FAIR VALUE MEASUREMENTS (Recognized Assets and Liabilities at Fair Value) (Details) - USD ($) $ in Millions	Mar. 31, 2020	Dec. 31, 2019
Significant Unobservable Inputs, Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Contingent consideration	$ 6
Recurring Basis
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	52	$ 59
Cash surrender value of life insurance policies	36	43
Available-for-sale debt securities	12	12
Total assets	141	114
Deferred compensation liabilities	95	110
Contingent consideration	6	7
Total liabilities	101	145
Redeemable noncontrolling interest	76	76
Recurring Basis | Fixed-to-variable interest rate swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed-to-variable interest rate swaps	41
Derivative liability		28
Recurring Basis | Quoted Prices in Active Markets for Identical Assets / Liabilities, Level 1
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	52	59
Cash surrender value of life insurance policies	0	0
Available-for-sale debt securities	0	0
Total assets	52	59
Deferred compensation liabilities	0	0
Contingent consideration	0	0
Total liabilities	0	0
Redeemable noncontrolling interest	0	0
Recurring Basis | Quoted Prices in Active Markets for Identical Assets / Liabilities, Level 1 | Fixed-to-variable interest rate swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Derivative liability		0
Recurring Basis | Significant Other Observable Inputs, Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Cash surrender value of life insurance policies	36	43
Available-for-sale debt securities	0	0
Total assets	77	43
Deferred compensation liabilities	95	110
Contingent consideration	0	0
Total liabilities	95	138
Recurring Basis | Significant Other Observable Inputs, Level 2 | Fixed-to-variable interest rate swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed-to-variable interest rate swaps	41
Derivative liability		28
Recurring Basis | Significant Unobservable Inputs, Level 3
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Trading securities	0	0
Cash surrender value of life insurance policies	0	0
Available-for-sale debt securities	12	12
Total assets	12	12
Deferred compensation liabilities	0	0
Contingent consideration	6	7
Total liabilities	6	7
Redeemable noncontrolling interest	76	76
Recurring Basis | Significant Unobservable Inputs, Level 3 | Fixed-to-variable interest rate swaps
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Fixed-to-variable interest rate swaps	$ 0
Derivative liability		$ 0