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Supplemental Cash Flow information - Reconciliation of Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents (Details) - USD ($)
$ in Millions
Mar. 31, 2024
Dec. 31, 2023
Mar. 31, 2023
Dec. 31, 2022
Supplemental Cash Flow Elements [Abstract]        
Cash and cash equivalents $ 746 $ 1,203    
Restricted cash and restricted cash equivalents [1] 607 604    
Cash, cash equivalents, restricted cash and restricted cash equivalents $ 1,353 $ 1,807 $ 1,021 $ 1,304
[1] Restricted cash and restricted cash equivalent balance includes cash and cash equivalents deposited in the Water District Settlement Fund related to the U.S. Public Water System Class Action Suit Settlement and is classified as a current asset (see “Note 16 – Commitments and Contingent Liabilities”).