XML 43 R30.htm IDEA: XBRL DOCUMENT  v2.3.0.11

2. Short-term Investments (Details) (Fair Value, Measurements, Recurring [Member], USD $) In Millions	Jun. 30, 2011	Dec. 31, 2010
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	$ 267.4	$ 163.6
Unrealized Gains	72.6	49.3
Unrealized Losses	(0.8)	(1.1)
Estimated Fair Value	339.2	211.8
Corporate Debt Securities [Member] | Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	173.3	39.8
Unrealized Gains	0	0
Unrealized Losses	(0.1)	0
Estimated Fair Value	173.2	39.8
Certificates of Deposit [Member] | Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	11.8
Unrealized Gains	0
Unrealized Losses	0
Estimated Fair Value	11.8
US Government Agencies Debt Securities [Member] | Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	14.3	54.7
Unrealized Gains	0	0
Unrealized Losses	0	0
Estimated Fair Value	14.3	54.7
Foreign Government Debt Securities [Member] | Long Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1.5
Unrealized Gains	0
Unrealized Losses	0
Estimated Fair Value	1.5
Foreign Government Debt Securities [Member] | Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	0.6	4.5
Unrealized Gains	0	0
Unrealized Losses	0	0
Estimated Fair Value	0.6	4.5
Municipal Bonds [Member] | Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	5.1	7.7
Unrealized Gains	0	0
Unrealized Losses	0	0
Estimated Fair Value	5.1	7.7
Equity Securities [Member] | Long Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	51.0	45.5
Unrealized Gains	71.0	47.9
Unrealized Losses	(0.6)	(0.9)
Estimated Fair Value	121.4	92.5
Equity Securities [Member] | Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	7.9	8.8
Unrealized Gains	1.5	1.3
Unrealized Losses	0	(0.1)
Estimated Fair Value	9.4	10.0
Asset-backed Securities [Member] | Long Term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	0.5	0.7
Unrealized Gains	0	0.1
Unrealized Losses	(0.1)	(0.1)
Estimated Fair Value	0.4	0.7
Asset-backed Securities [Member] | Short-term Investments [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	1.4	1.9
Unrealized Gains	0.1	0
Unrealized Losses	0	0
Estimated Fair Value	1.5	1.9
Long Term Investments [Member] | Available-for-sale Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	53.0	46.2
Unrealized Gains	71.0	48.0
Unrealized Losses	(0.7)	(1.0)
Estimated Fair Value	123.3	93.2
Short-term Investments [Member] | Available-for-sale Securities [Member]
Schedule of Available-for-sale Securities [Line Items]
Amortized Cost	214.4	117.4
Unrealized Gains	1.6	1.3
Unrealized Losses	(0.1)	(0.1)
Estimated Fair Value	$ 215.9	$ 118.6

X

- Definition

This item represents the cost of debt and equity securities, which are categorized neither as held-to-maturity nor trading, net of adjustments including accretion, amortization, collection of cash, previous other-than-temporary impairments recognized in earnings (less any cumulative-effect adjustments recognized, as defined), and fair value hedge accounting adjustments, if any.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name FASB Staff Position (FSP)
-Number FAS115-1/124-1
-Paragraph 7
-Footnote 2
-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 Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 19
-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 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.2)
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesAmortizedCost
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- 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
Period Type:	instant

X

- Definition

This item represents the gross unrealized gains for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 133
-Paragraph 22
-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 Statement of Financial Accounting Standard (FAS)
-Number 115
-Paragraph 13, 19
-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 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 320
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6872113&loc=d3e27161-111563

+ Details

Name:	us-gaap_AvailableforsaleSecuritiesGrossUnrealizedGain
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

X

- Definition

This item represents the gross unrealized losses for securities, at a point in time, which are categorized neither as held-to-maturity nor trading securities.

+ Details

Name:	us-gaap_AvailableForSaleSecuritiesGrossUnrealizedLosses1
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

X

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ Details

Name:	us-gaap_ScheduleOfAvailableForSaleSecuritiesLineItems
Namespace Prefix:	us-gaap
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration