Description of Business and Accounting Policies - Narrative (Details) - USD ($)		3 Months Ended				15 Months Ended	20 Months Ended
	Aug. 02, 2024	Mar. 31, 2025	Mar. 31, 2024		Dec. 31, 2023	Mar. 31, 2025	Mar. 31, 2025	Dec. 31, 2024
Description of Business and Accounting Policies [Line Items]
Insurance proceeds received for damage to equipment		$ 200,000	$ 3,200,000	[1]
Other current liabilities		135,600,000				$ 135,600,000	$ 135,600,000	$ 26,800,000
Other noncurrent liabilities		138,500,000				138,500,000	138,500,000	238,500,000
Income tax (benefit) expense		500,000	33,800,000
Loss from continuing operations before income taxes		13,900,000	13,900,000
Benefit expected at statutory rates		2,900,000
Loss from Windstorm and Wildfires
Description of Business and Accounting Policies [Line Items]
Amount payable to resolve tort claims arising from wildfires	$ 4,037,000,000.000
Hawaiian Telcom [Member] | Loss from Windstorm and Wildfires
Description of Business and Accounting Policies [Line Items]
Amount payable to resolve tort claims arising from wildfires	$ 100,000,000
Other Noncurrent Liabilities [Member]
Description of Business and Accounting Policies [Line Items]
Incremental liability related to tort claims								$ 93,500,000
Involuntary Events and Contingencies [Member]
Description of Business and Accounting Policies [Line Items]
Insurance proceeds received for damage to equipment			3,000,000			7,000,000
Legal expense		200,000	$ 2,000,000				13,200,000
Involuntary Events and Contingencies [Member] | Insurance Receivable [Member]
Description of Business and Accounting Policies [Line Items]
Legal expense		8,700,000
Involuntary Events and Contingencies [Member] | Other Current Assets [Member]
Description of Business and Accounting Policies [Line Items]
Offsetting receivable		96,600,000				96,600,000	96,600,000
Involuntary Events and Contingencies [Member] | Other Current Liabilities [Member]
Description of Business and Accounting Policies [Line Items]
General insurance liability		$ 97,500,000				$ 97,500,000	$ 97,500,000
One'Ohana Initiative Voluntary Fund [Member]
Description of Business and Accounting Policies [Line Items]
Insurance voluntary fund					$ 2,500,000

[1] Cash flows information includes cash flows from discontinued operations for the quarter ended March 31, 2024.