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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

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- Definition 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. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (b) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 820 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147482106/820-10-50-2 + Details
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