Taxes (Tables)

12 Months Ended

Jan. 31, 2016

Income Tax Disclosure [Abstract]

Schedule of income before income tax, domestic and foreign

The components of income from continuing operations before income taxes are as follows:

	Fiscal Years Ended January 31,
(Amounts in millions)	2016		2015		2014
U.S.	$	16,685	$	18,610	$	19,412
Non-U.S.	4,953		6,189		5,244
Total income from continuing operations before income taxes	$	21,638	$	24,799	$	24,656

Schedule of components of income tax expense (benefit)

A summary of the provision for income taxes is as follows:

	Fiscal Years Ended January 31,
(Amounts in millions)	2016			2015			2014
Current:
U.S. federal	$	5,562		$	6,165		$	6,377
U.S. state and local	622			810			719
International	1,400			1,529			1,523
Total current tax provision	7,584			8,504			8,619
Deferred:
U.S. federal	(704		)	(387		)	(72		)
U.S. state and local	(106		)	(55		)	37
International	(216		)	(77		)	(479		)
Total deferred tax expense (benefit)	(1,026		)	(519		)	(514		)
Total provision for income taxes	$	6,558		$	7,985		$	8,105

Schedule of effective income tax rate reconciliation

A reconciliation of the significant differences between the U.S. statutory tax rate and the effective income tax rate on pretax income from continuing operations is as follows:

	Fiscal Years Ended January 31,
	2016		2015		2014
U.S. statutory tax rate	35.0	%	35.0	%	35.0	%
U.S. state income taxes, net of federal income tax benefit	1.8	%	1.8	%	2.0	%
Income taxed outside the U.S.	(4.0	)%	(2.7	)%	(2.8	)%
Net impact of repatriated international earnings	0.1	%	(1.5	)%	(1.4	)%
Other, net	(2.6	)%	(0.4	)%	0.1	%
Effective income tax rate	30.3	%	32.2	%	32.9	%

Schedule of deferred tax assets and liabilities

The significant components of the Company's deferred tax account balances are as follows:

	January 31,
(Amounts in millions)	2016			2015
Deferred tax assets:
Loss and tax credit carryforwards	$	3,313		$	3,255
Accrued liabilities	3,763			3,395
Share-based compensation	192			184
Other	1,390			1,119
Total deferred tax assets	8,658			7,953
Valuation allowances	(1,456		)	(1,504		)
Deferred tax assets, net of valuation allowance	7,202			6,449
Deferred tax liabilities:
Property and equipment	5,813			5,972
Inventories	1,790			1,825
Other	1,452			1,618
Total deferred tax liabilities	9,055			9,415
Net deferred tax liabilities	$	1,853		$	2,966

Schedule of deferred taxes classification in consolidated balance sheets

The deferred taxes are classified as follows in the Company's Consolidated Balance Sheets:

	January 31,
(Amounts in millions)	2016		2015
Balance Sheet classification:
Assets:
Prepaid expenses and other	$	—	$	728
Other assets and deferred charges	1,504		1,033
Asset subtotals	1,504		1,761
Liabilities:
Accrued liabilities	—		56
Deferred income taxes and other	3,357		4,671
Liability subtotals	3,357		4,727
Net deferred tax liabilities	$	1,853	$	2,966

Summary of income tax contingencies

A reconciliation of unrecognized tax benefits from continuing operations was as follows:

	Fiscal Years Ended January 31,
(Amounts in millions)	2016			2015			2014
Unrecognized tax benefits, beginning of year	$	838		$	763		$	818
Increases related to prior year tax positions	164			7			41
Decreases related to prior year tax positions	(446		)	(17		)	(112		)
Increases related to current year tax positions	119			174			133
Settlements during the period	(25		)	(89		)	(117		)
Lapse in statutes of limitations	(43		)	—			—
Unrecognized tax benefits, end of year	$	607		$	838		$	763