FAIR VALUE MEASUREMENTS - Investments (Details) - USD ($) $ in Millions	3 Months Ended
	Jun. 30, 2020	Mar. 31, 2020	Dec. 31, 2021	Dec. 31, 2020
Recurring Basis
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Estimated fair value of derivative assets			$ 13,315	$ 14,054
Recurring Basis | Level 3
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Estimated fair value of derivative assets			0	200
Investments in private companies, equity securities | Long-term Investments
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value of investment in equity securities of private companies			325	455
Grab | Long-term Investments
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Equity securities, noncurrent			301
Grab | Redeemable convertible preferred stock | Long-term Investments
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Debt securities, available-for-sale, unrealized gain (loss)	$ 20	$ (20)
Grab | Redeemable convertible preferred stock | Long-term Investments | Recurring Basis | Level 3
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Estimated fair value of derivative assets				200
Didi Chuxing | Long-term Investments
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Equity securities, noncurrent			$ 195
Didi Chuxing | Investments in private companies, equity securities | Long-term Investments
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Fair value of investment in equity securities of private companies		$ 400		$ 400