Debt issuance costs-Writeoff

No definition available.

Name:	hsc_DebtissuancecostsWriteoff
Namespace Prefix:	hsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Letter of credit subfacility, maximum borrowing capacity

+ References

No definition available.

+ Details

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Namespace Prefix:	hsc_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

[Line Items] for Long term debt [Table]

+ References

No definition available.

+ Details

Name:	hsc_LongtermdebtLineItems
Namespace Prefix:	hsc_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

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

+ References

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-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
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+ Details

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

- Definition

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

+ References

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-Name Accounting Standards Codification
-Topic 210
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-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(1))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

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

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02.22(a)(2))
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+ Details

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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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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+ Details

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Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Difference between the fair value of payments made and the carrying amount of debt which is extinguished prior to maturity.

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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+ Details

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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

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Including the current and noncurrent portions, carrying value as of the balance sheet date of Notes with the highest claim on the assets of the issuer in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle if longer). Senior note holders are paid off in full before any payments are made to junior note holders.

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Period Type:	instant

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Debt Obligations Debt Footnote Disclosures (Details) - USD ($)	6 Months Ended		12 Months Ended					36 Months Ended
	Dec. 31, 2019	Jun. 30, 2019	Jul. 14, 2026	Jul. 14, 2024	Jul. 14, 2023	Dec. 31, 2018	Dec. 31, 2017	Jul. 14, 2022	Nov. 01, 2019	Sep. 30, 2019	Jul. 01, 2019	Feb. 01, 2017	Apr. 01, 2015	Jan. 01, 2013	Mar. 01, 2012
Long term debt [Line Items]
Line of Credit Facility, Remaining Borrowing Capacity						$ 165,000,000
Line of Credit Facility, Maximum Borrowing Capacity											$ 350,000,000
Letter of credit subfacility, maximum borrowing capacity											0
Debt issuance costs-Write-off						(29,000,000)
Loss on extinguishment of debt	$ 0	$ 0				$ 0	$ (3,000,000)
13.75% Senior Secured Notes due 2022 [Member]
Long term debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.00%					13.75%				13.75%
Debt Instrument, Face Amount												$ 225,000,000
Debt Instrument, Maturity Date						Feb. 01, 2022
6.625% First Priority Senior Notes Due 2020 [Member]
Long term debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.00%					6.625%				6.625%
Debt Instrument, Face Amount														$ 1,100,000,000	$ 450,000,000
Debt Instrument, Maturity Date						Apr. 15, 2020
10.00% First Priority Senior Notes Due 2020 [Member]
Long term debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.00%					10.00%				10.00%
Debt Instrument, Face Amount													$ 315,000,000
Debt Instrument, Maturity Date						Apr. 15, 2020
Senior Secured Term Loan - USD due 2026 [Domain]
Long term debt [Line Items]
Senior Notes											725,000,000
Debt Instrument, Interest Rate, Stated Percentage	5.82%
Senior Secured Term Loan - EUR due 2026 [Domain]
Long term debt [Line Items]
Senior Notes											$ 425,000,000
Debt Instrument, Interest Rate, Stated Percentage	4.00%
7.875% Senior Secured Notes due 2027 [Domain]
Long term debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	7.875%										7.875%
9.00% Second-Priority Senior Secured Notes Due 2020 [Member]
Long term debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.00%					9.00%				9.00%
Debt Instrument, Face Amount									$ 574,000,000
Debt Instrument, Maturity Date						Nov. 15, 2020
10.375% First-Priority Senion Secured Notes due 2022 [Member]
Long term debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.00%					10.375%
Debt Instrument, Face Amount												$ 560,000,000
Debt Instrument, Maturity Date						Feb. 01, 2022
9.2% Debentures Due 2021 [Member]
Long term debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.00%					9.20%				9.20%
Debt Instrument, Face Amount						$ 74,000,000
Debt Instrument, Maturity Date						Mar. 15, 2021
7.875% Debentures Due 2023 [Member]
Long term debt [Line Items]
Debt Instrument, Interest Rate, Stated Percentage	0.00%					7.875%				7.875%
Debt Instrument, Face Amount						$ 189,000,000
Debt Instrument, Maturity Date						Feb. 15, 2023
Forecast [Member]
Long term debt [Line Items]
Debt Instrument, Redemption Price, Percentage			100.00%	101.969%	103.938%			107.875%