Fair Value Measurements (Details 2) - USD ($) $ in Millions	Feb. 03, 2017	Jan. 29, 2016
Financial Instruments
Long-term debt carrying value (excluding capitalized lease obligations)	$ 14,328	$ 12,080
Unsecured Notes [Member]
Financial Instruments
Long-term debt carrying value (excluding capitalized lease obligations)	14,321	12,073
Mortgage Notes [Member]
Financial Instruments
Long-term debt carrying value (excluding capitalized lease obligations)	7	7
Estimate of Fair Value [Member]
Financial Instruments
Long-term debt fair value (excluding capitalized lease obligations)	15,312	13,300
Estimate of Fair Value [Member] | Unsecured Notes [Member] | Fair Value (Level 1) [Member]
Financial Instruments
Long-term debt fair value (excluding capitalized lease obligations)	15,305	13,292
Estimate of Fair Value [Member] | Mortgage Notes [Member] | Fair Value (Level 2) [Member]
Financial Instruments
Long-term debt fair value (excluding capitalized lease obligations)	$ 7	$ 8