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v2.4.1.9

Stockholders' Equity Stockholders' Equity (Details) (USD $) In Millions, except Share data, unless otherwise specified | 3 Months Ended |  |
--- | --- | --- | ---
Mar. 31, 2015 | Mar. 31, 2014 | Dec. 31, 2014 | Dec. 31, 2013
Schedule of Capitalization, Equity [Line Items] |  |  |  |
Retained earnings | $ 478.5 us-gaap_RetainedEarningsAccumulatedDeficit |  | $ 486.9 us-gaap_RetainedEarningsAccumulatedDeficit |
Noncontrolling interest |  |  | 0 us-gaap_MinorityInterest |
Net Income (Loss) Attributable to Noncontrolling Interest, Other | 0 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest | 3.9 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest |  |
Authorized capitalization of common stock (in shares) | 300,000,000 us-gaap_CommonStockSharesAuthorized |  | 300,000,000 us-gaap_CommonStockSharesAuthorized |
Par value of common stock (in dollars per share) | $ 0.01 us-gaap_CommonStockParOrStatedValuePerShare |  |  |
Authorized capitalization of preferred stock (in shares) | 3,500,000 us-gaap_PreferredStockSharesAuthorized |  |  |
Par value of preferred stock per share (in dollars per share) | $ 0.01 us-gaap_PreferredStockParOrStatedValuePerShare |  |  |
Number of shares authorized to be repurchased (in shares) | 10,000,000 us-gaap_StockRepurchaseProgramNumberOfSharesAuthorizedToBeRepurchased |  |  |
Aggregate number of shares repurchased (in shares) | 7,600,000 us-gaap_TreasuryStockSharesAcquired |  |  |
Aggregate cost of shares repurchased | 49.8 us-gaap_TreasuryStockValueAcquiredCostMethod |  |  |
Retained Earnings |  |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |  |
Retained earnings | 478.5 us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 344.4 us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 486.9 us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | 353.2 us-gaap_RetainedEarningsAccumulatedDeficit / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember
Net Income (Loss) Attributable to Parent | (8.4)us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember | (8.8)us-gaap_NetIncomeLoss / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |
Noncontrolling Interest, Decrease from Deconsolidation |  | 0 us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation / us-gaap_StatementEquityComponentsAxis = us-gaap_RetainedEarningsMember |  |
Noncontrolling Interest |  |  |  |
Schedule of Capitalization, Equity [Line Items] |  |  |  |
Noncontrolling interest | 0 us-gaap_MinorityInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 0 us-gaap_MinorityInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 0 us-gaap_MinorityInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 6.8 us-gaap_MinorityInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember
Net Income (Loss) Attributable to Noncontrolling Interest, Other | 0 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember | 3.9 us-gaap_NetIncomeLossAttributableToNoncontrollingInterest / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |  |
Noncontrolling Interest, Decrease from Deconsolidation |  | $ (10.7)us-gaap_NoncontrollingInterestDecreaseFromDeconsolidation / us-gaap_StatementEquityComponentsAxis = us-gaap_NoncontrollingInterestMember |  |

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