Label	Element	Value
Risk Return Abstract	rr_RiskReturnAbstract
Document Type	dei_DocumentType	497
Document Period End Date	dei_DocumentPeriodEndDate	Dec. 30, 2015
Registrant Name	dei_EntityRegistrantName	PUTNAM FUNDS TRUST
Central Index Key	dei_EntityCentralIndexKey	0001005942
Amendment Flag	dei_AmendmentFlag	false
Trading Symbol	dei_TradingSymbol	PFT
Document Creation Date	dei_DocumentCreationDate	Sep. 01, 2016
Putnam Retirement Income Fund Lifestyle 2
Risk Return Abstract	rr_RiskReturnAbstract
Operating Expenses Caption [Text]	rr_OperatingExpensesCaption	Annual fund operating expenses (expenses you pay each year as a percentage of the value of your investment)
Fee Waiver or Reimbursement over Assets, Date of Termination	rr_FeeWaiverOrReimbursementOverAssetsDateOfTermination	Dec. 30, 2016
Putnam Retirement Income Fund Lifestyle 2 | Class A
Risk Return Abstract	rr_RiskReturnAbstract
Management fees	rr_ManagementFeesOverAssets	0.29%
Distribution and Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.25%
Other expenses	rr_OtherExpensesOverAssets	1.34%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.30%	[1]
Total annual fund operating expenses	rr_ExpensesOverAssets	2.18%
Expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(1.18%)	[2]
Total annual fund operating expenses after expense reimbursement	rr_NetExpensesOverAssets	1.00%
Putnam Retirement Income Fund Lifestyle 2 | Class B
Risk Return Abstract	rr_RiskReturnAbstract
Management fees	rr_ManagementFeesOverAssets	0.29%
Distribution and Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other expenses	rr_OtherExpensesOverAssets	1.34%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.30%	[1]
Total annual fund operating expenses	rr_ExpensesOverAssets	2.93%
Expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(1.18%)	[2]
Total annual fund operating expenses after expense reimbursement	rr_NetExpensesOverAssets	1.75%
Putnam Retirement Income Fund Lifestyle 2 | Class C
Risk Return Abstract	rr_RiskReturnAbstract
Management fees	rr_ManagementFeesOverAssets	0.29%
Distribution and Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	1.00%
Other expenses	rr_OtherExpensesOverAssets	1.34%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.30%	[1]
Total annual fund operating expenses	rr_ExpensesOverAssets	2.93%
Expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(1.18%)	[2]
Total annual fund operating expenses after expense reimbursement	rr_NetExpensesOverAssets	1.75%
Putnam Retirement Income Fund Lifestyle 2 | Class M
Risk Return Abstract	rr_RiskReturnAbstract
Management fees	rr_ManagementFeesOverAssets	0.29%
Distribution and Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.50%
Other expenses	rr_OtherExpensesOverAssets	1.34%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.30%	[1]
Total annual fund operating expenses	rr_ExpensesOverAssets	2.43%
Expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(1.18%)	[2]
Total annual fund operating expenses after expense reimbursement	rr_NetExpensesOverAssets	1.25%
Putnam Retirement Income Fund Lifestyle 2 | Class R
Risk Return Abstract	rr_RiskReturnAbstract
Management fees	rr_ManagementFeesOverAssets	0.29%
Distribution and Service (12b-1) Fees	rr_DistributionAndService12b1FeesOverAssets	0.50%
Other expenses	rr_OtherExpensesOverAssets	1.34%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.30%	[1]
Total annual fund operating expenses	rr_ExpensesOverAssets	2.43%
Expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(1.18%)	[2]
Total annual fund operating expenses after expense reimbursement	rr_NetExpensesOverAssets	1.25%
Putnam Retirement Income Fund Lifestyle 2 | Class Y
Risk Return Abstract	rr_RiskReturnAbstract
Management fees	rr_ManagementFeesOverAssets	0.29%
Other expenses	rr_OtherExpensesOverAssets	1.34%
Acquired fund fees and expenses	rr_AcquiredFundFeesAndExpensesOverAssets	0.30%	[1]
Total annual fund operating expenses	rr_ExpensesOverAssets	1.93%
Expense reimbursement	rr_FeeWaiverOrReimbursementOverAssets	(1.18%)	[2]
Total annual fund operating expenses after expense reimbursement	rr_NetExpensesOverAssets	0.75%

[1] Acquired fund fees and expenses are based on projected net expenses of the underlying funds and assume the fund's typical allocations to the underlying funds described in Investments, risks and performance — Investments and a 4% allocation to Putnam Government Money Market Fund.

[2] Reflects Putnam Investment Management, LLC's contractual obligation to limit certain fund expenses through December 30, 2016. This obligation may be modified or discontinued only with approval of the Board of Trustees.