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Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($)
$ in Millions
12 Months Ended
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
Statement of Comprehensive Income [Abstract]      
Unrealized gain/(loss) on certain investments, tax $ 0 $ 0 $ 0
Unrealized (loss)/gain arising during period, tax 0 (11) 12
Reclassification adjustment for loss/(gain) included in net loss, tax 0 1 (3)
Net actuarial (loss)/gain arising during the period, tax (1) 13 (22)
Amortization of actuarial loss/(gain) included in net periodic pension cost, tax 0 0 (11)
Settlement gain included in net periodic cost, tax 0 0 0
Amortization of prior service credits included in net periodic pension cost, tax 0 1 2
Prior service credits arising during the period, tax 0 0 0
Pension and postretirement benefit/(cost) related to our equity method investments, tax $ 0 $ 0 $ 0