Earnings Per Share - Schedule of Computation of Basic and Diluted Earnings Per Common Share (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended				6 Months Ended
	Jun. 30, 2023	Mar. 31, 2023	Jun. 30, 2022	Mar. 31, 2022	Jun. 30, 2023	Jun. 30, 2022
Numerator:
Consolidated net income	$ 587	$ 740	$ 280	$ 395	$ 1,328	$ 675
Denominator:
Denominator for basic earnings per common share - weighted-average common shares outstanding (in shares)	786		782		785	781
Effect of dilutive stock options and awards under the treasury stock method (in shares)	8		6		8	6
Denominator for diluted earnings per common share—weighted-average common shares outstanding plus dilutive common shares under the treasury stock method (in shares)	794		788		793	787
Basic earnings per common share (in dollars per share)	$ 0.75		$ 0.36		$ 1.69	$ 0.86
Diluted earnings per common share (in dollars per share)	$ 0.74		$ 0.36		$ 1.67	$ 0.86