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COMMITMENTS AND CONTINGENCIES (Future Minimum Rental Receipts Under Operating Lease Agreements) (Details)
$ in Millions
Dec. 31, 2017
USD ($)
Operating Leases, Future Minimum Payments Receivable [Abstract]  
2018 $ 4,927
2019 4,683
2020 4,393
2021 3,957
2022 3,095
Thereafter 11,180
Total $ 32,235