in Millions	Jun. 30, 2025	Dec. 31, 2024
Site Contingency [Line Items]
Accruals for environmental remediation, dismantling, and decontamination, undiscounted	$ 11	$ 11
Environmental Loss Contingency, Statement of Financial Position [Extensible Enumeration]	Accrued expenses, Other noncurrent liabilities	Accrued expenses, Other noncurrent liabilities
Former TEL Plant Site Louisiana And Houston Texas Plant Site [Member]
Site Contingency [Line Items]
Accruals for environmental remediation, dismantling, and decontamination	$ 8	$ 9
Accruals for environmental remediation, dismantling, and decontamination, undiscounted	$ 10	$ 11
Minimum [Member] \| Former TEL Plant Site Louisiana And Houston Texas Plant Site [Member]
Site Contingency [Line Items]
Discount rate	3.00%	3.00%
Maximum [Member] \| Former TEL Plant Site Louisiana And Houston Texas Plant Site [Member]
Site Contingency [Line Items]
Discount rate	9.00%	9.00%

Total costs accrued as of the balance sheet date for environmental loss contingencies.

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