Changes in Accumulated Other Comprehensive Loss (Tables)

6 Months Ended

Jun. 30, 2024

Other Comprehensive Income (Loss), Net of Tax [Abstract]

Schedule of Changes In Accumulated Other Comprehensive Income (Loss) by Component

The following table presents the changes in accumulated other comprehensive loss by component for the six months ended June 30, 2024 and 2023 (in millions):

	Accumulated Other Comprehensive Loss for the Six Months Ended June 30, 2024								Accumulated Other Comprehensive Loss for the Six Months Ended June 30, 2023
	Changes related to cash flow derivative hedges		Changes in defined benefit plans		Foreign currency translation adjustments		Accumulated other comprehensive loss		Changes related to cash flow derivative hedges		Changes in defined benefit plans		Foreign currency translation adjustments		Accumulated other comprehensive loss
Accumulated comprehensive loss at beginning of the year	$	(666)	$	(2)	$	(6)	$	(674)	$	(638)	$	(8)	$	3	$	(643)
Other comprehensive income (loss) before reclassifications	42		(3)		10		49		(42)		—		(10)		(52)
Amounts reclassified from accumulated other comprehensive loss	(29)		—		—		(29)		15		—		—		15
Net current-period other comprehensive income (loss)	13		(3)		10		20		(27)		—		(10)		(37)
Ending balance	$	(653)	$	(5)	$	4	$	(654)	$	(665)	$	(8)	$	(7)	$	(680)

Schedule of Reclassifications Out of Accumulated Other Comprehensive Income (Loss)

The following table presents reclassifications out of accumulated other comprehensive loss for the quarters and six months ended June 30, 2024 and 2023 (in millions):

	Amount of Gain (Loss) Reclassified from Accumulated Other Comprehensive Loss into Income
Details About Accumulated Other Comprehensive Loss Components	Quarter Ended June 30, 2024		Quarter Ended June 30, 2023		Six Months Ended June 30, 2024		Six Months Ended June 30, 2023		Affected Line Item in Statements of Comprehensive Income (Loss)
Gain (loss) on cash flow derivative hedges:
Interest rate swaps	$	12	$	10	$	25	$	20	Interest expense, net of interest capitalized
Foreign currency forward contracts	(6)		(4)		(11)		(9)		Depreciation and amortization expenses
Foreign currency forward contracts	—		(10)		—		(10)		Other (expense) income
Fuel swaps	—		—		—		—		Other (expense) income
Fuel swaps	11		(12)		15		(16)		Fuel
	$	17	$	(16)	$	29	$	(15)