Pension and Other Postretirement Employee Benefit Plans (Components of Net Periodic Pension and Postretirement Benefit (Cost)) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Pension Benefits | U.S. Pension Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	$ 0	$ 0
Interest cost	(97)	(54)
Expected return on plan assets	124	130
Amortization of prior service (cost) credit	(1)	(1)
Amortization of net (loss) gain	(12)	(35)
Curtailment and settlement gains (losses) recognized	0	0
Net periodic pension benefit (cost)	14	40
Pension Benefits | Foreign Plan
Defined Benefit Plan Disclosure [Line Items]
Service cost	(30)	(35)
Interest cost	(46)	(22)
Expected return on plan assets	33	35
Amortization of prior service (cost) credit	1	1
Amortization of net (loss) gain	7	(1)
Curtailment and settlement gains (losses) recognized	1	(7)
Net periodic pension benefit (cost)	(34)	(29)
Postretirement Benefits
Defined Benefit Plan Disclosure [Line Items]
Service cost	0	0
Interest cost	(5)	(3)
Expected return on plan assets	0	0
Amortization of prior service (cost) credit	2	2
Amortization of net (loss) gain	0	(1)
Curtailment and settlement gains (losses) recognized	0	0
Net periodic pension benefit (cost)	$ (3)	$ (2)