USE OF DERIVATIVES, OFFSETTING DISCLOSURES AND CHANGES IN OTHER COMPREHENSIVE INCOME BY COMPONENT - Schedule of Swap Agreements Expiration Period and Characteristics (Details) $ in Thousands	Sep. 30, 2020 USD ($)
Notional Disclosures [Abstract]
Swap Notional Amounts	$ 4,000,000
Interest Rate SWAP Currently-Paying Contracts Expiring Second Quarter 2022 [Member]
Notional Disclosures [Abstract]
Swap Notional Amounts	$ 400,000
Average Fixed Rates	0.02%
Interest Rate SWAP Currently-Paying Contracts Expiring Third Quarter 2021 [Member]
Notional Disclosures [Abstract]
Swap Notional Amounts	$ 1,900,000
Average Fixed Rates	1.15%
Interest Rate SWAP Currently-Paying Contracts Expiring Third Quarter 2023 [Member]
Notional Disclosures [Abstract]
Swap Notional Amounts	$ 100,000
Average Fixed Rates	0.03%
Interest Rate SWAP Currently-Paying Contracts Expiring Third Quarter 2022 [Member]
Notional Disclosures [Abstract]
Swap Notional Amounts	$ 1,200,000
Average Fixed Rates	0.01%
Interest Rate SWAP Currently-Paying Contracts Expiring First Quarter 2022 [Member]
Notional Disclosures [Abstract]
Swap Notional Amounts	$ 400,000
Average Fixed Rates	1.37%