Property, Plant And Equipment (Tables)	12 Months Ended
	Dec. 31, 2021
Property, Plant And Equipment [Abstract]
Property, Plant And Equipment, Net	Successor Predecessor Estimated December 31, December 31, ($ in millions) Useful Lives 2021 2020      Land N/A $  251  $ 212  Buildings and leasehold improvements 40 years 1,195  2,139  General support 5 to 15 years 212  1,643  Central office/electronic circuit equipment 5 to 8 years 1,266  8,270  Poles 30 years 677  1,371  Cable, fiber, and wire 15 to 25 years 4,101  11,883  Conduit 50 years 1,374  1,619  Construction work in progress 631  558  Property, plant, and equipment 9,707  27,695  Less: Accumulated depreciation (508) (14,764) Property, plant, and equipment, net $ 9,199  $ 12,931
Schedule Of Depreciation Expense	Successor Predecessor For the eight For the four For the year For the year months ended months ended ended ended December 31, April 30, December 31, December 31, ($ in millions)2021 2021 2020 2019 Depreciation expense$ 520  $ 407  $ 1,225  $ 1,335