Long-Term Debt (Narrative) (Details) (USD $)	3 Months Ended
Mar. 31, 2014	Dec. 31, 2013
Debt Instrument [Line Items]
Remaining outstanding principal	$ 8,125,773,000	$ 8,129,546,000
Bridge loan facility	1,900,000,000
Commitments fees related to bridge loan facility	7,500,000
Secured Equipment Financing [Member]
Debt Instrument [Line Items]
Interest Rate	0.00%
Secured equipment financing	10,700,000
Secured equipment financing term	4 years
Senior Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt instrument, face amount	575,000,000
Remaining outstanding principal	8,092,691,000	8,107,066,000
Debt instrument, maturity date	Oct. 14, 2016
Repayment of the outstanding principal balance, quarterly installments amount	14,400,000
Initial pricing for LIBOR based borrowings (in hundredths)	2.875%
Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Line of credit facility maximum borrowing capacity	750,000,000
Debt instrument, maturity date	Nov. 03, 2016
Line of credit facility, current borrowings	$ 0
Interest Rate (in thousandths)	0.40%
Minimum [Member] \| Senior Unsecured Debt [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Interest Rate Margin	0.875%
Minimum [Member] \| Senior Unsecured Debt [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Interest Rate Margin	1.875%
Minimum [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Initial pricing for LIBOR based borrowings (in hundredths)	1.00%
Minimum [Member] \| Revolving Credit Facility [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Interest Rate Margin	0.50%
Minimum [Member] \| Revolving Credit Facility [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Interest Rate Margin	1.50%
Maximum [Member] \| Senior Unsecured Debt [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Interest Rate Margin	2.875%
Maximum [Member] \| Senior Unsecured Debt [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Interest Rate Margin	3.875%
Maximum [Member] \| Revolving Credit Facility [Member]
Debt Instrument [Line Items]
Initial pricing for LIBOR based borrowings (in hundredths)	2.00%
Maximum [Member] \| Revolving Credit Facility [Member] \| Base Rate [Member]
Debt Instrument [Line Items]
Interest Rate Margin	1.50%
Maximum [Member] \| Revolving Credit Facility [Member] \| London Interbank Offered Rate (LIBOR) [Member]
Debt Instrument [Line Items]
Interest Rate Margin	2.50%

The initial pricing for LIBOR borrowings under the Credit Agreement.

No definition available.

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- Definition

Short-Term financing which is expected to be paid back relatively quickly, such as by a subsequent longer-term loan. Also called swing loan or bridge financing.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.19(a)(1))

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-Name Regulation S-X (SX)

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-Section 03

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- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

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- Definition

Amount of long-term debt before deduction of unamortized discount or premium. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt, with initial maturities beyond one year or the normal operating cycle, if longer.

+ References

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-Publisher SEC

-Name Regulation S-X (SX)

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-Number 210

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- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

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-Publisher FASB

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-Topic 835

-SubTopic 30

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- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

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-Name Regulation S-X (SX)

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-Subparagraph (SX 210.5-02.22(a)(1))

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- Definition

Date when the debt instrument is scheduled to be fully repaid, in CCYY-MM-DD format.

+ References

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

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-Name Regulation S-X (SX)

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- Definition

Period of time between issuance and maturity of debt instrument, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

Amount of commitment fees for the unused borrowing capacity under the long-term financing arrangement that is available to the entity.

+ References

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- Definition

Amount borrowed under the credit facility as of the balance sheet date.

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- Definition

The effective interest rate during the reporting period.

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- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

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-Publisher FASB

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- Definition

Amount of the required periodic payment applied to principal.

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-Publisher FASB

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-Topic 210

-SubTopic 10

-Section S99

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- Definition

Secured financing other than securities sold under agreements to repurchase and securities loaned.

+ References

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-Publisher FASB

-Name Accounting Standards Codification

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