The fair value of assets acquired in noncash investing or financing activities.

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 4
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4313-108586

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 5
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4332-108586

Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=98513485&loc=d3e4304-108586

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

Supplemental Disclosure of Cash Flow Information (Details Textual) - USD ($) $ in Millions	3 Months Ended
	Jan. 31, 2018	Jul. 31, 2019	Feb. 01, 2018
Fair Value of Assets Acquired	$ 13
8.0% Senior Notes Due 2019 [Member]
Debt Instrument, Interest Rate, Stated Percentage		8.00%	8.00%
The 13.5% Senior Notes Due 2026 [Member]
Debt Instrument, Interest Rate, Stated Percentage			13.50%
The 5.0% Senior Notes due 2040 [Member]
Debt Instrument, Interest Rate, Stated Percentage			5.00%