(Fair Values Pension Plan Assets By Asset Class) (Details) - USD ($) $ in Millions	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	$ 8,189	$ 8,836	$ 8,845
Quoted Prices In Active Markets For Identical Assets (Level 1) [Member] | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	952	884
Significant Observable Inputs (Level 2) [Member] | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	4,785	5,185
Significant Unobservable Inputs (Level 3) [Member] | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	16	78	32
Equities
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	1,537	1,336
Equities | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	972	835
Equities | Significant Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	565	501
Equities | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	0	0
Fixed income
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	4,227	4,691
Fixed income | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	0	0
Fixed income | Significant Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	4,220	4,684
Fixed income | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	7	7
Fixed income | Significant Unobservable Inputs (Level 3) [Member] | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	7	7	7
Derivatives
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	9	71
Derivatives | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	0	0
Derivatives | Significant Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	0	0
Derivatives | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	9	71
Derivatives | Significant Unobservable Inputs (Level 3) [Member] | U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	9	71	$ 25
Cash and cash equivalents
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	(20)	49
Cash and cash equivalents | Quoted Prices In Active Markets For Identical Assets (Level 1) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	(20)	49
Cash and cash equivalents | Significant Observable Inputs (Level 2) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	0	0
Cash and cash equivalents | Significant Unobservable Inputs (Level 3) [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	0	0
Hedge funds
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	1,148	1,293
Private equity
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	599	644
Real estate funds
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, plan assets, amount	$ 689	$ 752