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Affiliate Equity (Details) (USD $) In Millions, unless otherwise specified | 3 Months Ended
--- | ---
Mar. 31, 2012 | Mar. 31, 2011
Affiliate Equity |  |
Compensation expenses related to Affiliate equity | $ 6.3 | $ 5.2
Compensation expenses related to Affiliate equity, attributable to controlling interest | 2.2 | 3.5
Changes in redeemable non-controlling interests during the period |  |
Balance at the beginning of the period | 451.8 |
Issuance of Redeemable non-controlling interest | 7.0 |
Repurchase of Redeemable non-controlling interest | (11.2) |
Changes in redemption value | 62.0 |
Balance at the end of the period | 509.6 |
Effect of changes in the Company's ownership interest in its Affiliates on the controlling interest's equity |  |
Net income (controlling interest) | 37.4 | 39.1
Increase (decrease) in controlling interest paid-in capital from purchase and sales of Affiliate equity | (6.0) | 3.8
Change from Net income (controlling interest) and net transfers with non-controlling interests | $ 31.4 | $ 42.9

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- Definition The increase (decrease) in additional paid-in capital of the reporting entity from purchases and sales of Affiliate equity. + References No definition available. + Details
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