XML 108 R86.htm IDEA: XBRL DOCUMENT v3.22.0.1
Regulatory Matters, Commitments, Contingencies And Environmental Liabilities Regulatory Matters, Commitments, Contingencies And Environemental Liabilities (Environmental Liabilities) (Details)
$ in Millions
Dec. 31, 2021
USD ($)
Dec. 31, 2020
USD ($)
Environmental Remediation Obligations [Abstract]    
Current $ 46 $ 44
Non-current 247 262
Total environmental liabilities $ 293 $ 306
Site Contingency, Number of Sites Needing Remediation 34