Consolidated Balance Sheets (Parenthetical) - USD ($) shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Trade accounts receivable allowance	$ 126	$ 124
Preferred stock, no par value	$ 0	$ 0
Preferred stock, shares authorized (in shares)	15,000	15,000
Common stock par value (in usd per share)	$ 0.01	$ 0.01
Common stock shares authorized (in shares)	2,000,000	2,000,000
Common stock shares issued (in shares)	869,300	855,700
Common stock shares outstanding (in shares)	728,300	715,000
Series A Preferred Stock
Preferred stock, shares issued (in shares)	0	1,650
Preferred stock, shares outstanding (in shares)	0	1,650
Preferred stock, dividend rate, percentage	4.75%	4.75%
Series B Preferred Stock
Preferred stock, shares issued (in shares)	1,720	1,720
Preferred stock, shares outstanding (in shares)	1,720	1,720
Preferred stock, dividend rate, percentage	5.00%	5.00%