Supplemental Disclosure of Cash Flow Information (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2020	Sep. 30, 2019
Cash paid during the period for:
Interest (net of amount capitalized)	$ 108.7	$ 122.5
Non-cash adjustments:
Accounts payable and property, plant and equipment	34.2	62.5
Right-of-use assets obtained in exchange for lease obligations	$ 18.3	$ 18.2