Summary of Significant Accounting Policies Cash and Cash Equivalents (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011
Accounting Policies [Abstract]
Goodwill, Impairment Loss	$ 59.5
Restricted Cash, Noncurrent	50.0	0
Cash paid for interest, net of capitalized interest	156.7	105.1	90.5
Cash paid (received) for income taxes	77.9	30.0	(28.5)
Change in capital expenditure accrual balance	$ (25.2)	$ 88.5	$ 14.7