Expense Example, No Redemption - FidelityAdvisorStrategicIncomeFund-AMCIZPRO - FidelityAdvisorStrategicIncomeFund-AMCIZPRO - Fidelity Advisor Strategic Income Fund	Mar. 01, 2025 USD ($)
Fidelity Advisor Strategic Income Fund - Class A
Expense Example, No Redemption:
1 Year	$ 492
3 Years	688
5 Years	899
10 Years	1,509
Fidelity Advisor Strategic Income Fund - Class C
Expense Example, No Redemption:
1 Year	172
3 Years	533
5 Years	918
10 Years	1,799
Fidelity Advisor Strategic Income Fund - Class M
Expense Example, No Redemption:
1 Year	492
3 Years	688
5 Years	899
10 Years	1,509
Fidelity Advisor Strategic Income Fund - Class I
Expense Example, No Redemption:
1 Year	70
3 Years	221
5 Years	384
10 Years	859
Fidelity Advisor Strategic Income Fund - Class Z
Expense Example, No Redemption:
1 Year	60
3 Years	189
5 Years	329
10 Years	$ 738

No definition available.

Name:	rr_ExpenseExampleNoRedemptionAbstract
Namespace Prefix:	rr_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

You would pay the following expenses if you did not redeem your shares. Include the second 1-, 3-, 5-, and 10-year periods and related narrative explanation only if a sales charge (load) or other fee is charged upon redemption.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 3
-Subsection example
-Paragraph 2
-Subparagraph 1

+ Details

Name:	rr_ExpenseExampleNoRedemptionYear01
Namespace Prefix:	rr_
Data Type:	rr:NonNegativeMonetaryType
Balance Type:	na
Period Type:	duration

- Definition

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 3
-Subsection example
-Paragraph 2
-Subparagraph 1

+ Details

Name:	rr_ExpenseExampleNoRedemptionYear03
Namespace Prefix:	rr_
Data Type:	rr:NonNegativeMonetaryType
Balance Type:	na
Period Type:	duration

- Definition

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 3
-Subsection instructions
-Paragraph 4
-Subparagraph f

+ Details

Name:	rr_ExpenseExampleNoRedemptionYear05
Namespace Prefix:	rr_
Data Type:	rr:NonNegativeMonetaryType
Balance Type:	na
Period Type:	duration

- Definition

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher SEC
-Name Form N-1A
-Section 3
-Subsection instructions
-Paragraph 4
-Subparagraph f

+ Details

Name:	rr_ExpenseExampleNoRedemptionYear10
Namespace Prefix:	rr_
Data Type:	rr:NonNegativeMonetaryType
Balance Type:	na
Period Type:	duration

- Details

Name:	dei_DocumentInformationDocumentAxis=fmr_FidelityAdvisorStrategicIncomeFund-AMCIZPROMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	dei_LegalEntityAxis=fmr_S000005152Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	rr_ProspectusShareClassAxis=fmr_C000014110Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	rr_ProspectusShareClassAxis=fmr_C000014112Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	rr_ProspectusShareClassAxis=fmr_C000014113Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	rr_ProspectusShareClassAxis=fmr_C000014114Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	rr_ProspectusShareClassAxis=fmr_C000204998Member
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type: