Debt Instrument, Restrictive Covenants, Restricted Payment Capacity

No definition available.

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Namespace Prefix:	chdn_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Area of land held.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

Cash received on stock transaction after deduction of issuance costs.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

The number of shares issued or sold by the subsidiary or equity method investee per stock transaction.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	duration

- Definition

Per share amount received by subsidiary or equity investee for each share of common stock issued or sold in the stock transaction.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

+ References

No definition available.

+ Details

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_LongtermDebtTypeAxis=us-gaap_LineOfCreditMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_CounterpartyNameAxis=chdn_AffiliateOfDuchossoisGroupIncMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Subsequent Events (Details) $ / shares in Units, shares in Millions, $ in Millions	Feb. 01, 2021 USD ($) $ / shares shares	Apr. 28, 2020 USD ($)	Feb. 23, 2021 a
Revolving Credit Facility \| Line of Credit
Subsequent Event [Line Items]
Debt covenant, restricted payments		$ 26.0
Subsequent Event \| Disposal Group, Held-for-sale, Not Discontinued Operations \| Arlington Park
Subsequent Event [Line Items]
Area of land sold \| a			326
Subsequent Event \| Revolving Credit Facility \| Line of Credit
Subsequent Event [Line Items]
Debt covenant, restricted payments	$ 226.0
Subsequent Event \| Private Placement
Subsequent Event [Line Items]
Stock repurchase (in shares) \| shares	1
Stock repurchase price (in dollars per share) \| $ / shares	$ 193.94
Subsequent Event \| Private Placement \| Affiliate Of Duchossois Group, Inc.
Subsequent Event [Line Items]
Aggregate purchase price	$ 193.9