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SENIOR NOTES PAYABLE AND OTHER DEBT - Credit Facilities, Commercial Paper and Unsecured Term Loans (Details) $ in Millions	1 Months Ended	3 Months Ended	9 Months Ended
	Jun. 30, 2022 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2022 USD ($) period	Sep. 30, 2022 CAD ($)	Dec. 31, 2021 USD ($)
Debt instruments
Commercial paper program capacity		$ 1,000,000,000	$ 1,000,000,000
Commercial paper notes		377,400,000	377,400,000		$ 280,000,000
Unsecured debt \| Revolving Credit Facility
Debt instruments
Maximum borrowing capacity		2,750,000,000	$ 2,750,000,000
Additional periods \| period			2
Additional period term			6 months
Accordion feature of debt		3,750,000,000	$ 3,750,000,000
Remaining borrowing capacity		2,700,000,000	2,700,000,000
Fair value of amount outstanding		31,057,000	31,057,000		56,448,000
Letters of credit outstanding		15,600,000	$ 15,600,000
Unsecured debt \| Revolving Credit Facility \| LIBOR
Debt instruments
Variable interest rate			0.825%
Unsecured term loan due 2023
Debt instruments
Unsecured debt	$ 200,000,000	0	$ 0		200,000,000
Unsecured term loan due 2023 \| LIBOR
Debt instruments
Variable interest rate	0.90%
Unsecured term loan due 2027
Debt instruments
Unsecured debt	$ 500,000,000
Accordion feature limit	$ 1,250,000,000
Unsecured term loan due 2027 \| Secured Overnight Financing Rate (SOFR)
Debt instruments
Variable interest rate	0.95%
Unsecured Term Loan due 2025
Debt instruments
Unsecured debt		$ 361,637,000	$ 361,637,000	$ 500	$ 395,757,000
Unsecured Term Loan due 2025 \| Canadian Dollar Offered Rate (CDOR)
Debt instruments
Variable interest rate		0.90%