Summary of Significant Accounting Policies - Principles of Consolidation (Details) - Uniti [Member] - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Noncontrolling Interest [Line Items]
Equity method investment ownership percentage	50.00%
Related party accounts receivable	$ 0.2	$ 1.8

Amount of receivables arising from transactions with related parties due within one year or the normal operating cycle, if longer.

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Period Type:	instant