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Restructuring and Related Activities (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Jun. 30, 2024	Dec. 31, 2023
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 11	$ 0
Towers [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	2
Fiber [Member]
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	3
Other Segments
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	6
Forecast
Restructuring Cost and Reserve [Line Items]
Restructuring and Related Cost, Expected Cost Remaining			$ 2
The Plan
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	11
Payments for Restructuring	(12)
Restructuring Reserve, Settled without Cash	(4)
Restructuring Reserve	23			$ 28
Employee Severance
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	0
Payments for Restructuring	(8)
Restructuring Reserve, Settled without Cash	0
Restructuring Reserve	8			16
Facility Closing
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	11
Payments for Restructuring	(4)
Restructuring Reserve, Settled without Cash	(4)
Restructuring Reserve	15			$ 12
Accelerated depreciation and asset write downs
Restructuring Cost and Reserve [Line Items]
Restructuring Reserve, Settled without Cash	(4)
Remaining obligations under facility leases
Restructuring Cost and Reserve [Line Items]
Restructuring Charges	$ 7

X

- Definition

Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation.

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Amount of expenses associated with exit or disposal activities pursuant to an authorized plan. Excludes expenses related to a discontinued operation or an asset retirement obligation.

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Carrying amount (including both current and noncurrent portions of the accrual) as of the balance sheet date pertaining to a specified type of cost associated with exit from or disposal of business activities or restructuring pursuant to a duly authorized plan.

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