Stock Repurchase Program, Number Of Transactions

No definition available.

Name:	chgg_StockRepurchaseProgramNumberOfTransactions
Namespace Prefix:	chgg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Stock Repurchased And Retired During Period, Number Of Business Days For Delivery

+ References

No definition available.

+ Details

Name:	chgg_StockRepurchasedAndRetiredDuringPeriodNumberOfBusinessDaysForDelivery
Namespace Prefix:	chgg_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Stock Repurchased and Retired During Period, Percent Of Fixed Amount

+ References

No definition available.

+ Details

Name:	chgg_StockRepurchasedAndRetiredDuringPeriodPercentOfFixedAmount
Namespace Prefix:	chgg_
Data Type:	dtr-types:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The cash outflow to reacquire common stock during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 15
-Subparagraph (a)
-URI https://asc.fasb.org/extlink&oid=126954810&loc=d3e3291-108585

+ Details

Name:	us-gaap_PaymentsForRepurchaseOfCommonStock
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

+ Details

Name:	us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Number of shares that have been repurchased and retired during the period.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(28))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.3-04)
-URI https://asc.fasb.org/extlink&oid=120397183&loc=d3e187085-122770

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(29))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section 50
-Paragraph 2
-URI https://asc.fasb.org/extlink&oid=126973232&loc=d3e21463-112644

+ Details

Name:	us-gaap_StockRepurchasedAndRetiredDuringPeriodShares
Namespace Prefix:	us-gaap_
Data Type:	xbrli:sharesItemType
Balance Type:	na
Period Type:	duration

- Definition

Total cost of shares repurchased divided by the total number of shares repurchased.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 30
-Section 45
-Paragraph 1
-URI https://asc.fasb.org/extlink&oid=6405813&loc=d3e23239-112655

+ Details

Name:	us-gaap_TreasuryStockAcquiredAverageCostPerShare
Namespace Prefix:	us-gaap_
Data Type:	dtr-types:perShareItemType
Balance Type:	na
Period Type:	duration

- Details

Name:	us-gaap_ShareRepurchaseProgramAxis=chgg_A2022ASRMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShareRepurchaseProgramAxis=chgg_A2021ASRMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Stockholders' Equity - Accelerated Share Repurchase (Details) $ / shares in Units, $ in Thousands			3 Months Ended	4 Months Ended	9 Months Ended
	Feb. 22, 2022 USD ($) transaction day shares	Dec. 03, 2021 USD ($)	Sep. 30, 2022 shares	Jun. 30, 2022 $ / shares shares	Sep. 30, 2022 USD ($) shares	Sep. 30, 2021 USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase price					$ 323,528	$ 0
2022 ASR
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of transactions \| transaction	2
Purchase price	$ 300,000
Stock repurchased and retired during period, shares (in shares) \| shares	8,562,255		837,001	9,399,256
Stock repurchased and retired during period, number of business days for delivery \| day	3
Stock repurchased and retired during period, percentage	80.00%
Stock repurchased and retired during the period, weighted-average price (in dollars per share) \| $ / shares				$ 31.9174
2021 ASR
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Purchase price		$ 300,000
Stock repurchased and retired during period, shares (in shares) \| shares					2,163,219