Supplemental Equity and Comprehensive Income (Loss) Information - Changes in Equity (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Increase (decrease) in equity
Balance at the beginning of the period	$ 4,868	$ 14,770
Net income (loss)	933	981
Other comprehensive income (loss), net of tax:
Other comprehensive income (loss), net of tax	(47)	143
Dividends declared	(835)	(827)
Stock-based compensation	17	125
Reacquired stock	(21)	(29)
Issuances pursuant to stock option and benefit plans	18	188
Balance at the end of the period	4,933	15,351
Common Stock and Additional Paid-in Capital
Increase (decrease) in equity
Balance at the beginning of the period	6,965	6,700
Other comprehensive income (loss), net of tax:
Stock-based compensation	17	125
Balance at the end of the period	6,982	6,825
Retained Earnings
Increase (decrease) in equity
Balance at the beginning of the period	37,479	47,950
Net income (loss)	928	976
Other comprehensive income (loss), net of tax:
Dividends declared	(835)	(827)
Issuances pursuant to stock option and benefit plans	(100)	(133)
Balance at the end of the period	37,472	47,966
Treasury Stock
Increase (decrease) in equity
Balance at the beginning of the period	(32,859)	(33,255)
Other comprehensive income (loss), net of tax:
Reacquired stock	(21)	(29)
Issuances pursuant to stock option and benefit plans	118	321
Balance at the end of the period	(32,762)	(32,963)
Accumulated Other Comprehensive Income (Loss)
Increase (decrease) in equity
Balance at the beginning of the period	(6,778)	(6,673)
Other comprehensive income (loss), net of tax:
Other comprehensive income (loss), net of tax	(48)	143
Balance at the end of the period	(6,826)	(6,530)
Non-controlling Interest
Increase (decrease) in equity
Balance at the beginning of the period	61	48
Net income (loss)	5	5
Other comprehensive income (loss), net of tax:
Other comprehensive income (loss), net of tax	1
Balance at the end of the period	$ 67	$ 53