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CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS (USD $)
In Thousands, unless otherwise specified
6 Months Ended
Jan. 31, 2015
Jan. 31, 2014
Operating Activities    
Net cash provided by operating activities $ 238,166us-gaap_NetCashProvidedByUsedInOperatingActivities $ 205,595us-gaap_NetCashProvidedByUsedInOperatingActivities
Investing Activities    
Capital expenditures (25,240)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment (34,663)us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Acquisition of businesses, net of cash acquired (1,741)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired (5,299)us-gaap_PaymentsToAcquireBusinessesNetOfCashAcquired
Purchases of retirement benefit assets (38,506)us-gaap_PaymentsToAcquireRestrictedInvestments (14,312)us-gaap_PaymentsToAcquireRestrictedInvestments
Proceeds from retirement benefit assets 40,913pll_ProceedsFromSaleAndMaturityOfRestrictedInvestments 19,946pll_ProceedsFromSaleAndMaturityOfRestrictedInvestments
Proceeds from sale of assets 2,200pll_ProceedsFromSaleOfNonstrategicAssetGroupOtherInvestmentsAndPropertyPlantAndEquipment 1,953pll_ProceedsFromSaleOfNonstrategicAssetGroupOtherInvestmentsAndPropertyPlantAndEquipment
Other (4,565)us-gaap_PaymentsForProceedsFromOtherInvestingActivities (3,278)us-gaap_PaymentsForProceedsFromOtherInvestingActivities
Net cash used by investing activities (26,939)us-gaap_NetCashProvidedByUsedInInvestingActivities (35,653)us-gaap_NetCashProvidedByUsedInInvestingActivities
Financing Activities    
Notes payable 299,853us-gaap_ProceedsFromRepaymentsOfShortTermDebt 134,963us-gaap_ProceedsFromRepaymentsOfShortTermDebt
Dividends paid (62,796)us-gaap_PaymentsOfDividendsCommonStock (58,408)us-gaap_PaymentsOfDividendsCommonStock
Repayments of short-term debt 0us-gaap_RepaymentsOfShortTermDebt (3,927)us-gaap_RepaymentsOfShortTermDebt
Repayments of long-term debt (280)us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities (375)us-gaap_RepaymentsOfLongTermDebtAndCapitalSecurities
Net proceeds from stock plans 8,169pll_Proceedsfromstockplansandpaymentsrelatedtotaxwithholdingforsharebasedcompensation 7,130pll_Proceedsfromstockplansandpaymentsrelatedtotaxwithholdingforsharebasedcompensation
Additions to deferred financing costs 1,535us-gaap_PaymentsOfDebtIssuanceCosts 0us-gaap_PaymentsOfDebtIssuanceCosts
Purchase of treasury stock (304,105)us-gaap_PaymentsForRepurchaseOfCommonStock (250,000)us-gaap_PaymentsForRepurchaseOfCommonStock
Excess tax benefits from stock-based compensation arrangements 2,475us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities 9,444us-gaap_ExcessTaxBenefitFromShareBasedCompensationFinancingActivities
Other (1,458)us-gaap_ProceedsFromPaymentsForOtherFinancingActivities 0us-gaap_ProceedsFromPaymentsForOtherFinancingActivities
Net cash used by financing activities (59,677)us-gaap_NetCashProvidedByUsedInFinancingActivities (161,173)us-gaap_NetCashProvidedByUsedInFinancingActivities
Cash and cash equivalents at beginning of year (85,987)us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents 6,179us-gaap_EffectOfExchangeRateOnCashAndCashEquivalents
Net increase in cash and cash equivalents 65,563us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease 14,948us-gaap_CashAndCashEquivalentsPeriodIncreaseDecrease
Effect of exchange rate changes on cash and cash equivalents 964,110us-gaap_CashAndCashEquivalentsAtCarryingValue 936,886us-gaap_CashAndCashEquivalentsAtCarryingValue
Cash and cash equivalents at end of period 1,029,673us-gaap_CashAndCashEquivalentsAtCarryingValue 951,834us-gaap_CashAndCashEquivalentsAtCarryingValue
Supplemental Disclosures    
Interest paid 12,715us-gaap_InterestPaid 11,844us-gaap_InterestPaid
Income taxes paid (net of refunds) $ 41,683us-gaap_IncomeTaxesPaidNet $ 31,772us-gaap_IncomeTaxesPaidNet