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3. Fair Value Measurements Fair Value Level Table (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Millions, unless otherwise specified | Mar. 31, 2012 | Dec. 31, 2011
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | $ 437.3 |  | $ 366.0 |
Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents | 33.0 | [1] | 79.9 | [1]
Available-for-sale Securities, Fair Value Disclosure | 175.5 | [2] | 134.8 | [2]
Forward Foreign Exchange Contracts, Asset, Fair Value Disclosure | 0 | [3] | 0 | [3]
Assets, Fair Value Disclosure | 208.5 |  | 214.7 |
Forward Foreign Exchange Contracts, Liability, Fair Value Disclosure | 0 | [4] | 0 | [4]
Business Acquisition, Contingent Consideration, at Fair Value | 0 | [5] | 0 | [5]
Liabilities, Fair Value Disclosure | 0 |  | 0 |
Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents | 165.0 | [1] | 114.6 | [1]
Available-for-sale Securities, Fair Value Disclosure | 261.8 | [2] | 231.2 | [2]
Forward Foreign Exchange Contracts, Asset, Fair Value Disclosure | 0.3 | [3] | 0.8 | [3]
Assets, Fair Value Disclosure | 427.1 |  | 346.6 |
Forward Foreign Exchange Contracts, Liability, Fair Value Disclosure | 0.6 | [4] | 1.2 | [4]
Business Acquisition, Contingent Consideration, at Fair Value | 0 | [5] | 0 | [5]
Liabilities, Fair Value Disclosure | 0.6 |  | 1.2 |
Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents | 0 | [1] | 0 | [1]
Available-for-sale Securities, Fair Value Disclosure | 0 | [2] | 0 | [2]
Forward Foreign Exchange Contracts, Asset, Fair Value Disclosure | 0 | [3] | 0 | [3]
Assets, Fair Value Disclosure | 0 |  | 0 |
Forward Foreign Exchange Contracts, Liability, Fair Value Disclosure | 0 | [4] | 0 | [4]
Business Acquisition, Contingent Consideration, at Fair Value | 24.7 | [5] | 24.1 | [5]
Liabilities, Fair Value Disclosure | 24.7 |  | 24.1 |
Estimate of Fair Value, Fair Value Disclosure [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents | 198.0 | [1] | 194.5 | [1]
Available-for-sale Securities, Fair Value Disclosure | 437.3 | [2] | 366.0 | [2]
Forward Foreign Exchange Contracts, Asset, Fair Value Disclosure | 0.3 | [3] | 0.8 | [3]
Assets, Fair Value Disclosure | 635.6 |  | 561.3 |
Forward Foreign Exchange Contracts, Liability, Fair Value Disclosure | 0.6 | [4] | 1.2 | [4]
Business Acquisition, Contingent Consideration, at Fair Value | 24.7 | [5] | 24.1 | [5]
Liabilities, Fair Value Disclosure | 25.3 |  | 25.3 |
Commercial Paper [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents | 0 | [1] | 0 | [1]
Commercial Paper [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents | 146.3 | [1] | 106.0 | [1]
Commercial Paper [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents | 0 | [1] | 0 | [1]
Commercial Paper [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents | 146.3 | [1] | 106.0 | [1]
Corporate Bond Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents |  |  | 0 | [1]
Corporate Bond Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents |  |  | 8.6 | [1]
Corporate Bond Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents |  |  | 0 | [1]
Corporate Bond Securities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents |  |  | 8.6 | [1]
Municipal obligations [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents | 0 | [1] |  |
Municipal obligations [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents | 5.0 | [1] |  |
Municipal obligations [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents | 0 | [1] |  |
Municipal obligations [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents | 5.0 | [1] |  |
Foreign Government Obligations [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents | 0 | [1] |  |
Foreign Government Obligations [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents | 8.7 | [1] |  |
Foreign Government Obligations [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents | 0 | [1] |  |
Foreign Government Obligations [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents | 8.7 | [1] |  |
Time Deposits [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents | 26.0 | [1] | 21.6 | [1]
Time Deposits [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents | 5.0 | [1] | 0 | [1]
Time Deposits [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents | 0 | [1] | 0 | [1]
Time Deposits [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents | 31.0 | [1] | 21.6 | [1]
Money Market Funds [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents | 7.0 | [1] | 58.3 | [1]
Money Market Funds [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents | 0 | [1] | 0 | [1]
Money Market Funds [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents | 0 | [1] | 0 | [1]
Money Market Funds [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Cash Equivalents | 7.0 | [1] | 58.3 | [1]
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 0 | [2] | 0 | [2]
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 170.1 | [2] | 170.6 | [2]
Corporate Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 0 | [2] | 0 | [2]
Corporate Debt Securities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 170.1 | [2] | 170.6 | [2]
Brokered Certificates of Deposit [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 0 | [2] | 0 | [2]
Brokered Certificates of Deposit [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 1.8 | [2] | 1.8 | [2]
Brokered Certificates of Deposit [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 0 | [2] | 0 | [2]
Brokered Certificates of Deposit [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 1.8 | [2] | 1.8 | [2]
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 0 | [2] | 0 | [2]
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 57.9 | [2] | 36.9 | [2]
US Government Agencies Debt Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 0 | [2] | 0 | [2]
US Government Agencies Debt Securities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 57.9 | [2] | 36.9 | [2]
Foreign Government Obligations [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 0 | [2] | 0 | [2]
Foreign Government Obligations [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 10.1 | [2] | 5.7 | [2]
Foreign Government Obligations [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 0 | [2] | 0 | [2]
Foreign Government Obligations [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 10.1 | [2] | 5.7 | [2]
Municipal obligations [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 0 | [2] | 0 | [2]
Municipal obligations [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 3.1 | [2] | 5.0 | [2]
Municipal obligations [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 0 | [2] | 0 | [2]
Municipal obligations [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 3.1 | [2] | 5.0 | [2]
Marketable Equity Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 175.5 | [2] | 134.8 | [2]
Marketable Equity Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 0 | [2] | 0 | [2]
Marketable Equity Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 0 | [2] | 0 | [2]
Marketable Equity Securities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 175.5 | [2] | 134.8 | [2]
Asset-backed Securities [Member] | Fair Value, Inputs, Level 1 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 0 | [2] | 0 | [2]
Asset-backed Securities [Member] | Fair Value, Inputs, Level 2 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 18.8 | [2] | 11.2 | [2]
Asset-backed Securities [Member] | Fair Value, Inputs, Level 3 [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 0 | [2] | 0 | [2]
Asset-backed Securities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 18.8 | [2] | 11.2 | [2]
Other Current Liabilities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Business Acquisition, Contingent Consideration, at Fair Value, Current | 14.9 |  | 8.5 |
Short-term Investments [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 273.2 |  | 238.8 |
Short-term Investments [Member] | Corporate Debt Securities [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 170.1 |  | 170.6 |
Short-term Investments [Member] | Brokered Certificates of Deposit [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 1.8 |  | 1.8 |
Short-term Investments [Member] | US Government Agencies Debt Securities [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 57.9 |  | 36.9 |
Short-term Investments [Member] | Foreign Government Obligations [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 9.7 |  | 5.4 |
Short-term Investments [Member] | Municipal obligations [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 3.1 |  | 5.0 |
Short-term Investments [Member] | Marketable Equity Securities [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 12.1 |  | 8.3 |
Short-term Investments [Member] | Asset-backed Securities [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 18.5 |  | 10.8 |
Other Assets [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Available-for-sale Securities, Fair Value Disclosure | 164.1 |  | 127.2 |
Other Long-term Liabilities [Member] | Estimate of Fair Value, Fair Value Disclosure [Member] |  |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |  |
Business Acquisition, Contingent Consideration, at Fair Value, Noncurrent | $ 9.8 |  | $ 15.6 |
[1] | Cash equivalents are included in Cash and cash equivalents in the Condensed Consolidated Balance Sheets.
[2] | Available-for-sale investments are included in the following accounts in the Condensed Consolidated Balance Sheets (in millions): March 31, 2012 December 31, 2011Short-term investments$273.2 $238.8Other assets164.1 127.2Total$437.3 $366.0
[3] | Forward foreign exchange contracts in an asset position are included in Prepaid expenses, taxes and other current assets in the Condensed Consolidated Balance Sheets.
[4] | Forward foreign exchange contracts in a liability position are included in Other current liabilities in the Condensed Consolidated Balance Sheets.
[5] | Contingent consideration liability is included in the following accounts in the Condensed Consolidated Balance Sheet (in millions): March 31, 2012 December 31, 2011Other current liabilities$14.9 $8.5Other long-term liabilities9.8 15.6 Total$24.7 $24.1

X
- Definition This element represents the aggregate of the assets reported on the balance sheet at period end measured at fair value by the entity. This element is intended to be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition This element represents the portion of the balance sheet assertion valued at fair value by the entity whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. This item represents Available-for-sale Securities which consist of all investments in certain debt and equity securities neither classified as trading or held-to-maturity securities. A debt security represents a creditor relationship with an enterprise. Debt securities include, among other items, US Treasury securities, US government securities, municipal securities, corporate bonds, convertible debt, commercial paper, and all securitized debt instruments. An equity security represents an ownership interest in an enterprise or the right to acquire or dispose of an ownership interest in an enterprise at fixed or determinable prices. Equity securities include, among other things, common stock, certain preferred stock, warrant rights, call options, and put options, but do not include convertible debt. An entity may opt to provide the reader with additional narrative text to better understand the nature of investments in debt and equity securities which are categorized as Available-for-sale. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 115 -Paragraph 12 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 320 -SubTopic 10 -Section 25 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6379932&loc=d3e22054-111558 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Glossary Available-for-Sale Securities -URI http://asc.fasb.org/extlink&oid=6505594 + Details
Name: | us-gaap_AvailableForSaleSecuritiesFairValueDisclosure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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