v2.4.0.8

Unsecured Senior Notes Schedule of Unsecured Senior Notes (Details) (USD $)
In Thousands, unless otherwise specified

6 Months Ended

0 Months Ended

6 Months Ended

0 Months Ended

6 Months Ended

Jun. 30, 2013

Dec. 31, 2012

Jun. 30, 2013

5.693% unsecured senior notes [Member]

Jun. 30, 2013

5.194% Unsecured Senior Notes [Member]

Jun. 30, 2013

5.967%t unsecured Senior Notes [Member]

Jun. 30, 2013

5.708% Unsecured Senior Notes [Member]

Jun. 30, 2013

4.289% Unsecured Senior Notes [Member]

Jun. 30, 2013

3.853% Unsecured Senior Notes [Member]

Jun. 30, 2013

3.954% Unsecured Senior Notes [Member]

Apr. 11, 2013

3.279% Unsecured Senior Notes [Member]

Jun. 30, 2013

3.279% Unsecured Senior Notes [Member]

Jun. 27, 2013

3.916%t Unsecured Senior Notes [Member]

Jun. 30, 2013

3.916%t Unsecured Senior Notes [Member]

Jun. 30, 2013

Senior Notes [Member]

Debt Instrument [Line Items]

Coupon/Stated Rate

5.625%

5.00%

5.875%

5.625%

4.125%

3.70%

3.85%

3.125%

3.125%

3.80%

3.80%

Effective Percentage

5.693%

^[1]

5.194%

^[1]

5.967%

^[1]

5.708%

^[1]

4.289%

^[1]

3.853%

^[1]

3.954%

^[1]

3.279%

3.279%

^[1]

3.916%

3.916%

^[1]

Principal Amount

$ 300,000

$ 250,000

$ 700,000

$ 700,000

$ 850,000

$ 850,000

$ 1,000,000

$ 500,000

$ 700,000

$ 5,850,000

Maturity date

Apr. 15, 2015

^[2]

Jun. 01, 2015

^[2]

Oct. 15, 2019

^[2]

Nov. 15, 2020

^[2]

May 15, 2021

^[2]

Nov. 15, 2018

^[2]

Feb. 01, 2023

^[2]

Sep. 01, 2023

Sep. 01, 2023

^[2]

Feb. 01, 2024

Feb. 01, 2024

^[2]

Unsecured senior notes, discount

15,027

10,472

(15,027)

Unsecured senior notes

$ 5,834,973

$ 4,639,528

$ 5,834,973

[1]	Yield on issuance date including the effects of discounts on the notes and the amortization of financing costs.
[2]	No principal amounts are due prior to maturity.

X

- 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

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20

-Article 5



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



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 210.5-02.22)

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



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9

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X

- Definition

Effective interest rate for the funds borrowed under the debt agreement considering interest compounding and original issue discount or premium.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28551-108399



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

-Publisher SEC

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X

- Definition

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

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



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

-Publisher FASB

-Name Accounting Standards Codification

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-Section S99

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X

- 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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5



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

-Publisher FASB

-Name Accounting Standards Codification

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

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X

- Definition

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

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 45

-Paragraph 1A

-URI http://asc.fasb.org/extlink&oid=6451184&loc=d3e28541-108399



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X

- 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

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 942

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.9-03.16)

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