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Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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Amount of write-down of assets recognized in the income statement. Includes, but is not limited to, losses from tangible assets, intangible assets and goodwill.

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Amount of amortization expense for asset recognized from cost incurred to obtain or fulfill contract with customer.

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Amount, after accumulated amortization and accumulated impairment loss, of asset recognized from cost incurred to obtain or fulfill contract with customer.

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Amount, after deferred tax asset, of deferred tax liability attributable to taxable differences with jurisdictional netting.

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Summary of Significant Accounting Policies (Details) - USD ($) $ in Thousands			3 Months Ended
	Dec. 30, 2020	Jul. 01, 2020	Mar. 31, 2021	Mar. 31, 2020	Dec. 31, 2020
Accounting policy disclosures
Capitalized Contract Cost			$ 103,000	$ 38,000
Amortization expense related to the programs			75,000	27,000
Total costs capitalized			484,000		$ 456,000
Derivative Financial Instruments
Derivative instruments - net realized and/or unrealized gains (losses)			(4,000)
Impairment of Long-Lived Assets
Impairment of long-lived assets				356,418
Accounting Standards Update and Change in Accounting Principle [Abstract]
Deferred Tax Liabilities, Net, Noncurrent			3,771,572		3,869,570
Variable Interest Entity
Redeemable noncontrolling interests			361,777		$ 350,648
Advertising expenses			110,000	131,000
Research and Development
Research and development cost			$ 7,000	6,000
Minimum
Business Combinations
Acquired intangible assets, average finite useful life			1 year
Maximum
Business Combinations
Acquired intangible assets, average finite useful life			20 years
NBIoT capitalized costs
Impairment of Long-Lived Assets
Impairment of long-lived assets				$ 253,000
Northstar Manager LLC \| Class B common stock
Variable Interest Entity
Ownership percentage	97.00%
Payment For Purchase Agreement	$ 312,000
Equity Method Investment, Ownership Percentage	3.00%
Northstar Manager LLC \| American II \| Class B common stock
Variable Interest Entity
Ownership percentage owned by other companies	80.00%
ASU 2020-06
Accounting Standards Update and Change in Accounting Principle [Abstract]
Convertible debt reclassed per ASU 2020-06 (1)			$ 1,051,344
Adjustments to Additional Paid in Capital, Equity Component of Convertible Debt			(1,051,000)
Deferred Tax Liabilities, Net, Noncurrent			245,778
Additional Paid in Capital			(246,000)
AWS-4 Satellites
Accounting policy disclosures
Fair value after write down			0
Impairment of Long-Lived Assets
Impairment of long-lived assets			$ 103,000
Boost Mobile Aquisition [Member] \| Minimum
Impairment of Long-Lived Assets
Useful life		1 year
Boost Mobile Aquisition [Member] \| Maximum
Impairment of Long-Lived Assets
Useful life		10 years