Fair Value Measurements - Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Details) - Recurring Basis - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Investments:
Total assets	$ 731	$ 1,335
Cross-currency interest rate swaps
Derivatives:
Derivatives	24
Foreign currency forward contracts
Derivatives:
Derivatives		3
Derivatives:
Foreign currency forward contracts	6
Money market funds
Cash equivalents:
Cash equivalents:	4	47
Mutual funds
Cash equivalents:
Cash equivalents:		23
Term deposits
Cash equivalents:
Cash equivalents:	92	153
Investments:
Investments	53	200
Equity investments
Investments:
Investments	558	909
Level 1
Investments:
Total assets	82	164
Level 1 | Cross-currency interest rate swaps
Derivatives:
Derivatives	0
Level 1 | Foreign currency forward contracts
Derivatives:
Derivatives		0
Derivatives:
Foreign currency forward contracts	0
Level 1 | Money market funds
Cash equivalents:
Cash equivalents:	4	47
Level 1 | Mutual funds
Cash equivalents:
Cash equivalents:		23
Level 1 | Term deposits
Cash equivalents:
Cash equivalents:	0	0
Investments:
Investments	0	0
Level 1 | Equity investments
Investments:
Investments	78	94
Level 2
Investments:
Total assets	649	356
Level 2 | Cross-currency interest rate swaps
Derivatives:
Derivatives	24
Level 2 | Foreign currency forward contracts
Derivatives:
Derivatives		3
Derivatives:
Foreign currency forward contracts	6
Level 2 | Money market funds
Cash equivalents:
Cash equivalents:	0	0
Level 2 | Mutual funds
Cash equivalents:
Cash equivalents:		0
Level 2 | Term deposits
Cash equivalents:
Cash equivalents:	92	153
Investments:
Investments	53	200
Level 2 | Equity investments
Investments:
Investments	$ 480	0
Level 3
Investments:
Total assets		815
Level 3 | Foreign currency forward contracts
Derivatives:
Derivatives		0
Level 3 | Money market funds
Cash equivalents:
Cash equivalents:		0
Level 3 | Mutual funds
Cash equivalents:
Cash equivalents:		0
Level 3 | Term deposits
Cash equivalents:
Cash equivalents:		0
Investments:
Investments		0
Level 3 | Equity investments
Investments:
Investments		$ 815