Pension Plan and Postretirement Benefits Other Than Pension (Details 2)	Dec. 31, 2014	Dec. 31, 2013
Pension Plan and Postretirement Benefits Other Than Pension
Cash (as a percent)	23.00%wdr_DefinedBenefitPlanCashSecurities	18.00%wdr_DefinedBenefitPlanCashSecurities
Equity securities:
Domestic (as a percent)	51.00%	33.00%
International (as a percent)	17.00%	40.00%
Fixed income securities (as a percent)	1.00%	1.00%
Private equity (as a percent)	1.00%	1.00%
Gold bullion (as a percent)	7.00%wdr_DefinedBenefitPlanGoldBullion	7.00%wdr_DefinedBenefitPlanGoldBullion
Percentage of plan assets allocation	100.00%	100.00%

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Percentage of fair value of investments (categorized by debt securities, equity securities, real estate and other plan assets) to the fair value of plan assets held.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 5

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e2446-114920

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (d)(1)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

+ Details

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- Definition

The percentage of the fair value of cash securities to the fair value of total plan assets held as of the measurement date.

+ References

No definition available.

+ Details

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- Definition

The percentage of the fair value of domestic equity securities to the fair value of total plan assets held as of the measurement date.

+ References

No definition available.

+ Details

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- Details

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- Definition

The percentage of the fair value of fixed income securities to the fair value of total plan assets held as of the measurement date.

+ References

No definition available.

+ Details

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- Definition

The percentage of the fair value of foreign equity securities to the fair value of total plan assets held as of the measurement date.

+ References

No definition available.

+ Details

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- Definition

The percentage of the fair value of gold bullion to the fair value of total plan assets held as of the measurement date.

+ References

No definition available.

+ Details

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- Definition

Represents the percentage of the fair value of private equity to the fair value of total plan assets held as of the measurement date.

+ References

No definition available.

+ Details

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