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Subsidy And Other Regulatory Revenue

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Amount of lease income from operating, direct financing, and sales-type leases. Includes, but is not limited to, variable lease payments, interest income, profit (loss) recognized at commencement, and lease payments paid and payable to lessor.

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

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Amount of revenue recognized from goods sold, services rendered, insurance premiums, or other activities that constitute an earning process. Includes, but is not limited to, investment and interest income before deduction of interest expense when recognized as a component of revenue, and sales and trading gain (loss).

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Revenue Recognition (Disaggregation Of Revenue) (Details) - USD ($) $ in Millions	3 Months Ended		4 Months Ended	5 Months Ended	9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Apr. 30, 2021	Sep. 30, 2021	Sep. 30, 2020
Successor [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 1,493			$ 2,499
Subsidy and other revenue	83			138
Total revenue	1,576			2,637
Lease revenue	16			26
Successor [Member] \| Data And Internet Services [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	834			1,390
Successor [Member] \| Voice Services [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	411			694
Successor [Member] \| Video Services [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	149			254
Successor [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	99			161
Successor [Member] \| Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	800			1,343
Successor [Member] \| Business And Wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers	$ 693			$ 1,156
Predecessor [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		$ 1,627	$ 2,120		$ 5,175
Subsidy and other revenue		99	111		285
Total revenue		1,726	2,231		5,460
Lease revenue		16	21		50
Predecessor [Member] \| Data And Internet Services [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		838	1,125		2,644
Predecessor [Member] \| Voice Services [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		500	647		1,595
Predecessor [Member] \| Video Services [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		186	223		608
Predecessor [Member] \| Other [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		103	125		328
Predecessor [Member] \| Consumer [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		865	1,133		2,746
Predecessor [Member] \| Business And Wholesale [Member]
Disaggregation of Revenue [Line Items]
Revenue from contracts with customers		762	$ 987		2,429
Predecessor [Member] \| Northwest Operations [Member]
Disaggregation of Revenue [Line Items]
Transition services revenue		$ 15			$ 25