Debt Issuance Redemption Discount Premium Percentage Of Principal Amount

No definition available.

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- Definition

Line of Credit Facility, Option to Increase Borrowing Capacity

+ References

No definition available.

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Period Type:	duration

- 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 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=64930739&loc=d3e28878-108400

Reference 2: 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=64930785&loc=d3e28551-108399

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Fair value portion of debt instrument payable, including, but not limited to, notes payable and loans payable.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 825
-SubTopic 10
-Section 50
-Paragraph 10
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13433-108611

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-Section 50
-Paragraph 12
-URI http://asc.fasb.org/extlink&oid=73719730&loc=d3e13476-108611

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

+ Details

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Period Type:	instant

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

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- Definition

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

+ References

+ Details

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Balance Type:	na
Period Type:	duration

- Definition

Amount, after accumulated amortization, of debt discount.

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
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-Paragraph 1A
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28541-108399

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+ Details

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Balance Type:	debit
Period Type:	instant

- Definition

Amount, before accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=64930785&loc=d3e28555-108399

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- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ References

Reference 1: 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))
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+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

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

+ References

+ Details

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Balance Type:	na
Period Type:	duration

- 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.

+ References

+ Details

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Balance Type:	credit
Period Type:	instant

- Definition

The cash inflow from additional borrowings, net of cash paid to third parties in connection with debt origination.

+ References

No definition available.

+ Details

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Period Type:	duration

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Borrowing Arrangements (Detail) - USD ($)	1 Months Ended		12 Months Ended
Borrowing Arrangements (Detail) - USD ($)	Jun. 30, 2015	Dec. 31, 2012	Jan. 31, 2017	Jan. 31, 2016
Debt Disclosure [Line Items]
Unsecured revolving credit facility			$ 400,000,000
Unsecured revolving credit facility, option to request an increase in the amount of the credit facility up to			$ 100,000,000.0
Line of credit facility, expiration			May 31, 2020
Line of credit facility, outstanding borrowings			$ 0	$ 0
Senior Notes \| Senior Notes due 2020
Debt Disclosure [Line Items]
Face amount	$ 450,000,000
Stated interest rate	3.125%
Maturity date	Jun. 15, 2020
Senior Notes \| Senior Notes due 2025
Debt Disclosure [Line Items]
Face amount	$ 300,000,000
Stated interest rate	4.375%
Maturity date	Jun. 15, 2025
Senior Notes \| 2015 Senior Notes
Debt Disclosure [Line Items]
Proceeds from debt, net of issuance costs	$ 742,000,000
Unamortized discount	1,700,000
Debt issuance costs	$ 6,300,000
Debt redemption percentage of principle amount (as a percent)	101.00%
Fair value disclosure			768,100,000
Senior Notes \| Senior Notes due 2017
Debt Disclosure [Line Items]
Face amount		$ 400,000,000
Stated interest rate		1.95%
Maturity date		Dec. 15, 2017
Senior Notes \| Senior Notes due 2022
Debt Disclosure [Line Items]
Face amount		$ 350,000,000
Stated interest rate		3.60%
Maturity date		Dec. 15, 2022
Senior Notes \| 2012 Senior Notes
Debt Disclosure [Line Items]
Proceeds from debt, net of issuance costs		$ 739,300,000
Unamortized discount		4,500,000
Debt issuance costs		$ 6,100,000
Debt redemption percentage of principle amount (as a percent)		101.00%
Fair value disclosure			$ 758,600,000