Debt - Summary of Outstanding Debt (Details) € in Millions, $ in Millions	1 Months Ended		9 Months Ended		12 Months Ended
	May 31, 2024 EUR (€)	Feb. 29, 2024 EUR (€)	Sep. 30, 2024 USD ($)	Sep. 30, 2023 USD ($)	Dec. 31, 2023 USD ($)	Jun. 30, 2024 EUR (€)
SHORT-TERM
Commercial paper			$ 3,278		$ 4,483
Other bank borrowings (primarily non U.S.)			231		230
Total short-term debt			3,509		4,713
LONG-TERM
Carrying value of long-term debt including current portion			18,753		14,660
Less: current portion of long-term debt			(1,278)		(1,263)
Total long-term debt			17,475		13,397
Total debt			22,262		19,373
Repayments of notes			973	$ 1,651
Derivatives Designated as Hedging Instruments - Fair Value | Interest rate swaps | Designated as Hedging Instrument
LONG-TERM
Fair value increase			$ 36		46
1.20% Euro denominated notes due 2024
LONG-TERM
Interest rate		1.20%	1.20%
Carrying value of long-term debt including current portion			$ 0		607
Repayments of notes | €		€ 550
1.875% Euro denominated notes due 2024
LONG-TERM
Interest rate	1.875%		1.875%
Carrying value of long-term debt including current portion			$ 0		332
Repayments of notes | €	€ 300
4.800% Notes due 2024
LONG-TERM
Interest rate			4.80%
Carrying value of long-term debt including current portion			$ 300		300
4.700% Notes due 2025
LONG-TERM
Interest rate			4.70%
Carrying value of long-term debt including current portion			$ 599		599
2.65% Notes due 2025
LONG-TERM
Interest rate			2.65%
Carrying value of long-term debt including current portion			$ 400		399
1.625% Euro denominated notes due 2025
LONG-TERM
Interest rate			1.625%
Carrying value of long-term debt including current portion			$ 556		550
3.625% Euro denominated notes due 2025
LONG-TERM
Interest rate			3.625%
Carrying value of long-term debt including current portion			$ 556		551
0.00% Euro denominated notes due 2026
LONG-TERM
Interest rate			0.00%
Carrying value of long-term debt including current portion			$ 781		774
3.20% Notes due 2026
LONG-TERM
Interest rate			3.20%
Carrying value of long-term debt including current portion			$ 725		724
3.434% Notes due 2026
LONG-TERM
Interest rate			3.434%
Carrying value of long-term debt including current portion			$ 199		198
1.652% Euro denominated notes due 2027
LONG-TERM
Interest rate			1.652%
Carrying value of long-term debt including current portion			$ 90		90
0.25% Euro denominated notes due 2027
LONG-TERM
Interest rate			0.25%
Carrying value of long-term debt including current portion			$ 834		827
1.00% Euro denominated notes due 2027
LONG-TERM
Interest rate			1.00%
Carrying value of long-term debt including current portion			$ 558		553
1.00% Euro denominated notes due 2028
LONG-TERM
Interest rate			1.00%
Carrying value of long-term debt including current portion			$ 796		780
3.00% Euro denominated notes due 2028
LONG-TERM
Interest rate		3.00%	3.00%
Carrying value of long-term debt including current portion			$ 776		0
Face amount of notes issued | €		€ 700
3.375% Euro denominated notes due 2029
LONG-TERM
Interest rate			3.375%
Carrying value of long-term debt including current portion			$ 832		824
1.10% Notes due 2030
LONG-TERM
Interest rate			1.10%
Carrying value of long-term debt including current portion			$ 697		697
1.90% Euro denominated notes due 2030
LONG-TERM
Interest rate			1.90%
Carrying value of long-term debt including current portion			$ 115		114
3.375% Euro denominated notes due 2030
LONG-TERM
Interest rate			3.375%			3.375%
Carrying value of long-term debt including current portion			$ 830		0
Face amount of notes issued | €						€ 750
1.375% Euro denominated notes due 2031
LONG-TERM
Interest rate			1.375%
Carrying value of long-term debt including current portion			$ 837		829
3.20% Euro denominated notes due 2031
LONG-TERM
Interest rate		3.20%	3.20%
Carrying value of long-term debt including current portion			$ 944		0
Face amount of notes issued | €		€ 850
0.55% Euro denominated notes due 2032
LONG-TERM
Interest rate			0.55%
Carrying value of long-term debt including current portion			$ 831		823
0.375% Euro denominated notes due 2033
LONG-TERM
Interest rate			0.375%
Carrying value of long-term debt including current portion			$ 551		546
3.625% Euro denominated notes due 2034
LONG-TERM
Interest rate			3.625%
Carrying value of long-term debt including current portion			$ 720		714
3.500% Euro denominated notes due 2034
LONG-TERM
Interest rate			3.50%			3.50%
Carrying value of long-term debt including current portion			$ 827		0
Face amount of notes issued | €						€ 750
1.625% Euro denominated notes due 2035
LONG-TERM
Interest rate			1.625%
Carrying value of long-term debt including current portion			$ 885		876
3.40% Euro denominated notes due 2036
LONG-TERM
Interest rate		3.40%	3.40%
Carrying value of long-term debt including current portion			$ 773		0
Face amount of notes issued | €		€ 700
3.55% Notes due 2042
LONG-TERM
Interest rate			3.55%
Carrying value of long-term debt including current portion			$ 666		666
3.75% Euro denominated notes due 2044
LONG-TERM
Interest rate			3.75%			3.75%
Carrying value of long-term debt including current portion			$ 764		0
Face amount of notes issued | €						€ 700
2.00% Notes due 2050
LONG-TERM
Interest rate			2.00%
Carrying value of long-term debt including current portion			$ 297		296
1.00% Euro denominated notes due 2051
LONG-TERM
Interest rate			1.00%
Carrying value of long-term debt including current portion			$ 762		755
Non U.S. borrowings
LONG-TERM
Carrying value of long-term debt including current portion			242		226
Other
LONG-TERM
Carrying value of long-term debt including current portion			$ 10		$ 10