Financial Instruments - Narrative (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2023	Sep. 30, 2022	Sep. 30, 2023	Sep. 30, 2022	Dec. 31, 2022	Oct. 31, 2023	May 31, 2023
Derivative [Line Items]
Derivative, notional amount	$ 29,808		$ 29,808		$ 28,681
Pretax net unrealized gain on derivatives maturing within the next 12 months estimated to be reclassified from AOCI to sales	269		269
Equity investments without readily determinable fair values	863	$ 705	863	$ 705
Unrealized gains recognized on investments in equity securities without readily determinable fair value			7	21
Unrealized losses recognized on investments in equity securities without readily determinable fair values			24	12
Cumulative unrealized gains on investments	296		296
Cumulative unrealized losses on investments	40		40
(Income) loss from investments in equity securities, net	33	371	(240)	1,361
Fair value of loans payable and long-term debt, including current portion	29,500		29,500		26,700
Debt, carrying amount	34,900		34,900		30,700
Factored accounts receivable			3,500		2,500
Cash collateral received from counterparties	143		143		66
Cash collateral advanced to counterparties					19
Accounts Receivable Factoring Collections
Derivative [Line Items]
Restricted cash	39		39		67
Senior Notes | 4.50% Notes Due 2033
Derivative [Line Items]
Stated interest rate							4.50%
Equity Funds
Derivative [Line Items]
Equity securities held through ownership interest in investments funds	467	655	467	655
(Income) loss from investments in equity securities, net	93	$ 141	66	$ 952
Level 2
Derivative [Line Items]
Cash equivalents	7,800		7,800		11,300
Interest rate swap contracts | 4.50% note due 2033
Derivative [Line Items]
Derivative, notional amount	750		750
Interest rate swap contracts | 4.50% note due 2033 | Subsequent Event
Derivative [Line Items]
Derivative, notional amount						$ 250
Derivatives Designated as Hedging Instruments
Derivative [Line Items]
Derivative, notional amount	11,413		11,413		9,215
Derivatives Not Designated as Hedging Instruments
Derivative [Line Items]
Derivative, notional amount	$ 18,395		$ 18,395		$ 19,466
Maximum | Derivatives Designated as Hedging Instruments
Derivative [Line Items]
Maximum average period of maturities of contracts in years (less than)			2 years
Maximum | Derivatives Not Designated as Hedging Instruments
Derivative [Line Items]
Maximum average period of maturities of contracts in years (less than)			6 months