Equity (Details) - USD ($) shares in Millions, $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury shares balance at beginning of period (in shares)	190
Balance at beginning of period	$ 30,508	$ 31,527
Net income (loss)	746	569
Distributions paid to noncontrolling interests	(27)
Other comprehensive income (loss)	(224)	147
Share-based compensation	86	93
Shares issued under stock plans	(154)	(59)
Purchases of treasury stock	$ (1,512)	(1,483)
Treasury shares balance at end of period (in shares)	198
Balance at end of period	$ 29,423	30,794
Net income attributable to redeemable noncontrolling interest	6	7
Distributions paid to redeemable noncontrolling interests	$ 7	$ 8
Common Shares
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Common shares balance at beginning of period (in shares)	784	784
Balance at beginning of period	$ 8	$ 8
Common shares balance at end of period (in shares)	784	784
Balance at end of period	$ 8	$ 8
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Treasury shares balance at beginning of period (in shares)	190	154
Balance at beginning of period	$ (12,915)	$ (8,378)
Shares issued under stock plans (in shares)	(2)	(2)
Shares issued under stock plans	$ 174	$ 99
Purchases of treasury stock (in shares)	10	13
Purchases of treasury stock	$ (1,512)	$ (1,483)
Treasury shares balance at end of period (in shares)	198	165
Balance at end of period	$ (14,253)	$ (9,762)
Additional Paid-In Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	23,103	23,011
Share-based compensation	86	93
Shares issued under stock plans	(328)	(158)
Balance at end of period	22,861	22,946
Accumulated Other Comprehensive Loss
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	(783)	(1,189)
Other comprehensive income (loss)	(211)	135
Balance at end of period	(994)	(1,054)
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	20,444	17,376
Net income (loss)	735	563
Balance at end of period	21,179	17,939
Noncontrolling Interests
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Balance at beginning of period	651	699
Net income (loss)	11	6
Distributions paid to noncontrolling interests	(27)
Other comprehensive income (loss)	(13)	12
Balance at end of period	$ 622	$ 717