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Condensed Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Statement of Comprehensive Income [Abstract]
Unrealized loss on certain investments, tax					$ 0	$ 0	$ 0
Unrealized gain/(loss) arising during period, tax	$ 3	$ 12	$ 22	$ 7	11	12	16
Reclassification adjustment for (gain)/loss included in net earnings, tax	(6)	0	(8)	1	1	3	2
Net actuarial gain/(loss) arising during the period, tax	0	0	17	2	13	(22)	(32)
Amortization of actuarial loss included in net periodic pension cost, tax	(8)	1	(20)	1	0	(11)	(8)
Settlements included in net (loss)/income, tax					0	0	2
Amortization of prior service credits included in net periodic pension cost, tax	8	6	20	12	1	2	1
Prior service cost/(credit) arising during the period, tax					0	0	0
Pension and postretirement (cost)/benefit related to our equity method investments, tax	$ 0	$ 0	$ (3)	$ 0	$ 0	$ 0	$ 2

X

- Definition

Tax portion of the income statement impact of setllements and curtailments recognized as a component of net periodic benefit cost.

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Tax portion of pension and postretirement benefit costs recognized in net income related to equity method investments.

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Amount of tax expense (benefit) for (increase) decrease in value of benefit obligation for change in actuarial assumptions and increase (decrease) in value of plan assets from experience different from that assumed of defined benefit plan, that has not been recognized in net periodic benefit (cost) credit.

+ References

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Amount of tax (expense) benefit of reclassification adjustment from accumulated other comprehensive (income) loss for prior service cost (credit) of defined benefit plan.

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Amount, before reclassification, of tax expense (benefit) for gain (loss) from derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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Amount of tax expense (benefit) for reclassification of gain (loss) from accumulated other comprehensive income (AOCI) for derivative instrument designated and qualifying as cash flow hedge included in assessment of hedge effectiveness.

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Amount of tax (expense) benefit for cost (credit) of benefit change attributable to participants' prior service from plan amendment or plan initiation of defined benefit plan, that has not been recognized in net periodic benefit cost (credit).

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Amount of tax expense (benefit) of reclassification adjustment from accumulated other comprehensive income (loss) for gain (loss) of defined benefit plan.

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Amount, before adjustment, of tax expense (benefit) for unrealized holding gain (loss) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale). Excludes tax expense (benefit) for unrealized gain (loss) on investment in debt security measured at amortized cost (held-to-maturity) from transfer to available-for-sale.

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