CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (UNAUDITED) (in thousands) (Parenthetical) (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2014	Mar. 31, 2013
Statement of Cash Flows [Abstract]
Dividends, Common Stock	$ 3.4	$ 3.3
Capital expenditures incurred but not yet paid	$ 200.5	$ 202.8