SUPPLEMENTAL CASH FLOW & OTHER DATA (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2019	Mar. 31, 2018
Supplemental Cash Flow Elements [Abstract]
Depreciation expense	$ 60	$ 52
Amortization expense	24	22
Depreciation and amortization expense	84	74
Interest expense	(45)	(41)
Interest income	1	0
Interest expense, net	(44)	(41)
Interest paid	28	49
Income taxes paid	3	2
Accounts payable associated with capital expenditures	13	16
Dividends payable	72	66
Fair value of assets acquired	61	148
Fair value of liabilities assumed	0	(1)
Fair value of net assets acquired	61	147
Merger consideration paid (payable), net	(5)	(12)
Cash paid for business acquisitions	56	135
Less: Cash acquired	0	5
Business acquisitions, net of cash acquired	56	$ 130
Leases:
Operating cash flows from operating leases	45
Operating cash flows from finance leases	1
Financing cash flows from finance leases	1
Leased assets obtained in exchange for new operating lease liabilities	$ 25