MERGERS (Details) (USD $) In Millions, except Per Share data, unless otherwise specified	12 Months Ended		0 Months Ended
	Jan. 31, 2015	Feb. 01, 2014	Aug. 18, 2014	Jan. 28, 2014	Feb. 02, 2013
Additional disclosures
Goodwill	$ 2,304	$ 2,135			$ 1,234
Pro forma results of operations
Sales	108,687	103,584
Net earnings including noncontrolling interests	1,736	1,624
Net earnings attributable to noncontrolling interests	19	12
Net earnings attributable to The Kroger Co.	1,717	1,612
Vitacost.com, Inc.
MERGERS
Percentage of outstanding common stock acquired			100.00%
Price per share of outstanding common stock acquired			$ 8.00
Purchase price of outstanding common stock acquired			287
ASSETS
Total current assets			79
Property, plant and equipment			28
Intangibles			81
Total Assets, excluding Goodwill			188
LIABILITIES
Total current liabilities			(54)
Deferred income taxes			(7)
Total Liabilities			(61)
Additional disclosures
Total Identifiable Net Assets			127
Goodwill			160
Total Purchase Price			287
Vitacost.com, Inc. | Customer relationships
Additional disclosures
Definite-lived intangibles			49
Weighted-average amortizable lives			5 years
Vitacost.com, Inc. | Technology
Additional disclosures
Definite-lived intangibles			26
Weighted-average amortizable lives			10 years
Vitacost.com, Inc. | Trade name
Additional disclosures
Definite-lived intangibles			6
Weighted-average amortizable lives			3 years
Harris Teeter
MERGERS
Percentage of outstanding common stock acquired				100.00%
Purchase price of outstanding common stock acquired				2,436
Decrease in LIFO reserve	52
Purchase price allocation, increase (decrease) to goodwill	9
Purchase price allocation, increase (decrease) to accrued salaries and wages	13
Purchase price allocation, increase (decrease) to current deferred income tax liabilities	4
Purchase price allocation, increase (decrease) to other current liabilities	5
Purchase price allocation, increase (decrease) to long-term deferred income tax liabilities	5
ASSETS
Cash and temporary cash investments				92
Store deposits in-transit				28
Receivables				41
FIFO inventory				426
Prepaid and other current assets				31
Total current assets				618
Property, plant and equipment				1,328
Intangibles				558
Other assets				238
Total Assets, excluding Goodwill				2,742
LIABILITIES
Current portion of long-term debt including obligations under capital leases and financing obligations				(7)
Trade accounts payable				(202)
Accrued salaries and wages				(60)
Deferred income taxes				(16)
Other current liabilities				(164)
Total current liabilities				(449)
Fair-value of long-term debt including obligations under capital leases and financing obligations				(252)
Deferred income taxes				(280)
Pension and postretirement benefit obligations				(98)
Other long-term liabilities				(137)
Total Liabilities				(1,216)
Additional disclosures
Total Identifiable Net Assets				1,526
Goodwill				910
Total Purchase Price				2,436
Harris Teeter | Pharmacy prescription files
Additional disclosures
Definite-lived intangibles				53
Weighted-average amortizable lives				7 years
Harris Teeter | Favorable leasehold interests
Additional disclosures
Definite-lived intangibles				75
Weighted-average amortizable lives				24 years
Harris Teeter | Trade name
Additional disclosures
Indefinite intangibles				$ 430