Schedule I - CONDENSED BALANCE SHEETS (Details) (USD $) In Millions, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 31, 2009
Assets
Cash and cash equivalents	$ 1,757.5	$ 891.2	$ 971.1	$ 902.1
Receivables, less allowance for doubtful accounts	580.5	488.4
Prepayments and other current assets	150.0	160.4
Intercompany receivables	0	0
Total current assets	3,493.6	1,837.2
Investments in subsidiaries	0	0
Deferred charges and other	720.6	746.2
Intercompany receivables	0	0
Total assets	27,998.1	28,515.6
Liabilities and Stockholders’ (Deficit)/Equity
Accounts payable	376.2	290.1
Accrued expenses	1,094.7	1,067.4
Intercompany payables	0	0
Total current liabilities	2,588.3	1,602.8
Accumulated losses of subsidiaries in excess of investment	0
Deferred credits and other	823.0	901.7
Intercompany payables	0	0
Total liabilities	28,329.7	27,462.2
Total stockholdes (deficit)/equity	(411.7)	1,006.7
Total liabilities and stockholders’(deficit)/ equity	27,998.1	28,515.6
Parent Company [Member]
Assets
Cash and cash equivalents	7.4	3.9	136.0	122.7
Receivables, less allowance for doubtful accounts	0.1	0
Prepayments and other current assets	5.0	0
Intercompany receivables	29.6	15.7
Total current assets	42.1	19.6
Investments in subsidiaries	0	535.8
Deferred charges and other	7.5	5.0
Intercompany receivables	563.1	469.0
Total assets	612.7	1,029.4
Liabilities and Stockholders’ (Deficit)/Equity
Accounts payable	3.9	0.2
Accrued expenses	3.7	7.5
Intercompany payables	15.9	15.0
Total current liabilities	23.5	22.7
Accumulated losses of subsidiaries in excess of investment	925.4	0
Deferred credits and other	4.1	0
Intercompany payables	55.0	0
Total liabilities	1,008.0	22.7
Total stockholdes (deficit)/equity	(395.3)	1,006.7
Total liabilities and stockholders’(deficit)/ equity	$ 612.7	$ 1,029.4