Date when the debt instrument is scheduled to be fully repaid.

No definition available.

Name:	ck0001754301_DebtInstrumentMaturityYear
Namespace Prefix:	ck0001754301_
Data Type:	xbrli:gYearItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt instrument percentage of ninety days duration fee payment.

+ References

No definition available.

+ Details

Name:	ck0001754301_DebtInstrumentPercentageOfNinetyDaysDurationFeePayment
Namespace Prefix:	ck0001754301_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt instrument percentage of one hundred eighty days duration fee payment.

+ References

No definition available.

+ Details

Name:	ck0001754301_DebtInstrumentPercentageOfOneHundredEightyDaysDurationFeePayment
Namespace Prefix:	ck0001754301_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Debt instrument percentage of two hundred seventy days duration fee payment.

+ References

No definition available.

+ Details

Name:	ck0001754301_DebtInstrumentPercentageOfTwoHundredSeventyDaysDurationFeePayment
Namespace Prefix:	ck0001754301_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Maturity extension number of one year periods.

+ References

No definition available.

+ Details

Name:	ck0001754301_MaturityExtensionNumberOfOneYearPeriods
Namespace Prefix:	ck0001754301_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

- Definition

Sublimit for maximum amount of letters of credit issuable under the revolving credit facility.

+ References

No definition available.

+ Details

Name:	ck0001754301_SubLimitOnUnsecuredRevolvingCreditFacility
Namespace Prefix:	ck0001754301_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Percentage points added to the reference rate to compute the variable rate on the debt instrument.

+ References

No definition available.

+ Details

Name:	us-gaap_DebtInstrumentBasisSpreadOnVariableRate1
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

The reference rate for the variable rate of the debt instrument, such as LIBOR or the US Treasury rate and the maturity of the reference rate used, such as three months or six months LIBOR.

+ References

No definition available.

+ Details

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

- 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=114775744&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

Date the debt instrument was issued, in CCYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_DebtInstrumentIssuanceDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
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_DebtInstrumentLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

The carrying value as of the balance sheet date of the current and noncurrent portions of long-term obligations drawn from a line of credit, which is a bank's commitment to make loans up to a specific amount. Examples of items that might be included in the application of this element may consist of letters of credit, standby letters of credit, and revolving credit arrangements, under which borrowings can be made up to a maximum amount as of any point in time conditional on satisfaction of specified terms before, as of and after the date of drawdowns on the line. Includes short-term obligations that would normally be classified as current liabilities but for which (a) postbalance sheet date issuance of a long term obligation to refinance the short term obligation on a long term basis, or (b) the enterprise has entered into a financing agreement that clearly permits the enterprise to refinance the short-term obligation on a long term basis and the following conditions are met (1) the agreement does not expire within 1 year and is not cancelable by the lender except for violation of an objectively determinable provision, (2) no violation exists at the BS date, and (3) the lender has entered into the financing agreement is expected to be financially capable of honoring the agreement.

+ 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(22))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(16))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(16))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

+ Details

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

- Definition

The fee, expressed as a percentage of the line of credit facility, for the line of credit facility regardless of whether the facility has been used.

+ References

No definition available.

+ Details

Name:	us-gaap_LineOfCreditFacilityCommitmentFeePercentage
Namespace Prefix:	us-gaap_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	duration

- Definition

Amount of current borrowing capacity under the credit facility considering any current restrictions on the amount that could be borrowed (for example, borrowings may be limited by the amount of current assets), but without considering any amounts currently outstanding under the facility.

+ References

+ Details

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

- Definition

Date the credit facility terminates, in CCYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityExpirationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Date the credit facility first became available, in CCYY-MM-DD format.

+ References

+ Details

Name:	us-gaap_LineOfCreditFacilityInitiationDate1
Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- Definition

Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

+ Details

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

- Definition

The cash inflow from a borrowing with the highest claim on the assets of the entity in case of bankruptcy or liquidation (with maturities initially due after one year or beyond the operating cycle, if longer).

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 14
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3255-108585

+ Details

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

- Definition

Reflects the total carrying amount as of the balance sheet date of debt having initial terms less than one year or the normal operating cycle, if longer.

+ 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(19)(a))
-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 944
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.7-03(a)(16)(a)(1))
-URI http://asc.fasb.org/extlink&oid=6879938&loc=d3e572229-122910

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 942
-SubTopic 210
-Section S99
-Paragraph 1
-Subparagraph (SX 210.9-03(13))
-URI http://asc.fasb.org/extlink&oid=6876686&loc=d3e534808-122878

+ Details

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

- Details

Name:	us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_ShortTermDebtTypeAxis=us-gaap_BridgeLoanMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_VariableRateAxis=us-gaap_LondonInterbankOfferedRateLIBORMember
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_CreditFacilityAxis=us-gaap_RevolvingCreditFacilityMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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

- Details

Name:	us-gaap_DebtInstrumentAxis=ck0001754301_ThreePointSixHundredSixtySixPercentDueTwoThousandTwentyTwoMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ck0001754301_FourPointZeroThreeZeroPercentDueTwoThousandTwentyFourMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ck0001754301_FourPointSevenZeroNinePercentDueTwoThousandTwentyNineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ck0001754301_FivePointFourSevenSixPercentDueTwoThousandThirtyNineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_DebtInstrumentAxis=ck0001754301_FivePointFiveSevenSixPercentDueTwoThousandFortyNineMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

Borrowings (Narrative) (Details) - Subsequent Event		1 Months Ended
Borrowings (Narrative) (Details) - Subsequent Event	Mar. 15, 2019 USD ($) OneYearPeriod	Jan. 31, 2019 USD ($)	Mar. 18, 2019 USD ($)
Bridge Credit Agreement
Debt Instrument [Line Items]
Limit on revolving credit facility	$ 1,700,000,000
Line of credit facility, commitment fee percentage	0.125%
Debt instrument, percentage of ninety days duration fee payment	0.50%
Debt instrument, percentage of one hundred eighty days duration fee payment	0.75%
Debt instrument, percentage of two hundred seventy days duration fee payment	1.00%
Loans funded			$ 0
LIBOR \| Bridge Credit Agreement \| Minimum [Member]
Debt Instrument [Line Items]
Debt instrument variable interest rate	1.25%
LIBOR \| Bridge Credit Agreement \| Maximum
Debt Instrument [Line Items]
Debt instrument variable interest rate	2.00%
Revolving Credit Agreement
Debt Instrument [Line Items]
Credit facility, agreement date	Mar. 15, 2019
Limit on revolving credit facility	$ 1,000,000,000
Sub-limit for maximum amount of letters of credit issuable under revolving credit facility	$ 150,000,000
Credit facility maturity date	Mar. 31, 2024
Line of credit facility, maximum borrowing capacity	$ 1,500,000,000
Maturity extension number of one year periods \| OneYearPeriod	2
Description of debt instrument variable rate basis	Given the current credit ratings, the interest rate on borrowings under the Revolving Credit Agreement would be London Interbank Offered Rate (“LIBOR”) plus 1.1% and the facility fee is 0.15%.
Line of credit facility, commitment fee percentage	0.15%
Borrowings outstanding			$ 0
Revolving Credit Agreement \| LIBOR
Debt Instrument [Line Items]
Debt instrument variable interest rate	1.10%
Senior Notes
Debt Instrument [Line Items]
Senior notes, issuance date		Jan. 31, 2019
Net proceeds from issuance of senior notes		$ 6,800,000,000
Senior Notes \| 3.666% Due 2022
Debt Instrument [Line Items]
Face amount of debt instrument		$ 750,000,000
Stated interest rate of debt instrument		3.666%
Senior notes, maturity year		2022
Senior Notes \| 4.030% Due 2024
Debt Instrument [Line Items]
Face amount of debt instrument		$ 1,250,000,000
Stated interest rate of debt instrument		4.03%
Senior notes, maturity year		2024
Senior Notes \| 4.709% Due 2029
Debt Instrument [Line Items]
Face amount of debt instrument		$ 2,000,000,000
Stated interest rate of debt instrument		4.709%
Senior notes, maturity year		2029
Senior Notes \| 5.476% Due 2039
Debt Instrument [Line Items]
Face amount of debt instrument		$ 1,250,000,000
Stated interest rate of debt instrument		5.476%
Senior notes, maturity year		2039
Senior Notes \| 5.576% Due 2049
Debt Instrument [Line Items]
Face amount of debt instrument		$ 1,550,000,000
Stated interest rate of debt instrument		5.576%
Senior notes, maturity year		2049