SUPPLEMENTAL CASH FLOW & OTHER DATA (Schedule) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Supplemental Cash Flow Elements [Abstract]
Depreciation expense	$ 76	$ 62	$ 225	$ 186
Amortization expense	25	27	77	77
Depreciation and amortization expense	101	89	302	263
Interest expense	(38)	(42)	(114)	(126)
Interest income	0	0	0	2
Interest expense, net	(38)	(42)	(114)	(124)
Interest paid	33	33	111	136
Income taxes paid	187	148	522	168
Accounts payable associated with capital expenditures	24	55	24	55
Dividends payable	77	76	77	76
Fair value of assets acquired	20	126	254	377
Fair value of liabilities assumed	0	(9)	(3)	(29)
Fair value of net assets acquired	20	117	251	348
Merger consideration receivable/payable	0	2	0	2
Cash paid for business acquisitions	20	119	251	350
Less: Cash acquired	0	18	0	21
Business acquisitions, net of cash acquired	20	101	251	329
Leases:
Leased assets obtained in exchange for new operating lease liabilities	$ 46	$ 40	$ 115	$ 119