Debt - Revolving Credit Agreement (Details) - USD ($)	12 Months Ended
Dec. 29, 2018	Dec. 30, 2017
ABL Senior Secured Revolving Facility
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 1,300,000,000
Revolving credit facility, outstanding amount	372,000,000
Available capacity on the ABL Facility	$ 847,000,000
Interest rate on letter of credit fees	1.25%
Revolving credit facility unused commitment fee	0.25%
Weighted-average interest rate on outstanding borrowings	5.12%	4.29%
ABL Senior Secured Revolving Facility \| Standby Letters of Credit for Self Insurance Program
Debt Instrument [Line Items]
Letters of credit, outstanding amount	$ 298,000,000
ABL Senior Secured Revolving Facility \| Other Obligations
Debt Instrument [Line Items]
Letters of credit, outstanding amount	1,000,000
ABL Senior Secured Revolving Facility \| ABL Tranche A-1
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 100,000,000
ABL Senior Secured Revolving Facility \| ABL Tranche A-1 \| ABR
Debt Instrument [Line Items]
Basis spread on variable interest rate	1.50%
ABL Senior Secured Revolving Facility \| ABL Tranche A-1 \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable interest rate	2.50%
ABL Senior Secured Revolving Facility \| ABL Tranche A
Debt Instrument [Line Items]
Maximum borrowing capacity	$ 1,200,000,000
ABL Senior Secured Revolving Facility \| ABL Tranche A \| ABR
Debt Instrument [Line Items]
Basis spread on variable interest rate	0.25%
ABL Senior Secured Revolving Facility \| ABL Tranche A \| LIBOR
Debt Instrument [Line Items]
Basis spread on variable interest rate	1.25%
ABL Senior Secured Revolving Facility \| Obligations under capital leases
Debt Instrument [Line Items]
Letters of credit, outstanding amount	$ 73,000,000
ABL Facility
Debt Instrument [Line Items]
Revolving credit facility, outstanding amount	$ 81,000,000	$ 80,000,000

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

No definition available.

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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

Weighted average interest rate of debt outstanding.

+ References

No definition available.

+ Details

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- 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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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://www.xbrl.org/2003/role/presentationRef
-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://www.xbrl.org/2003/role/presentationRef
-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

Reference 3: http://www.xbrl.org/2003/role/presentationRef
-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

+ Details

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- 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

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- 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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- Definition

Amount of borrowing capacity currently available under the credit facility (current borrowing capacity less the amount of borrowings outstanding).

+ References

+ Details

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Balance Type:	credit
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- Definition

Percentage of letter of credit fees.

+ References

No definition available.

+ Details

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