No definition available

No definition available.

Name:	mpln_DeferredUnderwritingDiscountShares
Namespace Prefix:	mpln_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The carrying value of deferred underwriting fee payable.

+ References

No definition available.

+ Details

Name:	mpln_DeferredUnderwritingFeesPayable
Namespace Prefix:	mpln_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

The deferred Underwriting fee payable per unit.

+ References

No definition available.

+ Details

Name:	mpln_DeferredUnderwritingFeesPayablePerUnit
Namespace Prefix:	mpln_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Reduction of upfront underwriting payment

+ References

No definition available.

+ Details

Name:	mpln_DeferredUnderwritingUpfrontPayment
Namespace Prefix:	mpln_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

The strike price of warrants.

+ References

No definition available.

+ Details

Name:	mpln_WarrantStrikePrice
Namespace Prefix:	mpln_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Face amount or stated value per share of common stock.

+ References

+ Details

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

- Definition

The price per share of the conversion feature embedded in the debt instrument.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 470
-SubTopic 20
-Section 50
-Paragraph 5
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031898-161870

+ Details

Name:	us-gaap_DebtInstrumentConvertibleConversionPrice1
Namespace Prefix:	us-gaap_
Data Type:	num:perShareItemType
Balance Type:	na
Period Type:	instant

- Definition

Face (par) amount of debt instrument at time of issuance.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 45
-Paragraph 2
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28551-108399

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 835
-SubTopic 30
-Section 55
-Paragraph 8
-URI http://asc.fasb.org/extlink&oid=114775985&loc=d3e28878-108400

+ Details

Name:	us-gaap_DebtInstrumentFaceAmount
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Contractual interest rate for funds borrowed, under the debt agreement.

+ References

+ Details

Name:	us-gaap_DebtInstrumentInterestRateStatedPercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Amount, after accumulated amortization, of debt issuance costs. Includes, but is not limited to, legal, accounting, underwriting, printing, and registration costs.

+ 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 210.5-02.17)
-URI http://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 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=119993939&loc=d3e28555-108399

+ Details

Name:	us-gaap_DeferredFinanceCostsNet
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

- Details

Name:	us-gaap_TypeOfArrangementAxis=mpln_ConvertibleSubscriptionAgreementsMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=mpln_ConvertibleSeniorPikToggleNotesMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MinimumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	srt_RangeAxis=srt_MaximumMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_StatementClassOfStockAxis=us-gaap_CommonClassAMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

COMMITMENTS (Details) - USD ($)	Feb. 13, 2020	Sep. 30, 2020	Jul. 31, 2020	Dec. 31, 2019
Deferred Underwriting Fees Payable Per Unit		$ 0.35
Deferred Underwriting Fees Payable		$ 38,500,000
Deferred Underwriting Discount Shares	$ 17,990,000
Deferred Underwriting Upfront Payment	$ 3,598,000
Debt Issuance Costs, Net		$ 0		$ 284,930
Conversion price		$ 1.00
Subscription Agreements \| Convertible Notes
Debt Instrument, Face Amount			$ 1,300,000,000
Subscription Agreements \| Convertible Notes \| Minimum
Interest rate			6.00%
Subscription Agreements \| Convertible Notes \| Maximum
Interest rate			7.00%
Class A common stock
Par value per share		$ 0.0001		$ 0.0001
Class A common stock \| Subscription Agreements
Strike price of warrants			$ 12.50