Right of use assets and lease liabilities.

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Secured leverage ratio.

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Summary of significant accounting policies.

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Exercise price per share or per unit of warrants or rights outstanding.

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For an entity that discloses a concentration risk in relation to quantitative amount, which serves as the "benchmark" (or denominator) in the equation, this concept represents the concentration percentage derived from the division.

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Amount of the cumulative effect on retained earnings net of related income tax effect.

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Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt.

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Contractual interest rate for funds borrowed, under the debt agreement.

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Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

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Amount of cumulative effect of the change in accounting principle or new accounting pronouncement on retained earnings or other components of equity or net assets in the statement of financial position as of the beginning of the earliest period presented.

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Basis of Presentation and Summary of Significant Accounting Policies - Additional Information (Details) - USD ($) $ / shares in Units, $ in Thousands				9 Months Ended		12 Months Ended
	Jun. 28, 2019	Jun. 25, 2019	Jan. 01, 2019	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018	Apr. 28, 2017
Summary Of Significant Accounting Policies [Line Items]
Consolidated secured leverage ratio				500.00%
Debt instrument amount				$ 5,230,017		$ 4,965,808
Common stock aggregate at an exercise price	$ 16.42	$ 16.42
Impact of change in accounting standard, net of tax				(63,222)	$ 1,859
Maximum
Summary Of Significant Accounting Policies [Line Items]
Consolidated secured leverage ratio							500.00%
Warrants \| Maximum
Summary Of Significant Accounting Policies [Line Items]
Anti-dilution adjustments	27,800,000	27,800,000
Exchangeable Notes
Summary Of Significant Accounting Policies [Line Items]
Debt instrument amount	$ 345,000			$ 345,000
Issuance senior notes, stated percentage	4.00%			4.00%
Debt instrument, maturity date	Jun. 15, 2024			Jun. 15, 2024
Accounting Standards Update ("ASU") No. 2016-02
Summary Of Significant Accounting Policies [Line Items]
Write off adjustment to equity resulting from change in accounting standard			$ 61,500
Impact of change in accounting standard, net of tax			63,200
Right of use assets and lease liabilities			$ 1,700
Windstream \| Revenue
Summary Of Significant Accounting Policies [Line Items]
Master lease revenue percentage				65.30%	69.60%	68.20%