1.0.0.3 false Condensed Consolidated Statements of Cash Flows (USD $) In Millions false 1 $ false false Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 Unit1 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 false 2 $ false false Shares Standard http://www.xbrl.org/2003/instance shares xbrli 0 Unit1 Divide http://www.xbrl.org/2003/iso4217 USD iso4217 http://www.xbrl.org/2003/instance shares xbrli 0 USD Standard http://www.xbrl.org/2003/iso4217 USD iso4217 0 7 Operating Activities 5 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperationsAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false No definition available. false 8 Net income 6 us-gaap_ProfitLoss us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 true true 574300000 574.3 false false 2 true true 855300000 855.3 false false No definition available. No authoritative reference available. false 9 Adjustments to reconcile net income to net cash provided by operating activities of continuing operations: 6 us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false No definition available. false 10 Depreciation expense 7 us-gaap_CostOfServicesDepreciation us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 149800000 149.8 false false 2 false true 139400000 139.4 false false No definition available. No authoritative reference available. false 11 Deferred income tax expense 7 us-gaap_DeferredIncomeTaxExpenseBenefit us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 28900000 28.9 false false 2 false true 16100000 16.1 false false No definition available. No authoritative reference available. false 12 Share-based compensation expense 7 us-gaap_ShareBasedCompensation us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 25100000 25.1 false false 2 false true 21100000 21.1 false false No definition available. No authoritative reference available. false 13 Amortization expense 7 us-gaap_OtherAmortizationOfDeferredCharges us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 23500000 23.5 false false 2 false true 24600000 24.6 false false No definition available. No authoritative reference available. false 14 Loss (income) from discontinued operations, net 7 us-gaap_DiscontinuedOperationIncomeLossFromDiscontinuedOperationDuringPhaseOutPeriodNetOfTax us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 16400000 16.4 false false 2 false true -25100000 -25.1 false false No definition available. No authoritative reference available. false 15 Loss on disposal of discontinued operations, net 7 us-gaap_DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 11800000 11.8 false false 2 false true 23500000 23.5 false false No definition available. No authoritative reference available. false 16 Other 7 us-gaap_AdjustmentsNoncashItemsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesOther us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 2900000 2.9 false false 2 false true -2200000 -2.2 false false No definition available. No authoritative reference available. false 17 Changes in operating assets and liabilities: 7 us-gaap_IncreaseDecreaseInOperatingCapitalAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false No definition available. false 18 Decrease (increase) in accounts receivable 8 us-gaap_IncreaseDecreaseInReceivables us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 154400000 154.4 false false 2 false true -86600000 -86.6 false false No definition available. No authoritative reference available. false 19 Decrease (increase) in trading securities 8 us-gaap_IncreaseDecreaseInTradingSecurities us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 3600000 3.6 false false 2 false true -73200000 -73.2 false false No definition available. No authoritative reference available. false 20 Increase in other assets 8 us-gaap_IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -76000000 -76.0 false false 2 false true -31200000 -31.2 false false No definition available. No authoritative reference available. false 21 Increase (decrease) in accounts payable and other liabilities 8 us-gaap_IncreaseDecreaseInOperatingLiabilities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 23500000 23.5 false false 2 false true -127900000 -127.9 false false No definition available. No authoritative reference available. true 22 Net cash provided by operating activities of continuing operations 6 us-gaap_NetCashProvidedByUsedInOperatingActivitiesContinuingOperations us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false true 938200000 938.2 false false 2 false true 733800000 733.8 false false No definition available. No authoritative reference available. true 23 Investing Activities 4 us-gaap_NetCashProvidedByUsedInInvestingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false No definition available. false 24 Additions to property and equipment 5 us-gaap_PaymentsToAcquirePropertyPlantAndEquipment us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -684700000 -684.7 false false 2 false true -653900000 -653.9 false false No definition available. No authoritative reference available. false 25 Proceeds from disposal of discontinued operations 5 us-gaap_CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 4900000 4.9 false false 2 false true 0 0 false false No definition available. No authoritative reference available. false 26 Proceeds from disposition of assets 5 us-gaap_ProceedsFromSaleOfPropertyPlantAndEquipment us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 1900000 1.9 false false 2 false true 5100000 5.1 false false No definition available. No authoritative reference available. false 27 Purchase of short-term investments 5 us-gaap_PaymentsToAcquireShortTermInvestments us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true 0 0 false false 2 false true -38400000 -38.4 false false No definition available. No authoritative reference available. true 28 Net cash used in investing activities 5 us-gaap_NetCashProvidedByUsedInInvestingActivities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -677900000 -677.9 false false 2 false true -687200000 -687.2 false false No definition available. No authoritative reference available. true 29 Financing Activities 4 us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract us-gaap true na duration string No definition available. false false false false false true false false false 1 false false 0 0 false false 2 false false 0 0 false false No definition available. false 30 Cash dividends paid 5 us-gaap_PaymentsOfDividendsCommonStock us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -10700000 -10.7 false false 2 false true -10700000 -10.7 false false No definition available. No authoritative reference available. false 31 Proceeds from exercise of stock options 5 us-gaap_ProceedsFromStockOptionsExercised us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 9000000 9.0 false false 2 false true 27300000 27.3 false false No definition available. No authoritative reference available. false 32 Reduction of long-term borrowings 5 us-gaap_RepaymentsOfLongTermDebt us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -8600000 -8.6 false false 2 false true -10500000 -10.5 false false No definition available. No authoritative reference available. false 33 Repurchase of common stock 5 us-gaap_PaymentsForRepurchaseOfCommonStock us-gaap true credit duration monetary No definition available. false false false false false false false false false 1 false true -6300000 -6.3 false false 2 false true -259500000 -259.5 false false No definition available. No authoritative reference available. false 34 Other 5 us-gaap_ProceedsFromPaymentsForOtherFinancingActivities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -5100000 -5.1 false false 2 false true 2100000 2.1 false false No definition available. No authoritative reference available. true 35 Net cash used in financing activities 5 us-gaap_NetCashProvidedByUsedInFinancingActivities us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -21700000 -21.7 false false 2 false true -251300000 -251.3 false false No definition available. No authoritative reference available. true 36 Effect of exchange rate changes on cash and cash equivalents 4 us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true 300000 0.3 false false 2 false true -7600000 -7.6 false false No definition available. No authoritative reference available. false 37 Net cash (used in) provided by operating activities of discontinued operations 4 us-gaap_CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations us-gaap true debit duration monetary No definition available. false false false false false false false false false 1 false true -11300000 -11.3 false false 2 false true 30400000 30.4 false false No definition available. No authoritative reference available. true 38 Increase (decrease) in cash and cash equivalents 4 us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease us-gaap true na duration monetary No definition available. false false false false false false false false false 1 false true 227600000 227.6 false false 2 false true -181900000 -181.9 false false No definition available. No authoritative reference available. false 39 Cash and cash equivalents, beginning of period 3 us-gaap_CashAndCashEquivalentsAtCarryingValue us-gaap true debit instant monetary No definition available. false false false false false false true false false 1 false true 789600000 789.6 false false 2 false true 629500000 629.5 false false No definition available. No authoritative reference available. false 40 Cash and cash equivalents, end of period 3 us-gaap_CashAndCashEquivalentsAtCarryingValue us-gaap true debit instant monetary No definition available. false false false false false false false true false 1 true true 1017200000 1017.2 false false 2 true true 447600000 447.6 false false No definition available. No authoritative reference available. false false 2 34 false HundredThousands UnKnown UnKnown false true