Revisions of Condensed Consolidated Financial Statements Balance Sheet (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2013	Sep. 30, 2013	Dec. 31, 2012
Accounts Receivable, Net, Current	$ 1,204.0	$ 745.6	$ 989.3
Deferred Tax Assets, Net of Valuation Allowance, Current	23.0	10.6	36.9
Prepaid Expense and Other Assets, Current	47.1	57.1	58.3
Property, Plant and Equipment, Net	4,517.1	4,480.2	4,271.4
Accounts Payable, Current	691.4	472.3	579.3
Other Liabilities, Current	678.6	627.5	614.6
Deferred Tax Liabilities, Net, Noncurrent	980.2	962.3	923.0
Other Liabilities, Noncurrent	531.8	527.2	634.0
Retained Earnings (Accumulated Deficit)	1,397.9	1,308.3	1,227.9
Accumulated Other Comprehensive Income (Loss), Net of Tax	32.2	8.4	(37.3)
Stockholders' Equity Attributable to Noncontrolling Interest	1,109.1	1,055.4	1,107.6
Scenario, Previously Reported [Member]
Accounts Receivable, Net, Current			999.2
Deferred Tax Assets, Net of Valuation Allowance, Current			57.6
Prepaid Expense and Other Assets, Current			57.5
Property, Plant and Equipment, Net			4,270.8
Accounts Payable, Current			580.7
Other Liabilities, Current			616.8
Deferred Tax Liabilities, Net, Noncurrent			946.1
Other Liabilities, Noncurrent			629.8
Retained Earnings (Accumulated Deficit)			1,238.1
Accumulated Other Comprehensive Income (Loss), Net of Tax			(43.7)
Stockholders' Equity Attributable to Noncontrolling Interest			1,110.5
Restatement Adjustment [Member]
Accounts Receivable, Net, Current			(9.9)
Deferred Tax Assets, Net of Valuation Allowance, Current			(20.7)
Prepaid Expense and Other Assets, Current			0.8
Property, Plant and Equipment, Net			0.6
Accounts Payable, Current			(1.4)
Other Liabilities, Current			(2.2)
Deferred Tax Liabilities, Net, Noncurrent			(23.1)
Other Liabilities, Noncurrent			4.2
Retained Earnings (Accumulated Deficit)			(10.2)
Accumulated Other Comprehensive Income (Loss), Net of Tax			6.4
Stockholders' Equity Attributable to Noncontrolling Interest			$ (2.9)