Name:	thc_OperatingLossCarryforwardLimitationOnUseMaximumChangeIncreaseInOwnership
Namespace Prefix:	thc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

Represents the rolling period during which certain ownership changes may limit the ability of the entity for utilization of NOL carryforwards.

No definition available.

Name:	thc_OperatingLossCarryforwardLimitationOnUseMeasurementPeriod
Namespace Prefix:	thc_
Data Type:	xbrli:durationItemType
Balance Type:	na
Period Type:	duration

Represents the percent of shareholders whose ownership change limits the utilization of NOL carryforwards.

No definition available.

Name:	thc_OperatingLossCarryforwardLimitationOnUsePercentOfShareholders
Namespace Prefix:	thc_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

The amount of the tax credit carryforward, before tax effects, available to reduce future taxable income under enacted tax laws.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 740
-SubTopic 10
-Section 50
-Paragraph 3
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=65882285&loc=d3e32559-109319

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Glossary Carryforwards
-URI http://asc.fasb.org/extlink&oid=6506874

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

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.

No definition available.