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Discontinued Operations - Narrative (Details) - USD ($)		3 Months Ended	12 Months Ended
	Aug. 26, 2020	Mar. 31, 2020	Dec. 31, 2020	Feb. 01, 2021	Dec. 31, 2019
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current liabilities held for sale			$ 452,202,000		$ 53,912,000
Current liabilities			1,208,061,000		153,577,000
Increase in assets		$ 34,000,000
Increase in liabilities		$ 34,000,000
Wireless Segment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Accounts receivable					51,000,000.0
Current liabilities					27,700,000
Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Current liabilities held for sale			452,202,000		$ 53,912,000
Discontinued Operations, Held-for-sale | Wireless Segment
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Disposal group, accounts receivable			51,700,000
Current liabilities held for sale			6,100,000
Subsequent Event | Discontinued Operations, Held-for-sale
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sale proceeds				$ 1,950,000,000
Minimum
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Accelerated expenses			0
Maximum
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Accelerated expenses			$ 35,900,000
Affiliated Entity
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Value of business percentage	90.00%

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