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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
Sep. 30, 2024
Dec. 31, 2023
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Total $ 2,028 $ 1,790
HTM debt securities 279 53
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 622 599
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 553 495
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 105 114
Level Two—Significant Other Observable Inputs | Time deposits    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Debt securities, available-for-sale 65 36
Level Two—Significant Other Observable Inputs | U.S. government obligations    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Debt securities, available-for-sale 324 250
Level Two—Significant Other Observable Inputs | U.S. government agencies    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Debt securities, available-for-sale 24 37
Level Two—Significant Other Observable Inputs | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Debt securities, available-for-sale 274 212
Level Two—Significant Other Observable Inputs | Mortgage-backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Debt securities, available-for-sale 26 19
Level Two—Significant Other Observable Inputs | Asset-backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Debt securities, available-for-sale 31 24
Level Two—Significant Other Observable Inputs | Municipal and provincial notes and bonds    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Debt securities, available-for-sale 4 4
Cash and cash equivalents    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Total 646 599
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 622 599
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    
Debt securities, available-for-sale 24 0
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    
Debt securities, available-for-sale 0 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    
Debt securities, available-for-sale 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    
Debt securities, available-for-sale 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    
Debt securities, available-for-sale 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    
Debt securities, available-for-sale 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    
Debt securities, available-for-sale 0 0
Short-term investments    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Total 39 15
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    
Debt securities, available-for-sale 13 10
Short-term investments | Level Two—Significant Other Observable Inputs | U.S. government obligations    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Debt securities, available-for-sale 6 0
Short-term investments | Level Two—Significant Other Observable Inputs | U.S. government agencies    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Debt securities, available-for-sale 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    
Debt securities, available-for-sale 20 5
Short-term investments | Level Two—Significant Other Observable Inputs | Mortgage-backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Debt securities, available-for-sale 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    
Debt securities, available-for-sale 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    
Debt securities, available-for-sale 0 0
Other assets    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Total 1,343 1,176
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 553 495
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 105 114
Other assets | Level Two—Significant Other Observable Inputs | Time deposits    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Debt securities, available-for-sale 28 26
Other assets | Level Two—Significant Other Observable Inputs | U.S. government obligations    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Debt securities, available-for-sale 318 250
Other assets | Level Two—Significant Other Observable Inputs | U.S. government agencies    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Debt securities, available-for-sale 24 37
Other assets | Level Two—Significant Other Observable Inputs | Corporate debt securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Debt securities, available-for-sale 254 207
Other assets | Level Two—Significant Other Observable Inputs | Mortgage-backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Debt securities, available-for-sale 26 19
Other assets | Level Two—Significant Other Observable Inputs | Asset-backed securities    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis    
Debt securities, available-for-sale 31 24
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    
Debt securities, available-for-sale $ 4 $ 4