v3.26.1
Benefit Plans (Narrative) (Details)
 3 Months Ended
Mar. 31, 2026
USD ($)
Pension [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Amounts charged to expense for defined contribution plans $ 4,000,000
Pension [Member] | Maximum [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Expected future employer contributions 56,000,000
Postretirement Benefit Plan [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Amounts charged to expense for defined contribution plans 0
Postretirement Benefit Plan [Member] | Maximum [Member]  
Defined Benefit Plan Disclosure [Line Items]  
Expected future employer contributions $ 100,000,000