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ACCOUNTS RECEIVABLE AND OTHER - Undiscounted Lease Payments (Details)
$ in Millions
Dec. 31, 2020
USD ($)
Disclosure Of Maturity Analysis Of Operating And Finance Lease Payments [Line Items]  
Finance lease receivable $ 858
Operating lease receivable 3,138
Total lease receivable 3,996
Less than 1 year  
Disclosure Of Maturity Analysis Of Operating And Finance Lease Payments [Line Items]  
Finance lease receivable 62
Operating lease receivable 396
Total lease receivable 458
1-2 years  
Disclosure Of Maturity Analysis Of Operating And Finance Lease Payments [Line Items]  
Finance lease receivable 61
Operating lease receivable 384
Total lease receivable 445
2-3 years  
Disclosure Of Maturity Analysis Of Operating And Finance Lease Payments [Line Items]  
Finance lease receivable 61
Operating lease receivable 318
Total lease receivable 379
3-4 years  
Disclosure Of Maturity Analysis Of Operating And Finance Lease Payments [Line Items]  
Finance lease receivable 60
Operating lease receivable 295
Total lease receivable 355
4-5 years  
Disclosure Of Maturity Analysis Of Operating And Finance Lease Payments [Line Items]  
Finance lease receivable 59
Operating lease receivable 271
Total lease receivable 330
5 plus years  
Disclosure Of Maturity Analysis Of Operating And Finance Lease Payments [Line Items]  
Finance lease receivable 555
Operating lease receivable 1,474
Total lease receivable $ 2,029