Stock Based Compensation (Tables)

12 Months Ended

Jan. 31, 2015

Nonvested Restricted Stock Shares Activity [Table Text Block]

Activity related to restricted stock awards for 2014 is as follows:

	Shares		Weighted Average Grant Date Fair Value
	(thousands)
Nonvested, beginning of period	79.2		$	22.58
Granted	—		—
Forfeited	(0.6	)	23.43
Vested	(52.7	)	22.16
Nonvested, end of period	25.9		$	23.43

Components of Stock Based Compensation Expense

Stock-based compensation expense included the following components:

	2014		2013		2012
	(millions)
Stock options	$	47	$	36	$	28
Restricted stock units	26		25		26
Restricted stock	—		1		1
Stock credits	—		—		6
	$	73	$	62	$	61

Weighted Average Assumption Used To Estimate Fair Value of Stock Options

The fair value of stock options granted during 2014, 2013 and 2012 and the weighted average assumptions used to estimate the fair value are as follows:

	2014			2013			2012
Weighted average grant date fair value of stock options granted during the period	$	19.07		$	12.15		$	12.22
Dividend yield	2.5		%	2.8		%	2.2		%
Expected volatility	42.7		%	41.3		%	39.8		%
Risk-free interest rate	1.5		%	0.8		%	1.2		%
Expected life	5.7 years			5.7 years			5.7 years

Schedule of Stock Option Activity

Activity related to stock options for 2014 is as follows:

	Shares		Weighted Average Exercise Price		Weighted Average Remaining Contractual Life	Aggregate Intrinsic Value
	(thousands)				(years)	(millions)
Outstanding, beginning of period	23,313.6		$	32.02
Granted	3,296.0		$	58.92
Canceled or forfeited	(468.4	)	$	41.10
Exercised	(6,462.4	)	$	30.98
Outstanding, end of period	19,678.8		$	36.65
Exercisable, end of period	11,405.5		$	30.06	4.0	$	386
Options expected to vest	7,280.5		$	45.73	8.1	$	132

Additional Information Relating to Stock Options

Additional information relating to stock options is as follows:

	2014		2013		2012
	(millions)
Intrinsic value of options exercised	$	189	$	207	$	132
Grant date fair value of stock options that vested during the year	38		31		30
Cash received from stock options exercised	200		254		164
Excess tax benefits realized from exercised stock options	43		51		36

Schedule of Nonvested Restricted Stock Units Activity [Table Text Block]

Activity related to restricted stock units for 2014 is as follows:

	Shares		Weighted Average Grant Date Fair Value
	(thousands)
Nonvested, beginning of period	1,191.8		$	41.16
Granted – performance-based	289.3		59.81
Performance adjustment	46.9		40.63
Granted – time-based	202.3		58.83
Dividend equivalents	21.0		59.52
Forfeited	(37.1	)	42.12
Vested	(421.3	)	40.40
Nonvested, end of period	1,292.9		$	48.47

Restricted Stock Units [Member]

Activity Related to Restricted Stock and Restricted Stock Units

Restricted Stock and Restricted Stock Units

The weighted average grant date fair values of restricted stock units granted during 2014, 2013 and 2012 are as follows:

	2014		2013		2012
Restricted stock units	$	59.41	$	42.54	$	39.52