Condensed Consolidated Balance Sheets (Parenthetical) - $ / shares	Sep. 30, 2020	Dec. 31, 2019
Statement of Financial Position [Abstract]
Series preferred stock, par value (USD per share)	$ 0.10	$ 0.10
Series preferred stock, shares authorized (in shares)	250,000,000	250,000,000
Series preferred stock, shares issued (in shares)	0	0
Common stock, par value (USD per share)	$ 0.10	$ 0.10
Common stock, shares authorized (in shares)	6,250,000,000	6,250,000,000
Common stock, shares issued (in shares)	4,291,433,646	4,291,433,646
Treasury stock, shares issued (in shares)	153,339,279	155,605,527