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Income Taxes (Summary Of The Tax Years By Jurisdiction That Remain Subject To Examination By Taxing Authorities) (Details)	12 Months Ended
	Dec. 31, 2021
Minimum [Member] | United States Federal [Member]
Tax years open	2015
Maximum [Member] | United States Federal [Member]
Tax years open	2021
Various U.S. States [Member] | Minimum [Member]
Tax years open	2014
Various U.S. States [Member] | Maximum [Member]
Tax years open	2021
Canada [Member] | Minimum [Member]
Tax years open	2006
Canada [Member] | Maximum [Member]
Tax years open	2021

X

- Definition

Tax year that remains open to examination under enacted tax laws, in YYYY format.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 15
-Subparagraph (e)
-URI http://asc.fasb.org/extlink&oid=121826272&loc=d3e32718-109319

+ Details

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