Description of Business and Accounting Policies - Narrative (Details) - USD ($)		3 Months Ended				6 Months Ended
	Aug. 02, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Description of Business and Accounting Policies [Line Items]
Insurance proceeds received for damage to equipment						$ 3,300,000	$ 200,000
Other current liabilities		$ 29,200,000		$ 42,000,000		29,200,000
Other noncurrent liabilities		222,700,000		127,900,000		222,700,000
General claims liability				4,000,000
Effective income tax rate reconciliation, disposal group						17,100,000
Income tax expense (benefit)						18,000,000
Changes in federal valuation allowances on deferred tax assets						27,100,000
Income tax (benefit) expense		(2,600,000)			$ (1,900,000)	31,200,000	(6,500,000)
Loss from continuing operations before income taxes		40,000,000			$ 21,400,000	53,900,000	$ 99,400,000
Benefit expected at statutory rates		(8,400,000)
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] | Subsequent Event [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				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
General insurance liability				4,000,000
Other current liabilities				2,000,000
Other noncurrent liabilities				2,000,000
Legal expense						3,400,000
Involuntary Events and Contingencies [Member] | Other Noncurrent Assets [Member]
Description of Business and Accounting Policies [Line Items]
Offsetting receivable		96,600,000		2,000,000		96,600,000
Involuntary Events and Contingencies [Member] | Other Noncurrent Liabilities [Member]
Description of Business and Accounting Policies [Line Items]
General insurance liability		97,500,000				97,500,000
Involuntary Events and Contingencies [Member] | Accounts Receivable [Member]
Description of Business and Accounting Policies [Line Items]
Offsetting receivable		$ 1,500,000				$ 1,500,000
One'Ohana Initiative Voluntary Fund [Member]
Description of Business and Accounting Policies [Line Items]
Insurance voluntary fund				$ 2,500,000