CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Dec. 31, 2018	Dec. 31, 2017
Equity (Note G)
Common stock, shares, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares, authorized (in shares)	1,200,000,000	1,200,000,000
Common stock, shares, issued (in shares)	445,016,234	423,166,234
Common stock, shares, outstanding (in shares)	411,532,606	388,703,543
Treasury stock, shares (in shares)	33,483,628	34,462,691
Preferred stock, shares, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares, issued (in shares)	20,000	20,000
Preferred stock, shares, authorized (in shares)	20,000	20,000