Geographic and Customer Concentrations - Revenue from Geographical Region (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Disaggregation of Revenue [Line Items]
Total operating revenue	$ 6,496	$ 7,037	$ 7,493
North America
Disaggregation of Revenue [Line Items]
Total operating revenue	6,331	6,345	6,256
Europe, Middle East and Africa
Disaggregation of Revenue [Line Items]
Total operating revenue	118	628	734
Latin America
Disaggregation of Revenue [Line Items]
Total operating revenue	$ 47	$ 64	$ 503