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Financial Instruments and Fair Value Measurements - Summary of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis (Detail) (USD $)
In Millions, unless otherwise specified

Apr. 24, 2015

Apr. 25, 2014

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

$ 5,326.2us-gaap_InvestmentsFairValueDisclosure

$ 5,003.3us-gaap_InvestmentsFairValueDisclosure

Senior Notes

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Long-term debt

(1,523.6)us-gaap_DebtInstrumentFairValue
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember

(1,000.0)us-gaap_DebtInstrumentFairValue
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember

Other Current Assets

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Foreign currency exchange contracts assets

3.4us-gaap_ForeignCurrencyContractAssetFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember

^[1]

0.4us-gaap_ForeignCurrencyContractAssetFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember

^[1]

Accrued Expenses

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Foreign currency exchange contracts liabilities

(1.9)us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_AccruedLiabilitiesMember

^[2]

Quoted Prices in Active Markets for Identical Assets (Level 1)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

1,811.9us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member

2,359.1us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member

Quoted Prices in Active Markets for Identical Assets (Level 1) | Senior Notes

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Long-term debt

0us-gaap_DebtInstrumentFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember

0us-gaap_DebtInstrumentFairValue
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= us-gaap_FairValueInputsLevel1Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember

Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Current Assets

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Foreign currency exchange contracts assets

0us-gaap_ForeignCurrencyContractAssetFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember
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= us-gaap_FairValueInputsLevel1Member

^[1]

0us-gaap_ForeignCurrencyContractAssetFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member

^[1]

Quoted Prices in Active Markets for Identical Assets (Level 1) | Accrued Expenses

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Foreign currency exchange contracts liabilities

0us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_AccruedLiabilitiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member

^[2]

Significant Other Observable Inputs (Level 2)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

3,514.3us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member

2,644.2us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member

Significant Other Observable Inputs (Level 2) | Senior Notes

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Long-term debt

(1,523.6)us-gaap_DebtInstrumentFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember

(1,000.0)us-gaap_DebtInstrumentFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember

Significant Other Observable Inputs (Level 2) | Other Current Assets

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Foreign currency exchange contracts assets

3.4us-gaap_ForeignCurrencyContractAssetFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member

^[1]

0.4us-gaap_ForeignCurrencyContractAssetFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member

^[1]

Significant Other Observable Inputs (Level 2) | Accrued Expenses

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Foreign currency exchange contracts liabilities

(1.9)us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_AccruedLiabilitiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member

^[2]

Significant Unobservable Inputs (Level 3)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member

Significant Unobservable Inputs (Level 3) | Senior Notes

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Long-term debt

0us-gaap_DebtInstrumentFairValue
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_LongtermDebtTypeAxis
= us-gaap_SeniorNotesMember

Significant Unobservable Inputs (Level 3) | Other Current Assets

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Foreign currency exchange contracts assets

0us-gaap_ForeignCurrencyContractAssetFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member

^[1]

Significant Unobservable Inputs (Level 3) | Accrued Expenses

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Foreign currency exchange contracts liabilities

0us-gaap_ForeignCurrencyContractsLiabilityFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_AccruedLiabilitiesMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member

^[2]

Cash

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

1,666.3us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_CashAndCashEquivalentsAxis
= us-gaap_CashMember

2,174.0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_CashAndCashEquivalentsAxis
= us-gaap_CashMember

Cash | Quoted Prices in Active Markets for Identical Assets (Level 1)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

1,666.3us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_CashAndCashEquivalentsAxis
= us-gaap_CashMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member

2,174.0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_CashAndCashEquivalentsAxis
= us-gaap_CashMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member

Cash | Significant Other Observable Inputs (Level 2)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_CashAndCashEquivalentsAxis
= us-gaap_CashMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member

Cash | Significant Unobservable Inputs (Level 3)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_CashAndCashEquivalentsAxis
= us-gaap_CashMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member

Corporate Bonds

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

2,257.6us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_InvestmentTypeAxis
= us-gaap_CorporateBondSecuritiesMember

2,152.3us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_InvestmentTypeAxis
= us-gaap_CorporateBondSecuritiesMember

Corporate Bonds | Quoted Prices in Active Markets for Identical Assets (Level 1)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_CorporateBondSecuritiesMember

0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_CorporateBondSecuritiesMember

Corporate Bonds | Significant Other Observable Inputs (Level 2)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

2,257.6us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_CorporateBondSecuritiesMember

2,152.3us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_CorporateBondSecuritiesMember

Corporate Bonds | Significant Unobservable Inputs (Level 3)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_CorporateBondSecuritiesMember

U.S. Treasury and Government Debt Securities

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

1,058.2us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_InvestmentTypeAxis
= us-gaap_USTreasuryAndGovernmentMember

263.6us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_InvestmentTypeAxis
= us-gaap_USTreasuryAndGovernmentMember

U.S. Treasury and Government Debt Securities | Quoted Prices in Active Markets for Identical Assets (Level 1)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

145.6us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_USTreasuryAndGovernmentMember

185.1us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_USTreasuryAndGovernmentMember

U.S. Treasury and Government Debt Securities | Significant Other Observable Inputs (Level 2)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

912.6us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_USTreasuryAndGovernmentMember

78.5us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_USTreasuryAndGovernmentMember

U.S. Treasury and Government Debt Securities | Significant Unobservable Inputs (Level 3)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_USTreasuryAndGovernmentMember

Foreign Government Debt Securities

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

37.9us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_InvestmentTypeAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember

Foreign Government Debt Securities | Quoted Prices in Active Markets for Identical Assets (Level 1)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember

Foreign Government Debt Securities | Significant Other Observable Inputs (Level 2)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

37.9us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_ForeignGovernmentDebtSecuritiesMember

Commercial Paper

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

20.0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_InvestmentTypeAxis
= us-gaap_CommercialPaperMember

168.4us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_InvestmentTypeAxis
= us-gaap_CommercialPaperMember

Commercial Paper | Quoted Prices in Active Markets for Identical Assets (Level 1)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_CommercialPaperMember

0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_CommercialPaperMember

Commercial Paper | Significant Other Observable Inputs (Level 2)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

20.0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_CommercialPaperMember

168.4us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_CommercialPaperMember

Commercial Paper | Significant Unobservable Inputs (Level 3)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_CommercialPaperMember

Certificates of Deposit

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

286.2us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_InvestmentTypeAxis
= us-gaap_CertificatesOfDepositMember

245.0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_InvestmentTypeAxis
= us-gaap_CertificatesOfDepositMember

Certificates of Deposit | Quoted Prices in Active Markets for Identical Assets (Level 1)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_CertificatesOfDepositMember

0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_CertificatesOfDepositMember

Certificates of Deposit | Significant Other Observable Inputs (Level 2)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

286.2us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_CertificatesOfDepositMember

245.0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel2Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_CertificatesOfDepositMember

Certificates of Deposit | Significant Unobservable Inputs (Level 3)

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_CertificatesOfDepositMember

Mutual Funds | Other Current Assets

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

2.8us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquityFundsMember

^[1]

6.4us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
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/ us-gaap_InvestmentTypeAxis
= us-gaap_EquityFundsMember

^[1]

Mutual Funds | Other Noncurrent Assets

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

29.4us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherNoncurrentAssetsMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquityFundsMember

^[3]

26.3us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherNoncurrentAssetsMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquityFundsMember

^[3]

Mutual Funds | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Current Assets

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

2.8us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel1Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquityFundsMember

^[1]

6.4us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
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/ us-gaap_InvestmentTypeAxis
= us-gaap_EquityFundsMember

^[1]

Mutual Funds | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Noncurrent Assets

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

29.4us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherNoncurrentAssetsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
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/ us-gaap_InvestmentTypeAxis
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^[3]

26.3us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
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/ us-gaap_FairValueByFairValueHierarchyLevelAxis
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/ us-gaap_InvestmentTypeAxis
= us-gaap_EquityFundsMember

^[3]

Mutual Funds | Significant Other Observable Inputs (Level 2) | Other Current Assets

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
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^[1]

0us-gaap_InvestmentsFairValueDisclosure
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/ us-gaap_InvestmentTypeAxis
= us-gaap_EquityFundsMember

^[1]

Mutual Funds | Significant Other Observable Inputs (Level 2) | Other Noncurrent Assets

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
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^[3]

0us-gaap_InvestmentsFairValueDisclosure
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/ us-gaap_FairValueByFairValueHierarchyLevelAxis
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/ us-gaap_InvestmentTypeAxis
= us-gaap_EquityFundsMember

^[3]

Mutual Funds | Significant Unobservable Inputs (Level 3) | Other Current Assets

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherCurrentAssetsMember
/ us-gaap_FairValueByFairValueHierarchyLevelAxis
= us-gaap_FairValueInputsLevel3Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquityFundsMember

^[1]

Mutual Funds | Significant Unobservable Inputs (Level 3) | Other Noncurrent Assets

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
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= us-gaap_FairValueInputsLevel3Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_EquityFundsMember

^[3]

Auction Rate Securities | Other Noncurrent Assets

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

36.0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
= us-gaap_OtherNoncurrentAssetsMember
/ us-gaap_InvestmentTypeAxis
= us-gaap_AuctionRateSecuritiesMember

^[1]

Auction Rate Securities | Quoted Prices in Active Markets for Identical Assets (Level 1) | Other Noncurrent Assets

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
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= us-gaap_FairValueInputsLevel1Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_AuctionRateSecuritiesMember

^[1]

Auction Rate Securities | Significant Other Observable Inputs (Level 2) | Other Noncurrent Assets

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

0us-gaap_InvestmentsFairValueDisclosure
/ us-gaap_BalanceSheetLocationAxis
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= us-gaap_FairValueInputsLevel2Member
/ us-gaap_InvestmentTypeAxis
= us-gaap_AuctionRateSecuritiesMember

^[1]

Auction Rate Securities | Significant Unobservable Inputs (Level 3) | Other Noncurrent Assets

Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]

Assets

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Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 825

-SubTopic 10

-Section 50

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Fair value portion of investment securities, including, but not limited to, marketable securities, derivative financial instruments, and investments accounted for under the equity method.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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-Glossary Available-for-Sale Securities

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-Name Accounting Standards Codification

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-URI http://asc.fasb.org/extlink&oid=6526789



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