Commitments and Contingencies Environmental (Details) - Environmental Issue $ in Millions	6 Months Ended
	Jun. 30, 2023 USD ($) site	Jun. 30, 2022 USD ($)
Loss Contingencies [Line Items]
Number of alleged environmental contamination sites | site	185
Accrual for Environmental Loss Contingencies [Roll Forward]
Beginning balance	$ 247	$ 251
Accruals / changes in estimates	1	2
Payments	(9)	(9)
Ending balance	239	244
Current portion of ending balance	35	$ 35
Minimum
Loss Contingencies [Line Items]
Possible future costs to settle claims and associated liability	200
Maximum
Loss Contingencies [Line Items]
Possible future costs to settle claims and associated liability	$ 310