Employee Benefit Plans Employee Benefit Plans (Obligations, Funded Status, and Periodic Benefit Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Benefit obligations	$ 9,077	$ 9,498	$ 9,298
Estimated fair value of plan assets	7,836	8,270	8,294
Over (under) funded status	(1,241)	(1,228)
Net periodic benefit costs	317	291	122
Pension Benefits | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Benefit obligations	8,320	8,649
Estimated fair value of plan assets	7,370	7,786
Over (under) funded status	(950)	(863)
Net periodic benefit costs	257	227
Pension Benefits | Non- U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Benefit obligations	757	849
Estimated fair value of plan assets	466	484
Over (under) funded status	(291)	(365)
Net periodic benefit costs	60	64
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Benefit obligations	730	765	794
Estimated fair value of plan assets	1,329	1,334	1,303
Over (under) funded status	599	569
Net periodic benefit costs	(40)	(38)	$ (42)
Other Postretirement Benefits | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Benefit obligations	693	723
Estimated fair value of plan assets	1,302	1,307
Over (under) funded status	609	584
Net periodic benefit costs	(43)	(41)
Other Postretirement Benefits | Non- U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Benefit obligations	37	42
Estimated fair value of plan assets	27	27
Over (under) funded status	(10)	(15)
Net periodic benefit costs	$ 3	$ 3