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v3.21.2

Pension and Other Postretirement Benefit Plans - Narrative (Details) | 1 Months Ended
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Mar. 31, 2020
Retirement Benefits [Abstract] |
Defined contribution plan, employer matching contribution, percent of match | 7.00%

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
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