Debt And Lines Of Credit (Summary of Long-Term Debt Footnotes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Debt Instrument [Line Items]
Long-term debt, fair value	$ 5,200	$ 7,100
Variable Rate Debt [Member]
Debt Instrument [Line Items]
Long-term Debt, Weighted Average Interest Rate, at Point in Time	4.60%	1.40%
Environmental and industrial development bonds – due 2023 – 2028 (b)
Debt Instrument [Line Items]
Long-term Debt, Weighted Average Interest Rate, at Point in Time	2.40%	3.20%
Other (c)
Debt Instrument [Line Items]
Fair Value, Debt Instrument, Valuation Techniques, Change in Technique, Quantification of Effect	$ 0	$ 1