BORROWINGS (Letter of Credit Facility) (Details) - USD ($)	Dec. 28, 2016	Aug. 24, 2017	Jul. 29, 2017	Jan. 28, 2017
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity			$ 1,500,000,000.0
Esl Investments Inc
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity				$ 500,000,000
Esl Investments Inc | Line of credit loans
Line of Credit Facility [Line Items]
Line of credit facility, maximum borrowing capacity	$ 500,000,000
Letters of credit outstanding, amount			271,000,000	$ 200,000,000
Portion syndicated to unaffiliated third party lenders			$ 140,000,000
Cash collateral, percent of commitment	102.00%
Funding fee, percentage of amounts drawn	1.00%
Eurodollar | Esl Investments Inc | Line of credit loans
Line of Credit Facility [Line Items]
Debt instrument, basis spread on variable rate	11.00%
Subsequent Event | Esl Investments Inc | Line of credit loans
Line of Credit Facility [Line Items]
Letters of credit outstanding, amount		$ 271,000,000
Portion syndicated to unaffiliated third party lenders		$ 140,000,000