Pension And Other Postretirement Benefits (Fair Value Of Benefit Plan Assets - Other Postretirement) (Details) - Other Postretirement Benefits - USD ($) $ in Millions	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	$ 384	$ 364	$ 371
U.S. Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	95	92
Non-U.S. Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	41	36
Corporate Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	58	57
Government Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	185	174
Asset-backed Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	3	3
Cash
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets	2	2
Level 1
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, fair value hierarchy	136	128
Level 1 \| U.S. Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, fair value hierarchy	95	92
Level 1 \| Non-U.S. Equity Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, fair value hierarchy	41	36
Level 2
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, fair value hierarchy	248	236
Level 2 \| Corporate Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, fair value hierarchy	58	57
Level 2 \| Government Debt Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, fair value hierarchy	185	174
Level 2 \| Asset-backed Securities
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, fair value hierarchy	3	3
Level 2 \| Cash
Defined Benefit Plan Disclosure [Line Items]
Fair value of plan assets, fair value hierarchy	$ 2	$ 2