Fresh Start Accounting (Fresh Start - Summary Of Components Of Property And Equipment, Net And Fair Value) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021	Apr. 30, 2021
Property, plant and equipment	$ 13,186	$ 9,707
Less: Accumulated depreciation	(1,336)	(508)
Property, plant and equipment, net	$ 11,850	$ 9,199
Fresh Start Adjustments [Member]
Land			$ 40
Buildings and leasehold improvements			(958)
General support			(1,462)
Central office/electronic circuit equipment			(7,364)
Poles			(843)
Cable, fiber, and wire			(8,755)
Conduit			(282)
Construction work in progress			18
Property, plant and equipment			(19,606)
Less: Accumulated depreciation			15,133
Property, plant and equipment, net			(4,473)
Predecessor [Member]
Land			209
Buildings and leasehold improvements			2,134
General support			1,635
Central office/electronic circuit equipment			8,333
Poles			1,359
Cable, fiber, and wire			11,824
Conduit			1,611
Construction work in progress			1,048
Property, plant and equipment			28,153
Less: Accumulated depreciation			(15,133)
Property, plant and equipment, net			13,020
Successor [Member]
Land			249
Buildings and leasehold improvements			1,176
General support			173
Central office/electronic circuit equipment			969
Poles			516
Cable, fiber, and wire			3,069
Conduit			1,329
Construction work in progress			1,066
Property, plant and equipment			8,547
Property, plant and equipment, net			$ 8,547