Fair Value Measurements and Concentrations of Credit Risk - Estimated Fair Value of Company Long Term Debt (Details) - USD ($) $ in Millions	Jan. 31, 2026	Feb. 01, 2025
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Abstract]
Notional amount	$ 2,441	$ 2,785
Carrying amount	2,432	2,779
Fair value	$ 2,307	$ 2,467

Long-Term Debt, Including Current Maturities, Fair Value

No definition available.

Name:	m_LongTermDebtIncludingCurrentMaturitiesFairValue
Namespace Prefix:	m_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant