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LEASES - Future Minimum Lease Commitments (Details)
$ in Millions
Jun. 30, 2019
USD ($)
Leases [Abstract]  
Total $ 1,242
Remainder of 2019 184
2020 191
2021 163
2022 128
2023 99
Thereafter 477
Less: imputed interest 174
Total, less imputed interest $ 1,068