Statement of Cash Flows (Details) (USD $)	3 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Dec. 31, 2014	Dec. 31, 2013
Accrued capital expenditures	$ 84,100,000	$ 17,600,000	$ 56,200,000	$ 16,100,000
Notes Payable		0	7,500,000	0
Facility lease obligation recognized during the period	10,800,000	19,400,000
Warrant Transactions [Member]
Accounts Payable, Other			59,800,000
Other Liabilities, Fair Value Disclosure	$ 0	$ 0	$ 87,500,000	$ 0