Revenue Recognition - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023	Dec. 31, 2023	Dec. 31, 2022
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	OPERATING REVENUE	OPERATING REVENUE
Lease revenue	$ 240	$ 257	$ 461	$ 526
Percent of operating revenue	7.00%	7.00%	7.00%	7.00%
Revenue recognized	$ 43	$ 42	$ 343	$ 347
Contract liabilities					$ 698	$ 715
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			50 months
Weighted Average | Business Customers
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Length of customer life			35 months