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Restructuring Charges - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023	Dec. 31, 2023
Accrued Restructuring Costs
Restructuring charges	$ 33	$ 72	$ 85	$ 189
Employee separation costs
Accrued Restructuring Costs
Restructuring charges			55	93
NextGen Program
Accrued Restructuring Costs
Expected cost	335		335
Restructuring charges	33	72	85	189	$ 229
NextGen Program | Employee separation costs
Accrued Restructuring Costs
Restructuring charges	29	15	55	93
NextGen Program | Facility exit costs
Accrued Restructuring Costs
Restructuring charges	$ 4	$ 55	$ 29	$ 92

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