Fair Value Measurements (Carrying Value and Estimated Fair Value of Long-Term Debt) (Details) - USD ($) $ in Millions	May 04, 2019	Feb. 02, 2019	[1]	May 05, 2018
Fair Value Measurements [Abstract]
Long-term debt, Carrying value	$ 123	$ 124		$ 125
Long-term debt, Fair value	$ 136			$ 142

[1] The balance sheet at February 2, 2019 has been derived from the previously reported audited financial statements at that date, but does not include all of the information and footnotes required by U.S. generally accepted accounting principles for complete financial statements. For further information, refer to the consolidated financial statements and footnotes thereto included in Foot Locker, Inc.’s Annual Report on Form 10K for the year ended February 2, 2019.