Annual report pursuant to Section 13 and 15(d)

LEASES - Lease Cost (Details)

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LEASES - Lease Cost (Details)
$ in Millions
12 Months Ended
Dec. 31, 2019
USD ($)
Leases [Abstract]  
Amortization of assets $ 73
Interest on lease liabilities 19
Total finance lease costs 92
Variable lease costs 206
Short-term lease costs 1,122
Operating lease costs 643
Total lease costs $ 2,063