Benefit Plans (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2026	Dec. 31, 2025	Dec. 31, 2024	Dec. 31, 2023
Defined Benefit Plan Disclosure [Line Items]
Amounts charged to expense for defined contribution plans		$ 110	$ 112	$ 109
Pension [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated benefit obligation		6,100	5,900
Accumulated benefit obligation		159	140
Projected benefit obligation		177	161
Defined benefit plan, pension plan with projected benefit obligation in excess of plan assets, plan assets		$ 0	$ 0
Defined benefit plan, assumptions used calculating net periodic benefit cost, expected long-term rate of return on plan assets		6.10%	6.10%	6.10%
Pension [Member] | Forecast [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, assumptions used calculating net periodic benefit cost, expected long-term rate of return on plan assets	6.10%
Pension [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected future employer contributions		$ 60
Pension [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation percentage		10.00%
Pension [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation percentage		90.00%
Postretirement Benefit Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, assumptions used calculating net periodic benefit cost, expected long-term rate of return on plan assets		7.40%	7.40%	7.40%
Postretirement Benefit Plan [Member] | Forecast [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, assumptions used calculating net periodic benefit cost, expected long-term rate of return on plan assets	7.40%
Postretirement Benefit Plan [Member] | Maximum [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected future employer contributions		$ 100
Postretirement Benefit Plan [Member] | Equity Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation percentage		55.00%
Postretirement Benefit Plan [Member] | Fixed Income Securities [Member]
Defined Benefit Plan Disclosure [Line Items]
Plan assets, target allocation percentage		45.00%