FINANCIAL INSTRUMENTS - Derivatives (Details) $ in Millions	Jun. 30, 2022 USD ($)	Dec. 31, 2021 USD ($) EUR (€)
Disclosure of detailed information about financial instruments [line items]
Fair value of financial assets	$ 7,004	$ 7,068
Fair value of financial liabilities	$ (58,228)	$ (62,406)
Cash flow hedges \| Interest rate caps of US$ LIBOR debt
Disclosure of detailed information about financial instruments [line items]
Notional	6,764	9,590
Fair value of financial assets	$ 14	$ 0
Cash flow hedges \| Interest rate caps of US$ LIBOR debt \| Bottom of range
Disclosure of detailed information about financial instruments [line items]
Rates	2.50%	2.50%
Cash flow hedges \| Interest rate caps of US$ LIBOR debt \| Top of range
Disclosure of detailed information about financial instruments [line items]
Rates	490.00%	500.00%
Cash flow hedges \| Interest rate swaps of US$ LIBOR debt
Disclosure of detailed information about financial instruments [line items]
Notional	130	2,130
Fair value of financial assets	$ 1
Fair value of financial liabilities		$ (50)
Cash flow hedges \| Interest rate swaps of US$ LIBOR debt \| Bottom of range
Disclosure of detailed information about financial instruments [line items]
Rates		1.00%
Cash flow hedges \| Interest rate swaps of US$ LIBOR debt \| Top of range
Disclosure of detailed information about financial instruments [line items]
Rates	140.00%	260.00%
Cash flow hedges \| Interest rate caps of US$ SOFR debt
Disclosure of detailed information about financial instruments [line items]
Notional	373
Fair value of financial assets	$ 2
Cash flow hedges \| Interest rate caps of US$ SOFR debt \| Top of range
Disclosure of detailed information about financial instruments [line items]
Rates	380.00%
Cash flow hedges \| Interest rate caps of US$ SOFR debt
Disclosure of detailed information about financial instruments [line items]
Notional		2,301
Fair value of financial assets		$ 0
Cash flow hedges \| Interest rate caps of US$ SOFR debt \| Bottom of range
Disclosure of detailed information about financial instruments [line items]
Rates		1.00%
Cash flow hedges \| Interest rate caps of US$ SOFR debt \| Top of range
Disclosure of detailed information about financial instruments [line items]
Rates		250.00%
Cash flow hedges \| Interest rate caps of £ SONIA debt
Disclosure of detailed information about financial instruments [line items]
Notional	2,352	974
Rates		2.00%
Fair value of financial assets	$ 13	$ 5
Cash flow hedges \| Interest rate caps of £ SONIA debt \| Bottom of range
Disclosure of detailed information about financial instruments [line items]
Rates	1.00%
Cash flow hedges \| Interest rate caps of £ SONIA debt \| Top of range
Disclosure of detailed information about financial instruments [line items]
Rates	2.50%
Cash flow hedges \| Interest rate caps of € EURIBOR debt
Disclosure of detailed information about financial instruments [line items]
Notional	94	102
Rates	1.30%	1.30%
Fair value of financial assets	$ 0	$ 0
Cash flow hedges \| Interest rate caps of C$ LIBOR debt
Disclosure of detailed information about financial instruments [line items]
Notional	186	240
Rates	2.00%
Fair value of financial assets	$ 0	$ 0
Cash flow hedges \| Interest rate caps of C$ LIBOR debt \| Top of range
Disclosure of detailed information about financial instruments [line items]
Rates		2.00%
Cash flow hedges \| Interest rate swaps of A$ BBSW/BBSY debt
Disclosure of detailed information about financial instruments [line items]
Notional	401	422,000,000
Fair value of financial assets	$ 14	$ 0
Cash flow hedges \| Interest rate swaps of A$ BBSW/BBSY debt \| Bottom of range
Disclosure of detailed information about financial instruments [line items]
Rates	0.80%	0.80%
Cash flow hedges \| Interest rate swaps of A$ BBSW/BBSY debt \| Top of range
Disclosure of detailed information about financial instruments [line items]
Rates	1.60%	1.60%

The average rate of a hedging instrument. [Refer: Hedging instruments [member]]

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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with members defined in one or many axes of the table.

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The amount of assets that are: (a) cash; (b) an equity instrument of another entity; (c) a contractual right: (i) to receive cash or another financial asset from another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially favourable to the entity; or (d) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to receive a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose the entity’s own equity instruments do not include puttable financial instruments classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. [Refer: Financial instruments, class [member]; Financial liabilities]

+ References

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- Definition

The amount of liabilities that are: (a) a contractual obligation: (i) to deliver cash or another financial asset to another entity; or (ii) to exchange financial assets or financial liabilities with another entity under conditions that are potentially unfavourable to the entity; or (b) a contract that will, or may be, settled in the entity’s own equity instruments and is: (i) a non-derivative for which the entity is, or may be, obliged to deliver a variable number of the entity’s own equity instruments; or (ii) a derivative that will, or may be, settled other than by the exchange of a fixed amount of cash or another financial asset for a fixed number of the entity’s own equity instruments. For this purpose, rights, options or warrants to acquire a fixed number of the entity’s own equity instruments for a fixed amount of any currency are equity instruments if the entity offers the rights, options or warrants pro rata to all of its existing owners of the same class of its own non-derivative equity instruments. Also, for those purposes the entity’s own equity instruments do not include puttable financial instruments that are classified as equity instruments in accordance with paragraphs 16A-16B of IAS 32, instruments that impose on the entity an obligation to deliver to another party a pro rata share of the net assets of the entity only on liquidation and are classified as equity instruments in accordance with paragraphs 16C-16D of IAS 32, or instruments that are contracts for the future receipt or delivery of the entity’s own equity instruments. As an exception, an instrument that meets the definition of a financial liability is classified as an equity instrument if it has all the features and meets the conditions in paragraphs 16A-16B or paragraphs 16C-16D of IAS 32. [Refer: Financial instruments, class [member]; Financial assets; Derivatives [member]]

+ References

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- Definition

The nominal amount of a hedging instrument. [Refer: Hedging instruments [member]]

+ References

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