Commitments and Contingencies Personal Injury (Details) - Personal Injury - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2026	Mar. 31, 2025
Loss Contingency Accrual [Roll Forward]
Beginning balance	$ 266	$ 265
Accruals / changes in estimates	26	9
Payments	(23)	(35)
Ending balance	269	239
Current portion of ending balance	85	$ 85
Minimum
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss	220
Maximum
Loss Contingencies [Line Items]
Loss contingency, estimate of possible loss	$ 340