Financial Instruments and Fair Value Measures - Fair Value Measures (Details) - USD ($) $ in Millions	Mar. 31, 2023	Dec. 31, 2022
Assets
Foreign currency contracts	$ 161	$ 163
Liabilities
Foreign currency contracts	544	524
Quoted prices in active markets for identical assets (Level 1)
Liabilities
Total liabilities	57,761	57,295
Fair Value, Recurring
Assets
Cash and equivalents	6,711	9,201
Debt securities	33	28
Equity securities	110	91
Interest rate swap contracts	11
Total assets	7,025	9,504
Liabilities
Interest rate swap contracts	368	392
Contingent consideration	17,931	16,384
Total liabilities	18,475	16,908
Fair Value, Recurring \| Foreign currency contracts
Assets
Foreign currency contracts	150	163
Liabilities
Foreign currency contracts	176	132
Fair Value, Recurring \| Quoted prices in active markets for identical assets (Level 1)
Assets
Cash and equivalents	3,297	4,201
Debt securities	0	0
Equity securities	80	59
Interest rate swap contracts	0
Total assets	3,377	4,260
Liabilities
Interest rate swap contracts	0	0
Contingent consideration	0	0
Total liabilities	0	0
Fair Value, Recurring \| Quoted prices in active markets for identical assets (Level 1) \| Foreign currency contracts
Assets
Foreign currency contracts	0	0
Liabilities
Foreign currency contracts	0	0
Fair Value, Recurring \| Significant other observable inputs (Level 2)
Assets
Cash and equivalents	3,414	5,000
Debt securities	33	28
Equity securities	30	32
Interest rate swap contracts	11
Total assets	3,648	5,244
Liabilities
Interest rate swap contracts	368	392
Contingent consideration	0	0
Total liabilities	544	524
Fair Value, Recurring \| Significant other observable inputs (Level 2) \| Foreign currency contracts
Assets
Foreign currency contracts	150	163
Liabilities
Foreign currency contracts	176	132
Fair Value, Recurring \| Significant unobservable inputs (Level 3)
Assets
Cash and equivalents	0	0
Debt securities	0	0
Equity securities	0	0
Interest rate swap contracts	0
Total assets	0	0
Liabilities
Interest rate swap contracts	0	0
Contingent consideration	17,931	16,384
Total liabilities	17,931	16,384
Fair Value, Recurring \| Significant unobservable inputs (Level 3) \| Foreign currency contracts
Assets
Foreign currency contracts	0	0
Liabilities
Foreign currency contracts	0	0
Money market funds and time deposits \| Fair Value, Recurring
Assets
Money market funds and time deposits	10	21
Money market funds and time deposits \| Fair Value, Recurring \| Quoted prices in active markets for identical assets (Level 1)
Assets
Money market funds and time deposits	0	0
Money market funds and time deposits \| Fair Value, Recurring \| Significant other observable inputs (Level 2)
Assets
Money market funds and time deposits	10	21
Money market funds and time deposits \| Fair Value, Recurring \| Significant unobservable inputs (Level 3)
Assets
Money market funds and time deposits	$ 0	$ 0

Fair value portion of probable future economic benefits obtained or controlled by an entity as a result of past transactions or events.

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Amount of investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount of liability recognized arising from contingent consideration in a business combination.

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Fair value portion of currency on hand as well as demand deposits with banks or financial institutions. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates.

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Fair value, before effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes assets elected not to be offset. Excludes assets not subject to a master netting arrangement.

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Fair value, before effects of master netting arrangements, of a financial liability or contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. Includes liabilities elected not to be offset. Excludes liabilities not subject to a master netting arrangement.

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Amount of investment in equity security measured at fair value with change in fair value recognized in net income (FV-NI).

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Fair value as of the balance sheet date of interest rate derivative assets, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as assets.

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Fair value as of the balance sheet date of interest rate derivative liabilities, which includes all such derivative instruments in hedging and nonhedging relationships that are recognized as liabilities.

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

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Fair value of financial and nonfinancial obligations.

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