Capitalization of debt issuance costs.

No definition available.

Name:	sni_CapitalizationOfDebtIssuanceCosts
Namespace Prefix:	sni_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Debt instrument additional payment.

+ References

No definition available.

+ Details

Name:	sni_DebtInstrumentAdditionalPayment
Namespace Prefix:	sni_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Line of credit facility additional borrowing capacity.

+ References

No definition available.

+ Details

Name:	sni_LineOfCreditFacilityAdditionalBorrowingCapacity
Namespace Prefix:	sni_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of the total principal payments made during the annual reporting period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 22
-Article 5

+ Details

Name:	us-gaap_DebtInstrumentAnnualPrincipalPayment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

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

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
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=34725769&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=6451184&loc=d3e28551-108399

+ Details

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

- Definition

Increase for accrued, but unpaid interest on the debt instrument for the period.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 235
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.4-08.(f))
-URI http://asc.fasb.org/extlink&oid=26873400&loc=d3e23780-122690

+ Details

Name:	us-gaap_DebtInstrumentIncreaseAccruedInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

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

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
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

Name:	us-gaap_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

+ Details

Name:	us-gaap_DebtInstrumentMaturityDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of the required periodic payments including both interest and principal payments.

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

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPayment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of the required periodic payments applied to interest.

+ References

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPaymentInterest
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of the required periodic payments applied to principal.

+ References

+ Details

Name:	us-gaap_DebtInstrumentPeriodicPaymentPrincipal
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Description of debt redemption features under terms of the debt agreement.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 470
-Section 50
-Paragraph 3
-Subparagraph e
-URI http://asc.fasb.org/extlink&oid=6479336&loc=d3e64711-112823

+ Details

Name:	us-gaap_DebtInstrumentRedemptionDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

End date of debt instrument redemption period, in CCYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_DebtInstrumentRedemptionPeriodEndDate
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage price of original principal amount of debt at which debt can be redeemed by the issuer.

+ References

+ Details

Name:	us-gaap_DebtInstrumentRedemptionPricePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of principal amount of debt redeemed.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentRedemptionPricePercentageOfPrincipalAmountRedeemed
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Fair value amount of debt instrument that was repurchased.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentRepurchaseAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

The amount of debt premium 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

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=34725769&loc=d3e28878-108400

+ Details

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

- Definition

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

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

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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

- 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 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 2: 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

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Regulation S-X (SX)
-Number 210
-Section 02
-Paragraph 19, 20, 22
-Article 5

+ Details

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

+ Details

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

- Definition

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

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Description of the interest rate for the amounts borrowed under the credit facility, including the terms and the method for determining the interest rate (for example, fixed or variable, LIBOR plus a percentage, increasing rate, timing of interest rate resets, remarketing provisions).

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateDescription
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The effective interest rate during the reporting period.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInterestRateDuringPeriod
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
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

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

- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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

- Definition

Carrying value as of the balance sheet date of loans payable (with maturities initially due after one year or beyond the operating cycle if longer), excluding current portion.

+ References

+ Details

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

- Definition

Write-off of amounts previously capitalized as debt issuance cost in an extinguishment of debt.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 225
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SX 210.5-03.8)
-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

+ Details

Name:	us-gaap_WriteOffOfDeferredDebtIssuanceCost
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_BusinessAcquisitionAxis=sni_TVNMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_UnsecuredDebtMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=sni_TwoPointSevenFiveSeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=sni_ThreePointNineZeroSeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=sni_ThreePointFiveFiveSeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=sni_TwoPointSevenZeroSeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=sni_TwoPointEightZeroSeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=sni_ThreePointFiveZeroSeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=sni_ThreePointNineFiveSeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=sni_TVNSevenPointEightEightSeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=sni_TVNSevenPointThreeSevenFiveSeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=sni_TVNSevenPointThreeEightSeniorNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=sni_BankPekaoSAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=sni_TVNRevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=sni_CashLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_RangeAxis=us-gaap_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Debt - Additional Information (Details)								12 Months Ended
Debt - Additional Information (Details)	Nov. 16, 2015 EUR (€)	Oct. 16, 2015 EUR (€)	Sep. 15, 2015 EUR (€)	Jul. 31, 2015 EUR (€)	May. 18, 2015 USD ($)	Mar. 31, 2014 USD ($)	Sep. 16, 2013	Dec. 31, 2015 USD ($)	Dec. 31, 2015 EUR (€)	Dec. 31, 2014 USD ($)	Dec. 31, 2015 EUR (€)	Jun. 26, 2015 USD ($)	Jun. 02, 2015 USD ($)	Nov. 30, 2014 USD ($)	Jun. 10, 2013 EUR (€)	Jun. 10, 2013 PLN
Debt Instrument [Line Items]
Debt issuance of costs \| $								$ 20,400,000
Amortization of debt issuance costs \| $								6,000,000		$ 3,000,000
Debt Instrument, Principal amount				€ 364,900,000
Debt instrument, repurchase amount				€ 300,000,000
Debt instrument, annual principal payment											€ 363,400,000
Debt instrument, increase, accrued interest									€ 1,500,000
Debt instrument additional payment									4,600,000
TVN [Member]
Debt Instrument [Line Items]
Senior note maturity date									€ 118,900,000
Term Loan [Member]
Debt Instrument [Line Items]
Term Loan \| $								$ 249,129,000				$ 250,000,000
Debt Instrument Maturity Date								Jun. 26, 2017	Jun. 26, 2017
Weighted average interest rate								1.37%			1.37%
2.75 % Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount \| $														$ 500,000,000
3.90 % Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount \| $														500,000,000
3.55 % Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount \| $														$ 885,000,000
2.70 % Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount \| $								$ 500,000,000
2.80 % Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount \| $													$ 600,000,000
Debt instrument Stated interest rate								2.80%			2.80%
3.50 % Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount \| $													400,000,000
Debt instrument Stated interest rate								3.50%			3.50%
3.95 % Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Face Amount \| $													$ 500,000,000
Debt instrument Stated interest rate								3.95%			3.95%
TVN 7.88% Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument Stated interest rate								7.88%			7.88%
TVN 7.88% Senior Notes [Member] \| TVN [Member]
Debt Instrument [Line Items]
Debt instrument Stated interest rate	7.88%
Debt Instrument, Principal amount	€ 116,600,000	€ 116,600,000
Senior note maturity date	118,900,000
Debt Instrument, premium	2,300,000	2,300,000
Debt instrument redemption date								Nov. 16, 2015	Nov. 16, 2015
T V N Seven Point Three Seven Five Senior Notes \| TVN [Member]
Debt Instrument [Line Items]
Redemption price percentage of the principal amount							103.00%	107.38%	107.38%
Debt instrument redemption date								Prior to December 15, 2016 TVN Finance Corp may redeem up to 40 percent of the original principal amount of the 2020 TVN Notes with net cash proceeds of one or more equity offerings at a redemption price of 107.38% of the principal amount plus accrued and unpaid interest, if any, to the redemption date. Also, prior to December 15, 2016, TVN Finance Corp. may redeem up to 10.0 percent of the original principal amount of the 2020 TVN Notes at a redemption price equal to 103.00% of the aggregate principal amount plus accrued and unpaid interest, if any, to the redemption date. A 10.0 percent redemption was executed in September 2015 and in November 2015, leaving one more opportunity to redeem another 10.0 percent at 103.00% prior to December 16, 2016. At any time prior to December 16, 2016 TVN Finance Corp. may redeem the 2020 TVN Notes in whole, but not in part, at a price equal to 100.00% of the principal amount plus the applicable make-whole premium and accrued and unpaid interest, if any, up to the redemption date	Prior to December 15, 2016 TVN Finance Corp may redeem up to 40 percent of the original principal amount of the 2020 TVN Notes with net cash proceeds of one or more equity offerings at a redemption price of 107.38% of the principal amount plus accrued and unpaid interest, if any, to the redemption date. Also, prior to December 15, 2016, TVN Finance Corp. may redeem up to 10.0 percent of the original principal amount of the 2020 TVN Notes at a redemption price equal to 103.00% of the aggregate principal amount plus accrued and unpaid interest, if any, to the redemption date. A 10.0 percent redemption was executed in September 2015 and in November 2015, leaving one more opportunity to redeem another 10.0 percent at 103.00% prior to December 16, 2016. At any time prior to December 16, 2016 TVN Finance Corp. may redeem the 2020 TVN Notes in whole, but not in part, at a price equal to 100.00% of the principal amount plus the applicable make-whole premium and accrued and unpaid interest, if any, up to the redemption date
TVN 7.38% Senior Notes [Member]
Debt Instrument [Line Items]
Debt instrument Stated interest rate								7.38%			7.38%
Debt Instrument, Principal amount		43,000,000	€ 43,000,000
Senior note maturity date		45,600,000	45,100,000
Debt Instrument, premium		1,300,000	1,300,000
Debt Instrument, Accrued but unpaid interest		€ 1,300,000	€ 800,000
TVN 7.38% Senior Notes [Member] \| TVN [Member]
Debt Instrument [Line Items]
Debt instrument Stated interest rate			7.38%
Debt Instrument, Principal amount	43,000,000
Senior note maturity date	45,600,000
Redemption price percentage of the principal amount								100.00%	100.00%
Debt Instrument, Accrued but unpaid interest	€ 1,300,000
Bank Pekao S.A [Member] \| TVN Facility [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity \| PLN																PLN 300,000,000
Bank Pekao S.A [Member] \| Cash Loan [Member]
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity															€ 25,000,000
Minimum [Member] \| Term Loan [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (in hundredths)								62.50%	62.50%
Maximum [Member] \| Term Loan [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (in hundredths)								137.50%	137.50%
Maximum [Member] \| T V N Seven Point Three Seven Five Senior Notes \| TVN [Member]
Debt Instrument [Line Items]
Redemption percentage of the original principal amount							10.00%	40.00%	40.00%
Revolving Credit Facility
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity \| $					$ 1,150,000,000	$ 650,000,000
Expiration date of revolving credit facility						Mar. 31, 2019		Mar. 31, 2020	Mar. 31, 2020
Line of credit facility, additional borrowing capacity \| $					250,000,000
Line of Credit Facility, Current Borrowing Capacity \| $					900,000,000
Line of credit facility, remaining borrowing capacity \| $					$ 32,500,000
Line of credit facility, interest rate description								LIBOR plus a range of 69 to 130 basis points and a facility fee ranging from 6 to 20 basis points, also subject to the Company’s credit ratings	LIBOR plus a range of 69 to 130 basis points and a facility fee ranging from 6 to 20 basis points, also subject to the Company’s credit ratings
Revolving credit facility \| $								$ 389,200,000		0
Outstanding borrowings interest rate								1.44%	1.44%
Letters of credit outstanding, amount \| $								$ 1,100,000		$ 0
Revolving Credit Facility \| Minimum [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (in hundredths)								69.00%	69.00%
Basis spread on variable rate, commitment fee (in hundredths)								6.00%	6.00%
Revolving Credit Facility \| Maximum [Member]
Debt Instrument [Line Items]
Basis spread on variable rate (in hundredths)								130.00%	130.00%
Basis spread on variable rate, commitment fee (in hundredths)								20.00%	20.00%