Consolidated Statement of Changes in Equity (Parenthetical) $ in Millions				12 Months Ended
	Feb. 07, 2023 $ / shares shares	Aug. 19, 2022 $ / shares shares	Apr. 26, 2022 $ / shares shares	Dec. 31, 2024 USD ($) shares	Dec. 31, 2023 USD ($) shares	Dec. 31, 2022 USD ($) shares	Nov. 01, 2023 shares	Nov. 01, 2022 shares
Par value less than $.5 million at each date | $				$ 0.5	$ 0.5	$ 0.5
Common stock held in treasury at cost (shares)				147,373,633	145,087,054
Common stock
Common stock activity, shares				500,000	500,000	500,000
Series U
Common stock activity, shares			1,000,000
Depositary shares, conversion ratio			0.01
Preferred stock, dividend rate, percentage			6.00%
Preferred stock, par value (in dollars per share) | $ / shares			$ 1
Series V
Common stock activity, shares		1,250,000
Depositary shares, conversion ratio		0.01
Preferred stock, dividend rate, percentage		6.20%
Preferred stock, par value (in dollars per share) | $ / shares		$ 1
Series P Preferred Stock
Treasury stock, preferred (shares)								15,000
Depositary Shares
Common stock held in treasury at cost (shares)				500,000			1,000,000	60,000,000
Series W
Common stock activity, shares	1,500,000
Depositary shares, conversion ratio	0.01
Preferred stock, dividend rate, percentage	6.25%
Preferred stock, par value (in dollars per share) | $ / shares	$ 1
Series O Preferred Stock
Treasury stock, preferred (shares)							10,000
Series R
Treasury stock, preferred (shares)				5,000