Employee Benefit Plans (Assumptions used to Determine Net Periodic Cost and Benefit Obligations) (Details)	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Postretirement Medical and Life Benefit Plan
Defined Benefit Plan Disclosure [Line Items]
Discount Rate	2.31%	1.81%	2.81%

Weighted average rate for present value of future retirement benefits cash flows, used to determine net periodic benefit cost of defined benefit plan.

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (k)(1)
-URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920

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