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Long-term Debt and Borrowing Facilities (Revolving Facility And Letters Of Credit) (Narrative) (Details) - USD ($)
3 Months Ended 9 Months Ended
Oct. 31, 2020
Oct. 31, 2020
Nov. 02, 2019
Feb. 01, 2020
Revolving Credit Expiring August 2024 [Member]        
Outstanding Borrowings on Lines of Credit $ 0 $ 0    
Borrowings from Foreign Facilities   950,000,000    
Repayments of Lines of Credit   950,000,000 $ 0  
Foreign Facilities [Member]        
Repayments of Lines of Credit   91,000,000 21,000,000  
Letter of Credit [Member]        
Letters of Credit Outstanding, Amount 63,000,000 63,000,000    
Revolving Credit Facility [Member] | Revolving Credit Expiring August 2024 [Member]        
Revolving facility, borrowing capacity 1,000,000,000 1,000,000,000    
Line of Credit Financial Covenant, Consolidated Cash Balance 350,000,000 350,000,000    
Line of Credit Facility, Current Borrowing Capacity $ 1,453,000,000 1,453,000,000    
Revolving Facility Commitment fee percentage, unused capacity 0.30%      
Revolving Facility Current credit fees percentage rate, letters of credit 1.75%      
Revolving Facility Percentage spread over variable base rate 1.75%      
Revolving Facility Covenant Fixed charge coverage ratio 1.00      
Line of Credit Financial Covenant, Maximum Borrowing Amount $ 100,000,000      
Without Subsidiary Guarantee [Member] | Foreign Facilities with Parent Guarantee [Member]        
Outstanding Borrowings on Lines of Credit 0 0 65,000,000 $ 50,000,000
Borrowings from Foreign Facilities   13,000,000    
Repayments of Lines of Credit   63,000,000    
With Subsidiary Guarantee [Member] | Foreign Facilities with Parent Guarantee [Member]        
Revolving facility, borrowing capacity 128,000,000 128,000,000    
Outstanding Borrowings on Lines of Credit 98,000,000 98,000,000 $ 95,000,000 $ 103,000,000
Borrowings from Foreign Facilities   21,000,000    
Line of Credit, Current $ 11,000,000 11,000,000    
Repayments of Lines of Credit   $ 28,000,000