CONSOLIDATED STATEMENT OF EQUITY (UNAUDITED) - USD ($) shares in Millions, $ in Millions	Total	Common Stock	Additional Paid-In Capital	Retained Earnings	Treasury Stock	Capital Stock Expense	Accumulated Other Comprehensive Income/(Loss)	Non- controlling Interest
Beginning Balance (shares) at Dec. 31, 2020		342			23
Beginning Balance at Dec. 31, 2020	$ 19,065	$ 36	$ 8,808	$ 11,178	$ (1,038)	$ (112)	$ (25)	$ 218
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	420			419				1
Common stock dividends	(265)			(265)
Issuance of common shares for stock plans	28		28
Other comprehensive income	4						4
Distributions to noncontrolling interest	(3)							(3)
Net proceeds from sale of equity interest	33							33
Ending Balance (shares) at Mar. 31, 2021		342			23
Ending Balance at Mar. 31, 2021	19,282	$ 36	8,836	11,332	$ (1,038)	(112)	(21)	249
Beginning Balance (shares) at Dec. 31, 2021		354			23
Beginning Balance at Dec. 31, 2021	20,336	$ 37	9,710	11,445	$ (1,038)	(122)	5	299
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	554			602				(48)
Common stock dividends	(280)			(280)
Issuance of common shares - public offering	1					1
Issuance of common shares for stock plans	18		18
Other comprehensive income	0
Distributions to noncontrolling interest	(6)							(6)
Ending Balance (shares) at Mar. 31, 2022		354			23
Ending Balance at Mar. 31, 2022	$ 20,623	$ 37	$ 9,728	$ 11,767	$ (1,038)	$ (121)	$ 5	$ 245