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Label Element Value
Prospectus: rr_ProspectusTable  
Document Type dei_DocumentType 497
Document Period End Date dei_DocumentPeriodEndDate Jul. 31, 2018
Entity Registrant Name dei_EntityRegistrantName AMERICAN CENTURY VARIABLE PORTFOLIOS INC
Central Index Key dei_EntityCentralIndexKey 0000814680
Amendment Flag dei_AmendmentFlag false
Document Creation Date dei_DocumentCreationDate Jul. 31, 2018
Document Effective Date dei_DocumentEffectiveDate May 01, 2018
Prospectus Date rr_ProspectusDate May 01, 2018
Variable Portfolios Prospectus | VP International Fund  
Prospectus: rr_ProspectusTable  
Supplement Text Block [Text Block] ck0000814680_SupplementTextBlockTextBlock
American Century Variable Portfolios, Inc.
Prospectus Supplement
VP International Fund
newaci_logoblk.jpg
Supplement dated August 1, 2018 n Prospectus dated May 1, 2018

The following replaces the Annual Fund Operating Expenses table on page 2 of the prospectus:
Operating Expenses Caption [Text] rr_OperatingExpensesCaption Annual Fund Operating Expenses (expenses that you pay each year as a percentage of the value of your investment)
Variable Portfolios Prospectus | VP International Fund | CLASS I  
Prospectus: rr_ProspectusTable  
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 1.34%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets none
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.35%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.32%) [1]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.03%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 105
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 397
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 710
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,595
Variable Portfolios Prospectus | VP International Fund | CLASS II  
Prospectus: rr_ProspectusTable  
Management Fees (as a percentage of Assets) rr_ManagementFeesOverAssets 1.24%
Distribution and Service (12b-1) Fees rr_DistributionAndService12b1FeesOverAssets 0.25%
Other Expenses (as a percentage of Assets): rr_OtherExpensesOverAssets 0.01%
Expenses (as a percentage of Assets) rr_ExpensesOverAssets 1.50%
Fee Waiver or Reimbursement rr_FeeWaiverOrReimbursementOverAssets (0.32%) [1]
Net Expenses (as a percentage of Assets) rr_NetExpensesOverAssets 1.18%
Expense Example, with Redemption, 1 Year rr_ExpenseExampleYear01 $ 121
Expense Example, with Redemption, 3 Years rr_ExpenseExampleYear03 443
Expense Example, with Redemption, 5 Years rr_ExpenseExampleYear05 789
Expense Example, with Redemption, 10 Years rr_ExpenseExampleYear10 $ 1,762
[1] The advisor has agreed to waive 0.32 percentage points of the fund’s management fee. The advisor expects this waiver to continue until July 31, 2019 and cannot terminate it prior to such date without the approval of the Board of Directors.