Related Parties - Components Of Service Agreement's Net Expenses (Details) - USD ($)	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018
Related Party Transaction [Line Items]
Revenue from related parties	$ 6,400,000	$ 21,800,000
Harbinger Capital Partners \| Affiliated Entity
Related Party Transaction [Line Items]
Expenses under service agreement	2,700,000	3,800,000
Revenue from related parties	300,000	0
Net related party activity	2,400,000	3,800,000
Harbinger Capital Partners \| Affiliated Entity \| Corporate
Related Party Transaction [Line Items]
Expenses under service agreement	1,900,000	2,500,000
Revenue from related parties	300,000	0
Net related party activity	1,600,000	2,500,000
Harbinger Capital Partners \| Affiliated Entity \| Operating Segments
Related Party Transaction [Line Items]
Expenses under service agreement	800,000	1,300,000
Revenue from related parties	0.0	0
Net related party activity	800,000	1,300,000
Harbinger Capital Partners \| Office Space \| Affiliated Entity
Related Party Transaction [Line Items]
Expenses under service agreement	2,600,000	3,200,000
Harbinger Capital Partners \| Office Space \| Affiliated Entity \| Corporate
Related Party Transaction [Line Items]
Expenses under service agreement	1,800,000	2,000,000.0
Harbinger Capital Partners \| Office Space \| Affiliated Entity \| Operating Segments
Related Party Transaction [Line Items]
Expenses under service agreement	800,000	1,200,000
Harbinger Capital Partners \| Salaries And Benefits \| Affiliated Entity
Related Party Transaction [Line Items]
Expenses under service agreement	100,000	500,000
Revenue from related parties	200,000	0
Harbinger Capital Partners \| Salaries And Benefits \| Affiliated Entity \| Corporate
Related Party Transaction [Line Items]
Expenses under service agreement	100,000	400,000
Revenue from related parties	200,000	0
Harbinger Capital Partners \| Salaries And Benefits \| Affiliated Entity \| Operating Segments
Related Party Transaction [Line Items]
Expenses under service agreement	0.0	100,000
Revenue from related parties	0.0	0
Harbinger Capital Partners \| Other Operational Support \| Affiliated Entity
Related Party Transaction [Line Items]
Expenses under service agreement	0	100,000
Revenue from related parties	100,000	0
Harbinger Capital Partners \| Other Operational Support \| Affiliated Entity \| Corporate
Related Party Transaction [Line Items]
Expenses under service agreement	0	100,000
Revenue from related parties	100,000	0
Harbinger Capital Partners \| Other Operational Support \| Affiliated Entity \| Operating Segments
Related Party Transaction [Line Items]
Expenses under service agreement	0	0.0
Revenue from related parties	$ 0.0	$ 0

Transactions With Related Parties, Revenues (Expenses)

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- Definition

Expenses recognized resulting from transactions (excluding transactions that are eliminated in consolidated or combined financial statements) with related party.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

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- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

Amount of revenue, fees and commissions earned from transactions between (a) a parent company and its subsidiaries; (b) subsidiaries of a common parent; (c) an entity and trusts for the benefit of employees, for example, but not limited to, pension and profit-sharing trusts that are managed by or under the trusteeship of the entity's management; (d) an entity and its principal, owners, management, or members of their immediate families; and (e) affiliates.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 946
-SubTopic 220
-Section S99
-Paragraph 1
-Subparagraph (SX 210.6-07.1(c))
-URI http://asc.fasb.org/extlink&oid=116637345&loc=SL114874292-224272

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 220
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.1(e))
-URI http://asc.fasb.org/extlink&oid=116634182&loc=SL114868664-224227

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