Taxes (Tables)

12 Months Ended

Jan. 31, 2017

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)	2017		2016		2015
U.S.	$	15,680	$	16,685	$	18,610
Non-U.S.	4,817		4,953		6,189
Total income from continuing operations before income taxes	$	20,497	$	21,638	$	24,799

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)	2017			2016			2015
Current:
U.S. federal	$	3,454		$	5,562		$	6,165
U.S. state and local	495			622			810
International	1,510			1,400			1,529
Total current tax provision	5,459			7,584			8,504
Deferred:
U.S. federal	1,054			(704		)	(387		)
U.S. state and local	51			(106		)	(55		)
International	(360		)	(216		)	(77		)
Total deferred tax expense (benefit)	745			(1,026		)	(519		)
Total provision for income taxes	$	6,204		$	6,558		$	7,985

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,
	2017		2016		2015
U.S. statutory tax rate	35.0	%	35.0	%	35.0	%
U.S. state income taxes, net of federal income tax benefit	1.7	%	1.8	%	1.8	%
Income taxed outside the U.S.	(4.5	)%	(4.0	)%	(2.7	)%
Net impact of repatriated international earnings	(1.0	)%	0.1	%	(1.5	)%
Other, net	(0.9	)%	(2.6	)%	(0.4	)%
Effective income tax rate	30.3	%	30.3	%	32.2	%

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)	2017			2016
Deferred tax assets:
Loss and tax credit carryforwards	$	3,633		$	3,313
Accrued liabilities	3,437			3,763
Share-based compensation	309			192
Other	1,474			1,390
Total deferred tax assets	8,853			8,658
Valuation allowances	(1,494		)	(1,456		)
Deferred tax assets, net of valuation allowance	7,359			7,202
Deferred tax liabilities:
Property and equipment	6,435			5,813
Inventories	1,808			1,790
Other	1,884			1,452
Total deferred tax liabilities	10,127			9,055
Net deferred tax liabilities	$	2,768		$	1,853

Schedule of deferred taxes classification in consolidated balance sheets

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

	January 31,
(Amounts in millions)	2017		2016
Balance Sheet classification
Assets:
Other assets and deferred charges	$	1,565	$	1,504
Liabilities:
Deferred income taxes and other	4,333		3,357
Net deferred tax liabilities	$	2,768	$	1,853

Summary of income tax contingencies

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

	Fiscal Years Ended January 31,
(Amounts in millions)	2017			2016			2015
Unrecognized tax benefits, beginning of year	$	607		$	838		$	763
Increases related to prior year tax positions	388			164			7
Decreases related to prior year tax positions	(32		)	(446		)	(17		)
Increases related to current year tax positions	145			119			174
Settlements during the period	(46		)	(25		)	(89		)
Lapse in statutes of limitations	(12		)	(43		)	—
Unrecognized tax benefits, end of year	$	1,050		$	607		$	838