Debt (Components Of Total Indebtedness) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Mar. 31, 2013	Dec. 31, 2012
Debt Instrument [Line Items]
Other long-term debt	$ 4,981	$ 4,758
Total long-term debt, net	3,078,030	3,171,945
Current portion of long-term debt	71,968	133,998
Total long-term debt, less current portion, net	3,006,062	3,037,947
1.75% Convertible Senior Subordinated Notes Due 2015 [Member]
Debt Instrument [Line Items]
Principal amount of Convertible Notes	379,500	379,500
Unamortized discount	(52,380)	(58,168)
Convertible debt	327,120	321,332
Notes, interest rate	1.75%
Debt instrument maturity year	2015
3.25% AMS Convertible Notes Due 2036 [Member]
Debt Instrument [Line Items]
Convertible debt	795	795
Notes, interest rate	3.25%
Debt instrument maturity year	2036
4.00% AMS Convertible Notes Due 2041 [Member]
Debt Instrument [Line Items]
Convertible debt	111	111
Notes, interest rate	4.00%
Debt instrument maturity year	2041
Term Loan A Facility Due 2018 [Member]
Debt Instrument [Line Items]
Face value of debt instrument	1,387,500	1,387,500
Debt instrument maturity year	2018
Term Loan B Facility Due 2018 [Member]
Debt Instrument [Line Items]
Face value of debt instrument	60,550	160,550
Expiration date	Jun. 17, 2018
7.00% Senior Notes Due 2019 [Member]
Debt Instrument [Line Items]
Senior notes, gross	500,000	500,000
Notes, interest rate	7.00%
Debt instrument maturity year	2019
7.00% Senior Notes Due 2020 [Member]
Debt Instrument [Line Items]
Senior notes, gross	400,000	400,000
Unamortized initial purchaser's discount	(3,027)	(3,101)
Senior notes	396,973	396,899
Notes, interest rate	7.00%
Debt instrument maturity year	2020
7.25% Senior Notes Due 2022 [Member]
Debt Instrument [Line Items]
Senior notes, gross	$ 400,000	$ 400,000
Notes, interest rate	7.25%
Debt instrument maturity year	2022

Convertible note gross.

No definition available.

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- Definition

Debt instrument maturity year.

+ References

No definition available.

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- Definition

Unamortized initial Purchaser's discount and debt issuance costs.

+ References

No definition available.

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- Definition

Including the current and noncurrent portions, carrying amount of debt identified as being convertible into another form of financial instrument (typically the entity's common stock) as of the balance sheet date, which originally required full repayment more than twelve months after issuance or greater than the normal operating cycle of the company.

+ References

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- Definition

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.

+ References

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-Name Regulation S-X (SX)

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-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

The stated principal amount of the debt instrument at time of issuance, which may vary from the carrying amount because of unamortized premium or discount.

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- Definition

Interest rate stated in the contractual debt agreement.

+ References

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- Definition

The amount of debt discount that was originally recognized at the issuance of the instrument that has yet to be amortized.

+ References

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-Publisher AICPA

-Name Accounting Principles Board Opinion (APB)

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-Paragraph 16, 20

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- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

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-Name Accounting Standards Codification

-Topic 210

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, including current and noncurrent amounts. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, scheduled to be repaid within one year or the normal operating cycle, if longer. Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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- Definition

Carrying amount of long-term debt, net of unamortized discount or premium, excluding amounts to be repaid within one year or the normal operating cycle, if longer (current maturities). Includes, but not limited to, notes payable, bonds payable, debentures, mortgage loans and commercial paper. Excludes capital lease obligations.

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- Definition

Including both current and noncurrent portions, carrying amount as of the balance sheet date of other forms of debt not elsewhere specified in the taxonomy with initial maturities beyond one year or beyond the normal operating cycle, if longer.

+ References

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-Number 210

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-Paragraph 19, 20, 22

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- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

+ References

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