Label	Element	Value
Elimination of Predecessor Equity	hsc_EliminationofPredecessorEquity	$ 0
Elimination of Predecessor AOCI	hsc_EliminationofPredecessorAOCI	26,000,000
Stock Issued During Period, Value, New Issues	us-gaap_StockIssuedDuringPeriodValueNewIssues	1,157,000,000
UNITED STATES | Pension Plan [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	us-gaap_DefinedBenefitPlanFundedStatusOfPlan	(32,000,000)
UNITED STATES | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	us-gaap_DefinedBenefitPlanFundedStatusOfPlan	0
Foreign Plan [Member] | Pension Plan [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	us-gaap_DefinedBenefitPlanFundedStatusOfPlan	(208,000,000)
Foreign Plan [Member] | Other Postretirement Benefits Plan [Member]
Defined Benefit Plan, Funded (Unfunded) Status of Plan	us-gaap_DefinedBenefitPlanFundedStatusOfPlan	(17,000,000)
Parent [Member]
Elimination of Predecessor Equity	hsc_EliminationofPredecessorEquity	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1,157,000,000
Net Income (Loss) Attributable to Parent	us-gaap_NetIncomeLoss	2,894,000,000
Elimination of Predecessor AOCI	hsc_EliminationofPredecessorAOCI	26,000,000
Stock Issued During Period, Value, New Issues	us-gaap_StockIssuedDuringPeriodValueNewIssues	1,157,000,000
Common Stock [Member]
Elimination of Predecessor Equity	hsc_EliminationofPredecessorEquity	(1,000,000)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	0
Net Income (Loss) Attributable to Parent	us-gaap_NetIncomeLoss	0
Elimination of Predecessor AOCI	hsc_EliminationofPredecessorAOCI	0
Stock Issued During Period, Value, New Issues	us-gaap_StockIssuedDuringPeriodValueNewIssues	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	0
Treasury Stock [Member]
Elimination of Predecessor Equity	hsc_EliminationofPredecessorEquity	296,000,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	0
Net Income (Loss) Attributable to Parent	us-gaap_NetIncomeLoss	0
Elimination of Predecessor AOCI	hsc_EliminationofPredecessorAOCI	0
Stock Issued During Period, Value, New Issues	us-gaap_StockIssuedDuringPeriodValueNewIssues	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	0
Retained Earnings [Member]
Elimination of Predecessor Equity	hsc_EliminationofPredecessorEquity	231,000,000
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	0
Net Income (Loss) Attributable to Parent	us-gaap_NetIncomeLoss	2,894,000,000
Elimination of Predecessor AOCI	hsc_EliminationofPredecessorAOCI	0
Stock Issued During Period, Value, New Issues	us-gaap_StockIssuedDuringPeriodValueNewIssues	0
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	0
Additional Paid-in Capital [Member]
Elimination of Predecessor Equity	hsc_EliminationofPredecessorEquity	(526,000,000)
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	1,157,000,000
Net Income (Loss) Attributable to Parent	us-gaap_NetIncomeLoss	0
Elimination of Predecessor AOCI	hsc_EliminationofPredecessorAOCI	0
Stock Issued During Period, Value, New Issues	us-gaap_StockIssuedDuringPeriodValueNewIssues	1,157,000,000
Other Comprehensive Income (Loss), Net of Tax, Portion Attributable to Parent	us-gaap_OtherComprehensiveIncomeLossNetOfTaxPortionAttributableToParent	0
Noncontrolling Interest [Member]
Elimination of Predecessor Equity	hsc_EliminationofPredecessorEquity	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	(1,000,000)
Net Income (Loss) Attributable to Noncontrolling Interest	us-gaap_NetIncomeLossAttributableToNoncontrollingInterest	1,000,000
Elimination of Predecessor AOCI	hsc_EliminationofPredecessorAOCI	0
Stock Issued During Period, Value, New Issues	us-gaap_StockIssuedDuringPeriodValueNewIssues	0
AOCI Attributable to Parent [Member]
Other Comprehensive Income (Loss), Net of Tax	us-gaap_OtherComprehensiveIncomeLossNetOfTax	(8,000,000)
Elimination of Predecessor Equity	hsc_EliminationofPredecessorEquity	0
Stockholders' Equity, Including Portion Attributable to Noncontrolling Interest	us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest	0
Net Income (Loss) Attributable to Parent	us-gaap_NetIncomeLoss	0
Elimination of Predecessor AOCI	hsc_EliminationofPredecessorAOCI	26,000,000
Stock Issued During Period, Value, New Issues	us-gaap_StockIssuedDuringPeriodValueNewIssues	$ 0