Quarterly report pursuant to Section 13 or 15(d)

RECENT ACCOUNTING PRONOUNCEMENTS - Narratives (Details)

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RECENT ACCOUNTING PRONOUNCEMENTS - Narratives (Details) - USD ($)
$ in Millions
Jun. 30, 2019
Jan. 01, 2019
Dec. 31, 2018
Error Corrections and Prior Period Adjustments Restatement [Line Items]      
Operating lease right-of-use assets $ 2,477   $ 0
Operating lease liability $ 2,513    
2016-02      
Error Corrections and Prior Period Adjustments Restatement [Line Items]      
Operating lease right-of-use assets   $ 2,650  
Operating lease liability   $ 2,700