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SUPPLEMENTAL CASH FLOW INFORMATION - SUPPLEMENTAL INFORMATION (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Supplemental cash flow information
Cash (paid) for interest, net of amount capitalized	$ (278.1)	$ (258.2)
Cash (paid) received for income taxes, net	(55.9)	7.3
Significant non-cash transactions
Accounts payable related to construction costs	71.9	172.7
Portion of Bostco real estate holdings sale financed with note receivable	$ 0.0	$ 7.0

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Future cash outflow to pay for purchases of fixed assets that have occurred.

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The amount of cash paid during the current period to foreign, federal, state, and local authorities as taxes on income, net of any cash received during the current period as refunds for the overpayment of taxes.

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