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Restructuring and Related Activities (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Charges | $ 109 | $ 85 | $ 0
Restructuring Reserve, Settled without Cash | (12) | (7) | 0
2023 Restructuring Plan |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Charges | 9 | 85 |
Payments for Restructuring | (26) | (50) |
Restructuring Reserve, Settled without Cash | (4) | (7) |
Restructuring Reserve | $ 7 | 28 | 0
Employee headcount reduction | 15.00% |  |
2024 Restructuring Plan |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Charges | $ 100 |  |
Payments for Restructuring | (44) |  |
Restructuring Reserve, Settled without Cash | (8) |  |
Restructuring Reserve | $ 48 | 0 |
Employee headcount reduction | 10.00% |  |
Employee Severance [Member] | 2023 Restructuring Plan |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Charges | $ 0 | 63 |
Payments for Restructuring | (14) | (46) |
Restructuring Reserve, Settled without Cash | 0 | (1) |
Restructuring Reserve | 2 | 16 | 0
Employee Severance [Member] | 2024 Restructuring Plan |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Charges | 39 |  |
Payments for Restructuring | (34) |  |
Restructuring Reserve, Settled without Cash | (4) |  |
Restructuring Reserve | 9 | 0 |
Facility Closing | 2023 Restructuring Plan |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Charges | 9 | 22 |
Payments for Restructuring | (12) | (4) |
Restructuring Reserve, Settled without Cash | (4) | (6) |
Restructuring Reserve | 5 | 12 | $ 0
Facility Closing | 2024 Restructuring Plan |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Charges | 61 |  |
Payments for Restructuring | (10) |  |
Restructuring Reserve, Settled without Cash | (12) |  |
Restructuring Reserve | 39 | 0 |
Towers [Member] | Restructuring Plans |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Charges | 13 | 44 |
Fiber [Member] | Restructuring Plans |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Charges | 64 | 18 |
Other Operating Segment | Restructuring Plans |  |  |
Restructuring Cost and Reserve [Line Items] |  |  |
Restructuring Charges | $ 32 | $ 23 |

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