Label

Element

Value

Prospectus:

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Document Type

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497

Document Period End Date

dei_DocumentPeriodEndDate

Feb. 28, 2020

Entity Registrant Name

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AMERICAN CENTURY CAPITAL PORTFOLIOS INC

Central Index Key

dei_EntityCentralIndexKey

0000908186

Amendment Flag

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false

Document Creation Date

dei_DocumentCreationDate

Feb. 28, 2020

Document Effective Date

dei_DocumentEffectiveDate

Mar. 01, 2020

Prospectus Date

rr_ProspectusDate

Mar. 01, 2020

American Century Mutual Funds, Inc | AC ALTERNATIVES INCOME FUND

Prospectus:

rr_ProspectusTable

Supplement [Text Block]

ck0000908186_SupplementTextBlock

American Century Capital Portfolios, Inc.

Summary Prospectus and Prospectus Supplement

AC Alternatives^® Income Fund

Supplement dated March 1, 2020 n Summary Prospectus and Prospectus dated March 1, 2020

Timbercreek Investment Management (U.S.) LLC (“Timbercreek”) no longer serves as an underlying subadvisor for the fund. All references to Timbercreek in the summary prospectus and prospectus are deleted.

The following replaces the investment strategy and underlying subadvisor table in the Principal Investment Strategies section on page 4 of the summary prospectus and page 5 of the prospectus.

Investment Strategy	Sub-Strategy	Underlying Subadvisor
Alternative Credit	Opportunistic Credit	ArrowMark Colorado Holdings LLC
Alternative Credit	Structured Credit	Good Hill Partners LP
Alternative Credit	Multi-Sector Credit	Marathon Asset Management, L.P.
Alternative Equity	Real Estate	Advisor
Alternative Equity	Long/Short Equity Income	Advisor and PWP
Tactical and Hedging Strategies	Opportunistic, Hedge Overlay	Advisor and PWP

The following replaces the investment strategy and underlying subadvisor table in the Objectives, Strategies and Risks section on page 13 of the prospectus.

Investment Strategy	Sub-Strategy	Underlying Subadvisor
Alternative Credit	Opportunistic Credit	ArrowMark Colorado Holdings LLC
Alternative Credit	Structured Credit	Good Hill Partners LP
Alternative Credit	Multi-Sector Credit	Marathon Asset Management, L.P.
Alternative Equity	Real Estate	Advisor
Alternative Equity	Long/Short Equity Income	Advisor and PWP
Tactical and Hedging Strategies	Opportunistic, Hedge Overlay	Advisor and PWP

©2020 American Century Proprietary Holdings, Inc. All rights reserved.

CL-SPL-95996 2003