Represents the capacity of the securitization program.

No definition available.

Name:	mfs_AccountsReceivableSecuritizationCapacity
Namespace Prefix:	mfs_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Definition

Cash Proceeds for Principal Prepayments, Percentage

+ References

No definition available.

+ Details

Name:	mfs_CashProceedsForPrincipalPrepaymentsPercentage
Namespace Prefix:	mfs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Debt Instrument Basis Spread on Variable Rate, Floor

+ References

No definition available.

+ Details

Name:	mfs_DebtInstrumentBasisSpreadonVariableRateFloor
Namespace Prefix:	mfs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt Instrument Price Percentage On Notes That Are Required To Be Offered For Repurchase

+ References

No definition available.

+ Details

Name:	mfs_DebtInstrumentPricePercentageOnNotesThatAreRequiredToBeOfferedForRepurchase
Namespace Prefix:	mfs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Repayment As Percentage Of Principal Amount

+ References

No definition available.

+ Details

Name:	mfs_RepaymentAsPercentageOfPrincipalAmount
Namespace Prefix:	mfs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Senior Notes Default Redemption Minimum Principal As Percentage Of Principal Outstanding

+ References

No definition available.

+ Details

Name:	mfs_SeniorNotesDefaultRedemptionMinimumPrincipalAsPercentageOfPrincipalOutstanding
Namespace Prefix:	mfs_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- 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=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

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

- Definition

Contractual interest rate for funds borrowed, under the debt 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(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- 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

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 210.5-02.19(b),22(b))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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

- Definition

Number of shares of common and preferred stock issued as dividends during the period. Excludes stock splits.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=6928386&loc=d3e21463-112644

+ Details

Name:	us-gaap_StockDividendsShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=mfs_A2016CreditAgreementMember
Namespace Prefix:
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Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LoanRestructuringModificationAxis=us-gaap_InterestRateBelowMarketReductionMember
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:

- Details

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

- Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=mfs_SeniorNotesand2016CreditAgreementMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=mfs_ScenarioOneMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementScenarioAxis=mfs_ScenarioTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
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- Details

Name:	us-gaap_DebtInstrumentAxis=mfs_SeniorNotes9.50due2024Member
Namespace Prefix:
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Subsequent Events Subsequent Events - Narrative (Detail) - USD ($)			6 Months Ended	12 Months Ended
	Mar. 04, 2016	Feb. 18, 2016	Jun. 30, 2016	Mar. 04, 2016	Mar. 03, 2016
Subsequent Event [Line Items]
Shares Distributed				137,016,712
Price percentage on notes that are required to be offered for repurchase		101.00%	101.00%
Senior notes default redemption minimum principal as percentage of principal outstanding (at least)		25.00%	25.00%
Capacity of securitization program					$ 110,000,000
2016 Credit Agreement \| LIBOR
Subsequent Event [Line Items]
Spreads for LIBOR and prime borrowings	4.75%		4.75%
Debt instrument basis spread on variable rate, floor	1.00%		1.00%
2016 Credit Agreement \| LIBOR \| Interest Rate Below Market Reduction [Member]
Subsequent Event [Line Items]
Spreads for LIBOR and prime borrowings	1.00%
2016 Credit Agreement \| LIBOR \| Minimum
Subsequent Event [Line Items]
Spreads for LIBOR and prime borrowings	1.50%		1.50%
2016 Credit Agreement \| LIBOR \| Maximum
Subsequent Event [Line Items]
Spreads for LIBOR and prime borrowings	2.75%		2.75%
2016 Credit Agreement \| Revolving credit facility
Subsequent Event [Line Items]
Line of credit facility	$ 225,000,000			$ 225,000,000
2016 Credit Agreement \| Letter of Credit
Subsequent Event [Line Items]
Line of credit facility	20,000,000			20,000,000
2016 Credit Agreement \| Swingline Loan
Subsequent Event [Line Items]
Line of credit facility	40,000,000			40,000,000
Senior Notes and 2016 Credit Agreement
Subsequent Event [Line Items]
Face amount of debt	$ 975,000,000			$ 975,000,000	$ 975,000,000
Quarterly principal payments, percentage of original principal balance	0.25%			0.25%
Mandatory payment required following receipt of net cash proceeds from issuance or incurrence of additional debt	50.00%			50.00%
Senior Notes and 2016 Credit Agreement \| Less than or equal to 4.50 to 1 but greater than 4.00 to 1
Subsequent Event [Line Items]
Mandatory payment required following receipt of net cash proceeds from issuance or incurrence of additional debt	25.00%			25.00%
Senior Notes and 2016 Credit Agreement \| less than or equal to 4.00 to 1
Subsequent Event [Line Items]
Mandatory payment required following receipt of net cash proceeds from issuance or incurrence of additional debt	0.00%			0.00%
Senior Notes due 2024
Subsequent Event [Line Items]
Face amount of debt		$ 425,000,000
Interest rate, stated percentage (as a percent)		9.50%