Investments - Narrative (Details)	9 Months Ended
Sep. 30, 2020
Minimum
Debt Securities, Available-for-sale [Line Items]
Derivative maturity date range	1 year
Maximum
Debt Securities, Available-for-sale [Line Items]
Derivative maturity date range	2 years

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.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration