CASH FLOW INFORMATION (Reconciliation Of Capital Additions To Cash Paid For Capital Expenditures) (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018
Supplemental Cash Flow Information [Abstract]
Capital Expenditure, Discontinued Operations				$ 0.1
Capital Additions	$ 184.7	$ 92.6	$ 505.6	241.9
Capital Additions, Including Discontinued Operations				242.0
Non-cash accruals			26.1	42.2
Right-of-Use Assets - Finance Leases			29.3	7.6
Government grant rebate			(10.5)	(2.5)
Cash paid for capital expenditures including deposits			$ 460.7	$ 194.7