Debt Instrument, Covenant, Fixed Charge Coverage Ratio

No definition available.

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- Definition

Debt Instrument, Covenant Trigger, Maximum Excess Availability Amount

+ References

No definition available.

+ Details

Name:	aci_DebtInstrumentCovenantTriggerMaximumExcessAvailabilityAmount
Namespace Prefix:	aci_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Debt Instrument, Covenant Trigger, Maximum Excess Availability, Percentage Of Borrowing

+ References

No definition available.

+ Details

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- Definition

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

+ References

No definition available.

+ Details

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- 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

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- Definition

Amount, before 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 835
-SubTopic 30
-Section 45
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=114775744&loc=d3e28555-108399

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Period Type:	instant

- Definition

The total amount of the contingent obligation under letters of credit outstanding as of the reporting date.

+ References

No definition available.

+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- 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
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+ Details

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Balance Type:	credit
Period Type:	instant

- 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

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Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

- Definition

Amount of cash inflow from contractual arrangement with the lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ 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
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+ Details

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Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

Amount of cash outflow for payment of an obligation from a lender, including but not limited to, letter of credit, standby letter of credit and revolving credit arrangements.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
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+ Details

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

- Details

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Period Type:

- Details

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- Details

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- Details

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- Details

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- Details

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LONG-TERM DEBT - Asset-Based Loan Facilities (Details)	Dec. 02, 2018 USD ($)	Nov. 16, 2018 USD ($)	Aug. 09, 2016 USD ($)	Jun. 22, 2016 USD ($)	Dec. 21, 2015 USD ($)	Feb. 23, 2019 USD ($)	Feb. 24, 2018 USD ($)
Debt Instrument [Line Items]
Outstanding balance on letters of credit						$ 143,000,000.0	$ 205,600,000
Line of credit \| Asset-Based Loan Facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 4,000,000,000.0
Capitalized financing costs		13,500,000
Proceeds from lines of credit		$ 410,000,000		$ 300,000,000.0
Repayments of lines of credit	$ 610,000,000.0		$ 470,000,000.0
Amount of outstanding borrowings						0	0
Covenant triggering threshold, percentage of aggregate commitments					10.00%
Covenant triggering threshold, excess availability amount					$ 250,000,000.0
Debt covenant, fixed charge coverage ratio					1.0
Line of credit \| Asset-Based Loan Facility \| Minimum
Debt Instrument [Line Items]
Basis spread on variable rate		1.25%
Line of credit \| Asset-Based Loan Facility \| Maximum
Debt Instrument [Line Items]
Basis spread on variable rate		1.75%
Letter of credit \| LOC Sub-facility
Debt Instrument [Line Items]
Maximum borrowing capacity		$ 1,975,000,000.0
Outstanding balance on letters of credit						$ 520,800,000	$ 576,800,000