Common Equity Common Stock And Treasury Stock Shares Activity (Details) - USD ($) $ in Thousands		1 Months Ended	12 Months Ended
	Dec. 12, 2018	May 31, 2019	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Class of Stock and Treasury Stock [Line Items]
Proceeds from Issuance of Common Stock	$ 500,000	$ 608,000	$ 200,776	$ 0	$ 607,650
Common Stock And Treasury Stock [Roll Forward]
Stock Issued During Period, Shares, New Issues			1,930,330
Common Stock [Member]
Common Stock And Treasury Stock [Roll Forward]
Beginning Balance			270,035,180	270,035,180	261,587,009
Forward Contract Indexed to Issuer's Equity, Shares	6,834,221		0	0	8,448,171
Employee Stock-Based Compensation Plans			0	0	0
Directors' Plan			0	0	0
Ending Balance			271,965,510	270,035,180	270,035,180
Stock Issued During Period, Shares, New Issues			1,930,330	0	0
Treasury Stock [Member]
Common Stock And Treasury Stock [Roll Forward]
Beginning Balance			69,790,346	70,886,400	72,530,866
Forward Contract Indexed to Issuer's Equity, Shares			0	0	0
Employee Stock-Based Compensation Plans			(461,903)	(1,076,511)	(1,624,358)
Directors' Plan			(16,117)	(19,543)	(20,108)
Ending Balance			69,312,326	69,790,346	70,886,400
Stock Issued During Period, Shares, New Issues			0	0	0