Debt (Minimum Repayments On Outstanding Borrowings Under Term Loans And Notes, Excluding Discounts, Premium And Conversion Features) (Details) (USD $) In Thousands, unless otherwise specified	Mar. 31, 2013
Debt Instrument [Line Items]
2013	$ 70,324
2014	125,000
2015	761,485
2016	1,060,000
2017	550,000
Thereafter	2,550,000
Total	5,116,809
Revolving Facility
Debt Instrument [Line Items]
2013	0
2014	0
2015	0
2016	310,000
2017	0
Thereafter	0
Total	310,000
Loans Payable \| U.S. Term Loans
Debt Instrument [Line Items]
2013	70,313
2014	125,000
2015	187,500
2016	750,000
2017	0
Thereafter	0
Total	1,132,813
Convertible Debt \| Convertible debt
Debt Instrument [Line Items]
2013	11
2014	0
2015	573,985
2016	0
2017	0
Thereafter	0
Total	573,996
Senior Notes \| 2017 Senior Notes
Debt Instrument [Line Items]
2013	0
2014	0
2015	0
2016	0
2017	550,000
Thereafter	0
Total	550,000
Senior Notes \| 2018 Senior Notes
Debt Instrument [Line Items]
2013	0
2014	0
2015	0
2016	0
2017	0
Thereafter	800,000
Total	800,000
Senior Notes \| 2020 Senior Notes
Debt Instrument [Line Items]
2013	0
2014	0
2015	0
2016	0
2017	0
Thereafter	1,000,000
Total	1,000,000
Senior Notes \| 2023 Senior Notes
Debt Instrument [Line Items]
2013	0
2014	0
2015	0
2016	0
2017	0
Thereafter	750,000
Total	$ 750,000

Including current and noncurrent portions, aggregate carrying amount of long-term borrowings as of the balance sheet date before deducting unamortized discount or premiums (if any). May include notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, which had initial maturities beyond one year or beyond the normal operating cycle, if longer.

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name FASB Staff Position (FSP)

-Number APB14-1

-Paragraph 31

-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-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009.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 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.22)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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- Definition

Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing after the fifth fiscal year following the latest fiscal year.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 470

-SubTopic 10

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=6802200&loc=d3e1835-112601

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 47

-Paragraph 10

-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.

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- Definition

Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the next fiscal year following the latest fiscal year.

+ References

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Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the fifth fiscal year following the latest fiscal year.

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Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the fourth fiscal year following the latest fiscal year.

+ References

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- Definition

Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the third fiscal year following the latest fiscal year.

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- Definition

Amount of long-term debt, sinking fund requirements, and other securities redeemable at fixed or determinable prices and dates maturing in the second fiscal year following the latest fiscal year.

+ References

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