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Commitments and Contingencies (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Loss Contingency, Estimate [Abstract]
Accrual for legal proceedings and unasserted claims	$ 0
Maximum
Loss Contingency, Estimate [Abstract]
Accrual for legal proceedings and unasserted claims		$ 1
UScellular
Loss Contingency, Estimate [Abstract]
FCC License Auction, Percent of Bid Credit in Each Auction	25.00%

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FCC License Auction, Percent of Bid Credit in Each Auction

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- Definition

Amount of loss contingency liability.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 450
-SubTopic 20
-Section 50
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=121557415&loc=d3e14326-108349

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