DEBT - Revolving Credit Agreements (Details) - USD ($)	1 Months Ended			9 Months Ended
	May 31, 2024	Jun. 30, 2023	Jun. 30, 2021	Sep. 30, 2024
Term Loan
Line of Credit Facility [Line Items]
Actual debt to capitalization percentage				42.30%
Revolving credit facility
Line of Credit Facility [Line Items]
Debt to capitalization percentage, maximum				60.00%
Outstanding borrowings				$ 0
Uncommitted incremental loan facility				$ 750,000,000
Revolving credit facility | 5-year unsecured revolving credit agreement June 2023
Line of Credit Facility [Line Items]
Debt instrument term (in years)		5 years		5 years
Maximum borrowing capacity	$ 2,642,000,000	$ 2,500,000,000
Increase commitments	$ 142,000,000
Basis spread on variable rate (percent)				1.14%
Facility fee (percent)				0.11%
Remaining borrowing capacity				$ 2,624,000,000
Revolving credit facility | 5-year unsecured revolving credit agreement June 2023 | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)				0.92%
Facility fee (percent)				0.08%
Revolving credit facility | 5-year unsecured revolving credit agreement June 2023 | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)				1.30%
Facility fee (percent)				0.20%
Revolving credit facility | 5-year unsecured revolving credit agreement June 2021
Line of Credit Facility [Line Items]
Debt instrument term (in years)			5 years
Maximum borrowing capacity			$ 2,500,000,000
Revolving credit facility | 364-day unsecured revolving credit agreement May 2024
Line of Credit Facility [Line Items]
Debt instrument term (in years)	364 days			364 days
Maximum borrowing capacity	$ 2,100,000,000
Basis spread on variable rate (percent)				1.16%
Facility fee (percent)				0.09%
Remaining borrowing capacity				$ 2,100,000,000
Revolving credit facility | 364-day unsecured revolving credit agreement May 2024 | Minimum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)				0.94%
Facility fee (percent)				0.06%
Revolving credit facility | 364-day unsecured revolving credit agreement May 2024 | Maximum
Line of Credit Facility [Line Items]
Basis spread on variable rate (percent)				1.35%
Facility fee (percent)				0.15%
Revolving credit facility | 364-day unsecured revolving credit agreement June 2023
Line of Credit Facility [Line Items]
Debt instrument term (in years)		364 days
Maximum borrowing capacity		$ 1,500,000,000
Letter of credit
Line of Credit Facility [Line Items]
Outstanding borrowings				$ 18,000,000