Revenue Recognition - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024	Dec. 31, 2024	Dec. 31, 2023
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Operating Lease, Lease Income, Statement of Income or Comprehensive Income [Extensible Enumeration]	OPERATING REVENUE	OPERATING REVENUE
Lease revenue	$ 262	$ 221
Percent of operating revenue	8.00%	7.00%
Revenue recognized	$ 294	$ 300
Contract liabilities			$ 733	$ 698
Minimum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract term	1 year
Maximum
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Contract term	5 years
Weighted Average | Mass Market Customers
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Length of customer life	47 months
Weighted Average | Business Customers
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Length of customer life	34 months