Employee Benefit Plans Employee Benefit Plans (Obligations, Funded Status, and Periodic Benefit Costs) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Benefit obligations	$ 9,298	$ 12,182	$ 12,873
Estimated fair value of plan assets	8,294	10,971	11,256
Over (under) funded status	(1,004)	(1,211)
Net periodic benefit costs	122	194	246
Pension Benefits | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Benefit obligations	8,425	11,086
Estimated fair value of plan assets	7,831	10,392
Over (under) funded status	(594)	(694)
Net periodic benefit costs	49	97
Pension Benefits | Non- U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Benefit obligations	873	1,096
Estimated fair value of plan assets	463	579
Over (under) funded status	(410)	(517)
Net periodic benefit costs	73	97
Other Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Benefit obligations	794	1,138	1,252
Estimated fair value of plan assets	1,303	1,443	1,492
Over (under) funded status	509	305
Net periodic benefit costs	(42)	(53)	$ (92)
Other Postretirement Benefits | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Benefit obligations	758	1,099
Estimated fair value of plan assets	1,277	1,417
Over (under) funded status	519	318
Net periodic benefit costs	(43)	(55)
Other Postretirement Benefits | Non- U.S. Plans
Defined Benefit Plan Disclosure [Line Items]
Benefit obligations	36	39
Estimated fair value of plan assets	26	26
Over (under) funded status	(10)	(13)
Net periodic benefit costs	$ 1	$ 2