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LONG-TERM DEBT AND LINE OF CREDIT Additional Information (Details) - USD ($)
$ in Millions
6 Months Ended
Jun. 30, 2019
Jun. 30, 2018
Dec. 31, 2018
Debt Instrument [Line Items]      
Proceeds from debt, net of issuance costs $ 739 $ 0  
Pretax charge related to early extinguishment of debt 12    
Revolving line of credit, outstanding balance 140   $ 425
Line of credit, maximum borrowing capacity $ 1,500    
Line of credit expiration date Mar. 31, 2022    
4.00 percent due 2029      
Debt Instrument [Line Items]      
Debt issued $ 750    
Debt instrument, interest rate, stated percentage 4.00%    
Proceeds from debt, net of issuance costs $ 739    
7.38 percent due 2019      
Debt Instrument [Line Items]      
Debt instrument, interest rate, stated percentage 7.38%    
Repayments of debt $ 500