Restructuring Charges - Summary of Restructuring Charges (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	Dec. 31, 2022
Accrued Restructuring Costs
Restructuring charges	$ 117	$ 0	$ 117	$ 0	$ 0
NextGen Program
Accrued Restructuring Costs
Restructuring charges	117		117
Employee separation costs
Accrued Restructuring Costs
Restructuring charges			78
Employee separation costs | NextGen Program
Accrued Restructuring Costs
Restructuring charges	78		78
Facility exit costs | NextGen Program
Accrued Restructuring Costs
Restructuring charges	37		37
Lease restructuring	26		26
Accelerated depreciation	10		10
Impairment of long-lived assets	1		1
Third party and other costs | NextGen Program
Accrued Restructuring Costs
Restructuring charges	$ 2		$ 2