Revenue (Disaggregation Of Revenue) (Details) - Product Concentration Risk [Member] - Revenue from Contract with Customer [Member]	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Disaggregation of Revenue [Line Items]
Total net sales	100.00%	100.00%	100.00%
Construction
Disaggregation of Revenue [Line Items]
Total net sales	58.60%	58.20%	58.40%
CIG
Disaggregation of Revenue [Line Items]
Total net sales	25.40%	26.70%	26.40%
Industrial & Utility
Disaggregation of Revenue [Line Items]
Total net sales	16.00%	15.10%	15.20%