Accumulated Other Comprehensive Loss - Reclassifications (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Reclassifications out of accumulated other comprehensive income loss by component
Other income (expense), net	$ (73)	$ 40
Total before tax	(102)	(680)
Income tax expense	45	169
Net income	(57)	(511)
Decrease (Increase) in Net Income | Net actuarial loss
Reclassifications out of accumulated other comprehensive income loss by component
Other income (expense), net	24	20
Decrease (Increase) in Net Income | Prior Service Cost
Reclassifications out of accumulated other comprehensive income loss by component
Other income (expense), net	(4)	(4)
Decrease (Increase) in Net Income | Defined Benefit Plan
Reclassifications out of accumulated other comprehensive income loss by component
Total before tax	20	16
Income tax expense	(5)	(4)
Net income	$ 15	$ 12