Fair Value Measurements - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - USD ($) $ in Millions	Mar. 31, 2022	Dec. 31, 2021
Foreign currency forward contracts
Derivatives:
Foreign currency forward contracts		$ 3
Recurring Basis
Investments:
Total assets	$ 1,905	1,335
Recurring Basis \| Foreign currency forward contracts
Derivatives:
Foreign currency forward contracts		3
Recurring Basis \| Cross-currency interest rate swaps
Derivatives:
Cross-currency interest rate swaps	3
Recurring Basis \| Money market funds
Cash equivalents:
Cash equivalents:	3	47
Recurring Basis \| Mutual funds
Cash equivalents:
Cash equivalents:	22	23
Recurring Basis \| Term deposits
Cash equivalents:
Cash equivalents:	950	153
Investments:
Investments:		200
Recurring Basis \| Equity investments
Investments:
Investments:	930	909
Recurring Basis \| Level 1
Investments:
Total assets	142	164
Recurring Basis \| Level 1 \| Foreign currency forward contracts
Derivatives:
Foreign currency forward contracts		0
Recurring Basis \| Level 1 \| Cross-currency interest rate swaps
Derivatives:
Cross-currency interest rate swaps	0
Recurring Basis \| Level 1 \| Money market funds
Cash equivalents:
Cash equivalents:	3	47
Recurring Basis \| Level 1 \| Mutual funds
Cash equivalents:
Cash equivalents:	22	23
Recurring Basis \| Level 1 \| Term deposits
Cash equivalents:
Cash equivalents:	0	0
Investments:
Investments:		0
Recurring Basis \| Level 1 \| Equity investments
Investments:
Investments:	117	94
Recurring Basis \| Level 2
Investments:
Total assets	950	356
Recurring Basis \| Level 2 \| Foreign currency forward contracts
Derivatives:
Foreign currency forward contracts		3
Recurring Basis \| Level 2 \| Cross-currency interest rate swaps
Derivatives:
Cross-currency interest rate swaps	3
Recurring Basis \| Level 2 \| Money market funds
Cash equivalents:
Cash equivalents:	0	0
Recurring Basis \| Level 2 \| Mutual funds
Cash equivalents:
Cash equivalents:	0	0
Recurring Basis \| Level 2 \| Term deposits
Cash equivalents:
Cash equivalents:	950	153
Investments:
Investments:		200
Recurring Basis \| Level 2 \| Equity investments
Investments:
Investments:	0	0
Recurring Basis \| Level 3
Investments:
Total assets	813	815
Recurring Basis \| Level 3 \| Foreign currency forward contracts
Derivatives:
Foreign currency forward contracts		0
Recurring Basis \| Level 3 \| Cross-currency interest rate swaps
Derivatives:
Cross-currency interest rate swaps	0
Recurring Basis \| Level 3 \| Money market funds
Cash equivalents:
Cash equivalents:	0	0
Recurring Basis \| Level 3 \| Mutual funds
Cash equivalents:
Cash equivalents:	0	0
Recurring Basis \| Level 3 \| Term deposits
Cash equivalents:
Cash equivalents:	0	0
Investments:
Investments:		0
Recurring Basis \| Level 3 \| Equity investments
Investments:
Investments:	$ 813	$ 815

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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-Publisher FASB
-Name Accounting Standards Codification
-Topic 820
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-Section 50
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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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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 815
-SubTopic 10
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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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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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-SubTopic 10
-Section 50
-Paragraph 2
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