Equity Textuals (Details) - USD ($) $ / shares in Units, $ in Thousands	2 Months Ended	12 Months Ended
	Feb. 16, 2021	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Preferred Stock, Shares Authorized		1,000,000
Preferred Stock, Par or Stated Value Per Share		$ 1
Common stock, shares authorized		500,000,000
Common stock, par or stated value per share		$ 1
Common stock, shares, issued		174,792,272	185,100,789
Common stock, shares outstanding		170,717,236	181,184,963
Treasury Stock, Shares, Acquired		12,043,347	2,908,850
Treasury Stock, Value, Acquired, Par Value Method		$ 516,900	$ 129,600
Treasury Stock Acquired, Average Cost Per Share		$ 42.92	$ 44.55
Stock Repurchase Program, Authorized Amount		$ 500,000
Stock Repurchase Program, Remaining Authorized Repurchase Amount		231,000
Payments of Dividends, Common Stock		$ 137,392	$ 131,402	$ 123,849
Subsequent Event [Member]
Treasury Stock, Shares, Acquired	802,146
Treasury Stock, Value, Acquired, Par Value Method	$ 40,700
Treasury Stock Acquired, Average Cost Per Share	$ 50.74