CONDENSED CONSOLIDATED STATEMENTS OF COMMON SHAREHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Shares	Capital Surplus, Paid In	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock
Balance (in shares) at Dec. 31, 2020		342,954,023
Balance at Dec. 31, 2020	$ 14,063,566	$ 1,789,092	$ 8,015,663	$ 4,613,201	$ (76,411)	$ (277,979)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	368,023			368,023
Dividends on Common Stock	(206,913)			(206,913)
Dividends on Preferred Stock	(1,880)			(1,880)
Long-Term Incentive Plan Activity	(15,727)		(15,727)
Issuance of Treasury Shares (in shares)		480,275
Issuance of Treasury Shares	25,163		16,182			8,981
Other Comprehensive (Loss)/Income, Net of Tax	1,188				1,188
Balance (in shares) at Mar. 31, 2021		343,434,298
Balance at Mar. 31, 2021	$ 14,233,420	$ 1,789,092	8,016,118	4,772,431	(75,223)	(268,998)
Balance (in shares) at Dec. 31, 2021	344,403,196	344,403,196
Balance at Dec. 31, 2021	$ 14,599,844	$ 1,789,092	8,098,514	5,005,391	(42,275)	(250,878)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net Income	445,326			445,326
Dividends on Common Stock	(219,768)			(219,768)
Dividends on Preferred Stock	(1,880)			(1,880)
Long-Term Incentive Plan Activity	(16,538)		(16,538)
Issuance of Treasury Shares (in shares)		447,076
Issuance of Treasury Shares	29,002		20,642			8,360
Other Comprehensive (Loss)/Income, Net of Tax	$ 704				704
Balance (in shares) at Mar. 31, 2022	344,850,272	344,850,272
Balance at Mar. 31, 2022	$ 14,836,690	$ 1,789,092	$ 8,102,618	$ 5,229,069	$ (41,571)	$ (242,518)