v2.4.0.8

Debt (Consolidated Debt) (Details) (USD $)

Jun. 30, 2014

Dec. 31, 2013

Debt Instrument [Line Items]

Total debt

$ 2,910,496,000

$ 2,685,287,000

Weighted-Average Interest Rate

5.10%

^[1]

Debt Instrument, Face Amount

2,900,000,000.0

2,700,000,000.0

Commercial Paper [Member]

Debt Instrument [Line Items]

Total debt

220,977,000

^[2]

0

^[2]

Weighted-Average Interest Rate

0.30%

^[1],[2]

Revolving Credit Facility [Member]

Debt Instrument [Line Items]

Total debt

0

^[2]

0

^[2]

Weighted-Average Interest Rate

1.30%

^[1],[2]

Senior Notes [Member] | 6.45% Notes Due 2014 [Member]

Debt Instrument [Line Items]

Total debt

0

^[2]

249,971,000

^[2]

Weighted-Average Interest Rate

6.30%

^[1],[2]

Debt Instrument, Face Amount

250,000,000.0

Debt Instrument, Interest Rate, Stated Percentage

6.45%

Senior Notes [Member] | 5.65% Notes Due 2016 [Member]

Debt Instrument [Line Items]

Total debt

250,970,000

251,183,000

Weighted-Average Interest Rate

5.70%

^[1]

Debt Instrument, Face Amount

250,000,000.0

Debt Instrument, Interest Rate, Stated Percentage

5.65%

Senior Notes [Member] | 6.40% Notes Due 2018 [Member]

Debt Instrument [Line Items]

Total debt

258,313,000

259,346,000

Weighted-Average Interest Rate

5.40%

^[1]

Debt Instrument, Face Amount

250,000,000.0

Debt Instrument, Interest Rate, Stated Percentage

6.40%

Senior Notes [Member] | 6.55% Notes Due 2019 [Member]

Debt Instrument [Line Items]

Total debt

569,704,000

571,515,000

Weighted-Average Interest Rate

5.70%

^[1]

Debt Instrument, Face Amount

550,000,000.0

Debt Instrument, Interest Rate, Stated Percentage

6.55%

Senior Notes [Member] | 4.25% Notes Due 2021 [Member]

Debt Instrument [Line Items]

Total debt

556,763,000

557,213,000

Weighted-Average Interest Rate

4.00%

^[1]

Debt Instrument, Face Amount

550,000,000.0

Debt Instrument, Interest Rate, Stated Percentage

4.25%

Senior Notes [Member] | 6.40% Notes Due 2037 [Member]

Debt Instrument [Line Items]

Total debt

249,007,000

248,998,000

Weighted-Average Interest Rate

6.40%

^[1]

Debt Instrument, Face Amount

250,000,000.0

Debt Instrument, Interest Rate, Stated Percentage

6.40%

Senior Notes [Member] | 4.20% Notes Due 2042 [Member]

Debt Instrument [Line Items]

Total debt

248,391,000

248,377,000

Weighted-Average Interest Rate

4.20%

^[1]

Debt Instrument, Face Amount

250,000,000.0

Debt Instrument, Interest Rate, Stated Percentage

4.20%

Senior Notes [Member] | 5.15% Notes Due 2043 [Member]

Debt Instrument [Line Items]

Total debt

556,371,000

298,684,000

Weighted-Average Interest Rate

5.10%

^[1]

Debt Instrument, Face Amount

$ 550,000,000.0

Debt Instrument, Interest Rate, Stated Percentage

5.15%

[1]	Weighted-average interest rate includes the amortization/accretion of discounts, premiums and gains/losses realized on historical cash flow and fair value hedges in interest expense.
[2]	These borrowings were outstanding for only a portion of the six month period ending June 30, 2014. The weighted-average interest rate for these borrowings was calculated based on the number of days the borrowings were outstanding during the noted period.

X

- Definition

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

+ 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 FASB

-Name Accounting Standards Codification

-Topic 835

-SubTopic 30

-Section 55

-Paragraph 8

-URI http://asc.fasb.org/extlink&oid=6584090&loc=d3e28878-108400

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

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

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

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

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

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X

- Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

X

- 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.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 7



Reference 2: 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 3: 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)

-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 16

-Article 9



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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 20, 22

-Article 5



Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 944

-SubTopic 210

-Section S99

-Paragraph 1

-Subparagraph (SX 210.7-03.16)

-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

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Period Type:	instant

X

- Definition

Weighted average interest rate of long-term debt outstanding.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant