Planned Divestiture of the Mass Markets Fiber-to-the-Home Business - Principal Components of Held for Sale Assets and Liabilities of Disposal Group (Details) - Held for sale - Mass Markets Fiber-to-the Home Business $ in Millions	Jun. 30, 2025 USD ($)
Assets held for sale
Accounts receivable, less allowance of $1	$ 14
Other current assets, net	15
Property, plant and equipment, net of accumulated depreciation of $819	2,275
Goodwill	1,336
Other assets, net	28
Total assets held for sale	3,668
Liabilities held for sale
Accounts payable	75
Other current liabilities	3
Current portion of deferred revenue	31
Other non-current liabilities	1
Total liabilities held for sale	110
Allowance for doubtful accounts	1
Accumulated depreciation	$ 819