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DEBT AND EQUITY SECURITIES - Schedule of Assets and Liabilities Measured at Fair Value on a Recurring Basis (Details) - USD ($)
$ in Millions
Mar. 31, 2025
Dec. 31, 2024
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Total $ 2,580 $ 2,409
Level One—Quoted Prices in Active Markets for Identical Assets | Interest-bearing money market funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Cash equivalents 525 638
Level One—Quoted Prices in Active Markets for Identical Assets | Mutual funds and exchange-traded funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Cash equivalents 529 555
Level One—Quoted Prices in Active Markets for Identical Assets | Common shares    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Cash equivalents 173 164
Level Two—Significant Other Observable Inputs | Time deposits    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 642 404
Level Two—Significant Other Observable Inputs | U.S. government obligations    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 314 307
Level Two—Significant Other Observable Inputs | U.S. government agencies    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 20 21
Level Two—Significant Other Observable Inputs | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 307 249
Level Two—Significant Other Observable Inputs | Mortgage-backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 28 29
Level Two—Significant Other Observable Inputs | Asset-backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 38 38
Level Two—Significant Other Observable Inputs | Municipal and provincial notes and bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 4 4
Cash and cash equivalents    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Total 1,135 658
Cash and cash equivalents | Level One—Quoted Prices in Active Markets for Identical Assets | Interest-bearing money market funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Cash equivalents 525 638
Cash and cash equivalents | Level One—Quoted Prices in Active Markets for Identical Assets | Mutual funds and exchange-traded funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Cash equivalents 0 0
Cash and cash equivalents | Level One—Quoted Prices in Active Markets for Identical Assets | Common shares    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Cash equivalents 0 0
Cash and cash equivalents | Level Two—Significant Other Observable Inputs | Time deposits    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 605 20
Cash and cash equivalents | Level Two—Significant Other Observable Inputs | U.S. government obligations    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 5 0
Cash and cash equivalents | Level Two—Significant Other Observable Inputs | U.S. government agencies    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 0 0
Cash and cash equivalents | Level Two—Significant Other Observable Inputs | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 0 0
Cash and cash equivalents | Level Two—Significant Other Observable Inputs | Mortgage-backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 0 0
Cash and cash equivalents | Level Two—Significant Other Observable Inputs | Asset-backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 0 0
Cash and cash equivalents | Level Two—Significant Other Observable Inputs | Municipal and provincial notes and bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 0 0
Short-term investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Total 70 372
Short-term investments | Level One—Quoted Prices in Active Markets for Identical Assets | Interest-bearing money market funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Cash equivalents 0 0
Short-term investments | Level One—Quoted Prices in Active Markets for Identical Assets | Mutual funds and exchange-traded funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Cash equivalents 0 0
Short-term investments | Level One—Quoted Prices in Active Markets for Identical Assets | Common shares    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Cash equivalents 0 0
Short-term investments | Level Two—Significant Other Observable Inputs | Time deposits    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 6 355
Short-term investments | Level Two—Significant Other Observable Inputs | U.S. government obligations    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 22 5
Short-term investments | Level Two—Significant Other Observable Inputs | U.S. government agencies    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 0 0
Short-term investments | Level Two—Significant Other Observable Inputs | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 42 12
Short-term investments | Level Two—Significant Other Observable Inputs | Mortgage-backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 0 0
Short-term investments | Level Two—Significant Other Observable Inputs | Asset-backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 0 0
Short-term investments | Level Two—Significant Other Observable Inputs | Municipal and provincial notes and bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 0 0
Other assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Total 1,375 1,379
Other assets | Level One—Quoted Prices in Active Markets for Identical Assets | Interest-bearing money market funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Cash equivalents 0 0
Other assets | Level One—Quoted Prices in Active Markets for Identical Assets | Mutual funds and exchange-traded funds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Cash equivalents 529 555
Other assets | Level One—Quoted Prices in Active Markets for Identical Assets | Common shares    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Cash equivalents 173 164
Other assets | Level Two—Significant Other Observable Inputs | Time deposits    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 31 29
Other assets | Level Two—Significant Other Observable Inputs | U.S. government obligations    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 287 302
Other assets | Level Two—Significant Other Observable Inputs | U.S. government agencies    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 20 21
Other assets | Level Two—Significant Other Observable Inputs | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 265 237
Other assets | Level Two—Significant Other Observable Inputs | Mortgage-backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 28 29
Other assets | Level Two—Significant Other Observable Inputs | Asset-backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost 38 38
Other assets | Level Two—Significant Other Observable Inputs | Municipal and provincial notes and bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Amortized cost $ 4 $ 4