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Supplemental Cash Flow information - Reconciliation of Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents (Details) - USD ($)
$ in Millions
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Dec. 31, 2021
Supplemental Cash Flow Elements [Abstract]        
Cash and cash equivalents $ 713 $ 1,203 $ 1,102  
Restricted cash and restricted cash equivalents [1] 50 604 202  
Cash, cash equivalents, restricted cash and restricted cash equivalents $ 763 $ 1,807 $ 1,304 $ 1,551
[1] At December 31, 2024, the restricted cash and restricted cash equivalent balance includes $50 of cash and cash equivalents deposited in an escrow account as per the terms of the MOU, which is classified as a noncurrent asset. At December 31, 2023, the restricted cash and restricted cash equivalents 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, which was classified as a current asset. At December 31, 2022, the restricted cash and restricted cash equivalents balance includes cash and cash equivalents deposited in an escrow account as per the terms of the MOU, which was classified as a noncurrent asset. See “Note 22 – Commitments and Contingent Liabilities” for further details.