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Pension - Summary of Balance Sheet Impact, Including Benefit Obligations, Assets and Funded Status (Parenthetical) (Details)	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2018
Defined Benefit Plan Disclosure [Line Items]
Date of business spin-off	Oct. 29, 2018
Pension Plan
Defined Benefit Plan Disclosure [Line Items]
Date of business spin-off		Oct. 29, 2018

X

- Definition

Date of business spin-off.

+ References

No definition available.

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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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Namespace Prefix:	us-gaap_
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X

- Details

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