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LEASES AND OTHER COMMITMENTS Commitments (Details)
$ in Millions
 12 Months Ended
Dec. 31, 2019
USD ($)
Other Commitments [Line Items]  
Other Commitment, Due in Next Twelve Months $ 828
Other Commitment, Due in Second Year 955
Other Commitment, Due in Third Year 1,143
Other Commitment, Due in Fourth Year 1,199
Other Commitment, Due in Fifth Year 580
Other Commitment, Due after Fifth Year 7,824
Other Commitment $ 12,529
Unrecorded Unconditional Purchase Obligation, Term 30 years
Guarantor Obligations, Term P30Y
Guarantor Obligations, Maximum Exposure, Undiscounted $ 35
Debt Securities [Member]  
Other Commitments [Line Items]  
Other Commitment, Due in Next Twelve Months 0
Other Commitment, Due in Second Year 483
Other Commitment, Due in Third Year 741
Other Commitment, Due in Fourth Year 840
Other Commitment, Due in Fifth Year 240
Other Commitment, Due after Fifth Year 3,307
Other Commitment 5,611
Revolving Credit Facility [Member]  
Other Commitments [Line Items]  
Other Commitment, Due in Next Twelve Months 171
Other Commitment, Due in Second Year 0
Other Commitment, Due in Third Year 0
Other Commitment, Due in Fourth Year 0
Other Commitment, Due in Fifth Year 0
Other Commitment, Due after Fifth Year 0
Other Commitment 171
Interest payable [Member]  
Other Commitments [Line Items]  
Other Commitment, Due in Next Twelve Months 173
Other Commitment, Due in Second Year 186
Other Commitment, Due in Third Year 175
Other Commitment, Due in Fourth Year 156
Other Commitment, Due in Fifth Year 137
Other Commitment, Due after Fifth Year 1,414
Other Commitment 2,241
Obligations [Member]  
Other Commitments [Line Items]  
Other Commitment, Due in Next Twelve Months 181
Other Commitment, Due in Second Year 156
Other Commitment, Due in Third Year 102
Other Commitment, Due in Fourth Year 91
Other Commitment, Due in Fifth Year 100
Other Commitment, Due after Fifth Year 1,967
Other Commitment 2,597
Operating leases [Member]  
Other Commitments [Line Items]  
Other Commitment, Due in Next Twelve Months 62
Other Commitment, Due in Second Year 49
Other Commitment, Due in Third Year 38
Other Commitment, Due in Fourth Year 25
Other Commitment, Due in Fifth Year 14
Other Commitment, Due after Fifth Year 30
Other Commitment 218
Other Liabilities [Member]  
Other Commitments [Line Items]  
Other Commitment, Due in Next Twelve Months 241
Other Commitment, Due in Second Year 81
Other Commitment, Due in Third Year 87
Other Commitment, Due in Fourth Year 87
Other Commitment, Due in Fifth Year 89
Other Commitment, Due after Fifth Year 1,106
Other Commitment $ 1,691