Mezzanine Equity (Sensitivity Analysis Of Fair Value Of Redeemable Noncontrolling Interests Using Discount And Terminal Growth Rates) (Details) (USD $) In Millions, unless otherwise specified	Sep. 30, 2013
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Discount rate assumed in determining fair value	12.96%
Terminal growth rate assumed in determining fair value	2.00%
Rate 12.71% Discount Rate [Member] | Rate 1.75% Terminal Growth Rates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of redeemable noncontrolling interests	$ 207.7
Discount rate assumed in determining fair value	12.71%
Terminal growth rate assumed in determining fair value	1.75%
Rate 12.71% Discount Rate [Member] | Rate 2.00% Terminal Growth Rates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of redeemable noncontrolling interests	210.2
Discount rate assumed in determining fair value	12.71%
Terminal growth rate assumed in determining fair value	2.00%
Rate 12.71% Discount Rate [Member] | Rate 2.25% Terminal Growth Rates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of redeemable noncontrolling interests	212.8
Discount rate assumed in determining fair value	12.71%
Terminal growth rate assumed in determining fair value	2.25%
Rate 12.96% Discount Rate [Member] | Rate 1.75% Terminal Growth Rates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of redeemable noncontrolling interests	201.3
Discount rate assumed in determining fair value	12.96%
Terminal growth rate assumed in determining fair value	1.75%
Rate 12.96% Discount Rate [Member] | Rate 2.00% Terminal Growth Rates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of redeemable noncontrolling interests	203.6
Discount rate assumed in determining fair value	12.96%
Terminal growth rate assumed in determining fair value	2.00%
Rate 12.96% Discount Rate [Member] | Rate 2.25% Terminal Growth Rates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of redeemable noncontrolling interests	206.1
Discount rate assumed in determining fair value	12.96%
Terminal growth rate assumed in determining fair value	2.25%
Rate 13.21% Discount Rate [Member] | Rate 1.75% Terminal Growth Rates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of redeemable noncontrolling interests	195.1
Discount rate assumed in determining fair value	13.21%
Terminal growth rate assumed in determining fair value	1.75%
Rate 13.21% Discount Rate [Member] | Rate 2.00% Terminal Growth Rates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of redeemable noncontrolling interests	197.3
Discount rate assumed in determining fair value	13.21%
Terminal growth rate assumed in determining fair value	2.00%
Rate 13.21% Discount Rate [Member] | Rate 2.25% Terminal Growth Rates [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair value of redeemable noncontrolling interests	$ 199.6
Discount rate assumed in determining fair value	13.21%
Terminal growth rate assumed in determining fair value	2.25%