Accumulated Other Comprehensive Loss - Reclassifications (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income (expense), net	$ (334)	$ 113	$ (32)
Net loss (gain) on sale of businesses	17	121	(113)
Total before tax	230	10,237	991
Income tax (benefit) expense	(175)	61	557
Net of tax	55	10,298	$ 1,548
Decrease (Increase) in Net Income/Loss | Defined benefit plans
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Total before tax	76	67
Income tax (benefit) expense	(19)	(16)
Net of tax	57	51
Decrease (Increase) in Net Income/Loss | Net actuarial loss
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income (expense), net	91	82
Assets held for sale		(24)
Net loss (gain) on sale of businesses		(2)
Net loss (gain) on sale of businesses, including held for sale		(22)
Decrease (Increase) in Net Income/Loss | Prior service cost
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other income (expense), net	$ (15)	(15)
Decrease (Increase) in Net Income/Loss | Foreign currency adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Assets held for sale		389
Net loss (gain) on sale of businesses		(7)
Net loss (gain) on sale of businesses, including held for sale		382
Decrease (Increase) in Net Income/Loss | Defined benefit plans and foreign currency adjustment
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income tax (benefit) expense		0
Net of tax		$ 360