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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 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 SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 22

-Article 5

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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- 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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- Definition

The percentage of ownership of common stock or equity participation in the investee accounted for under the equity method of accounting.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 323

-SubTopic 10

-Section 50

-Paragraph 3

-Subparagraph (a)(1)

-URI http://asc.fasb.org/extlink&oid=6382943&loc=d3e33918-111571

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Condensed Consolidating Guarantor Financial Information - Additional Information (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014	Dec. 31, 2013	Oct. 31, 2013	Dec. 31, 2012
Senior Notes [member]
Condensed Financial Statements, Captions [Line Items]
Long-term debt, gross	$ 1,500	$ 1,500	$ 1,500	$ 0
Debt instrument, interest rate, stated percentage	5.625%	5.625%	5.625%
Mortgage loan [member]
Condensed Financial Statements, Captions [Line Items]
Long-term debt, gross	525	525	525	0
Debt instrument, interest rate, stated percentage	2.30%	2.32%
Subsidiary Issuer [Member]
Condensed Financial Statements, Captions [Line Items]
Ownership Percentage	100.00%	100.00%
Subsidiary Issuer [Member] \| Senior Notes [member]
Condensed Financial Statements, Captions [Line Items]
Long-term debt, gross			1,500
Debt instrument, interest rate, stated percentage			5.625%
Non-Guarantor Subsidiaries [member] \| Mortgage loan [member]
Condensed Financial Statements, Captions [Line Items]
Long-term debt, gross	$ 589
Guarantor Subsidiaries [Member]
Condensed Financial Statements, Captions [Line Items]
Ownership Percentage	100.00%	100.00%