Shareholder Fees - TCW Total Return Bond Fund	Mar. 01, 2021 USD ($)
Class I
Shareholder Fees:
Shareholder Fee, Other	none
Class N
Shareholder Fees:
Shareholder Fee, Other	none
Plan Class
Shareholder Fees:
Shareholder Fee, Other	none

Other Expenses

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form
-Number N-1A
-Chapter A
-Section 3
-Subsection table
-Paragraph 1
-Subparagraph 10

Name:	rr_ShareholderFeeOther
Namespace Prefix:	rr_
Data Type:	rr:NonNegativeMonetaryType
Balance Type:	na
Period Type:	duration