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Summary of Significant Accounting Policies - (Schedule of Components of Investments) (Details) - USD ($) $ in Millions | Sep. 30, 2023 | Dec. 31, 2022
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Summary Of Significant Accounting Policies [Line Items] |  |
Total Investments | $ 671 | $ 440
Catalyst [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Total Investments | $ 317 | 339
Percentage Of Interest In Investments | 50.00% |
Water JV [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Total Investments | $ 214 |
Percentage Of Interest In Investments | 30.00% |
Matterhorn [Member] |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Total Investments | $ 90 | 54
Percentage Of Interest In Investments | 12.50% |
Other Member |  |
Summary Of Significant Accounting Policies [Line Items] |  |
Total Investments | $ 50 | $ 47

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- Definition Sum of the carrying amounts as of the balance sheet date of all investments. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 944 -SubTopic 210 -Name Accounting Standards Codification -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(a)(1)(h)) -Publisher FASB -URI https://asc.fasb.org//1943274/2147479440/944-210-S99-1 + Details
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