Stock And Stock-Based Incentive Plans (Narrative) (Details) (USD $)	12 Months Ended				12 Months Ended																										12 Months Ended
	Feb. 28, 2014 FY 2013 Share Repurchase Authorizations Member	Feb. 28, 2014 FY 2015 Share Repurchase Authorization Member	Feb. 28, 2014 Preferred Stock [Member]	Feb. 28, 2014 Preferred Stock [Member] Preferred Series A [Member]	Feb. 28, 2014 Share Repurchase Program [Member] FY 2013 Share Repurchase Authorizations Member	Feb. 28, 2013 Share Repurchase Program [Member] FY 2013 Share Repurchase Authorizations Member	Feb. 28, 2014 Share Repurchase Program [Member] October 2012 Authorization [Member]	Feb. 28, 2014 Share Repurchase Program [Member] January 2013 Authorization [Member]	Feb. 28, 2014 Stock Compensation Plan [Member]	Feb. 28, 2013 Stock Compensation Plan [Member]	Feb. 29, 2012 Stock Compensation Plan [Member]	Feb. 28, 2014 Stock Option [Member]	Feb. 28, 2013 Stock Option [Member]	Feb. 29, 2012 Stock Option [Member]	Feb. 28, 2014 Stock Option [Member] Minimum [Member]	Feb. 28, 2014 Stock Option [Member] Maximum [Member]	Feb. 28, 2014 Cash-Settled Restricted Stock Units [Member]	Feb. 28, 2013 Cash-Settled Restricted Stock Units [Member]	Feb. 29, 2012 Cash-Settled Restricted Stock Units [Member]	Feb. 28, 2014 Cash-Settled Restricted Stock Units [Member] Minimum [Member]	Feb. 28, 2014 Cash-Settled Restricted Stock Units [Member] Maximum [Member]	Feb. 28, 2014 Stock-Settled Restricted Stock Units [Member]	Feb. 28, 2013 Stock-Settled Restricted Stock Units [Member]	Feb. 29, 2012 Stock-Settled Restricted Stock Units [Member]	Feb. 28, 2014 Stock-Settled Restricted Stock Units [Member] Minimum [Member]	Feb. 28, 2014 Stock-Settled Restricted Stock Units [Member] Maximum [Member]	Feb. 28, 2013 Restricted Stock [Member]	Feb. 29, 2012 Restricted Stock [Member]	Feb. 28, 2011 Restricted Stock [Member]	Feb. 28, 2014 Restricted Stock [Member]	Feb. 28, 2014 Restricted Stock [Member] Minimum [Member]	Feb. 28, 2014 Employee Stock Purchase Plan [Member]	Feb. 28, 2013 Employee Stock Purchase Plan [Member]	Feb. 29, 2012 Employee Stock Purchase Plan [Member]	Feb. 28, 2014 Employee Stock Purchase Plan [Member] Maximum [Member]
Stock and Stock-Based Incentive Plans
Share repurchase, authorized amount	$ 800,000,000	$ 1,000,000,000			$ 800,000,000		$ 300,000,000	$ 500,000,000
Share repurchase, authorization expiration		Dec. 31, 2015					Dec. 31, 2013	Dec. 31, 2014
Shares repurchased during the period					6,859,518	5,762,000
Share repurchase, average purchase price per share					$ 44.61	$ 36.77
Share repurchase, amount remaining for repurchase					282,100,000
Common stock, shares authorized									50,200,000																							8,000,000
Vesting period, in years															1 year	4 years	3 years					3 years									3 years
Years until expiration																10 years
Cash payment per RSU, percentage																				75.00%	200.00%
MSUs converted to common stock																									0	2
Conversion ratio, number of final trading days in vesting period																						40 days
Stock units granted, number of units or shares																	541,819	644,232	575,380			237,660	348,551	299,102			0	0	0
Tax benefit related to the vesting of options																											10,900,000
Stock units granted, weighted average grant date fair value																	$ 42.68	$ 31.76	$ 32.69			$ 52.02	$ 40.33	$ 45.48
Options granted, Number of Shares												1,605,149	2,252,124	1,993,498
Capitalized share-based compensation									0	0	0
Cash received as a result of stock option exercises												45,100,000	71,700,000	25,300,000
Total intrinsic value of options exercised												62,500,000	68,000,000	23,900,000
Related tax benefits												25,100,000	27,200,000	9,500,000			9,300,000					7,900,000
Options granted, weighted average grant date fair value												$ 15.59	$ 12.67	$ 13.80
Unrecognized compensation costs related to nonvested options/MSUs												32,600,000										13,400,000
Weighted average period, years												2 years										1 year
Payment related to restricted stock units vested during the period																	23,300,000
Preferred shares authorized				300,000
Preferred Stock, Shares Outstanding			0
Common shares reserved for future grants									10,637,303
Awards outstanding																	1,531,000	1,651,000				852,000	904,000							0
Associate contribution limit																																10.00%
Associate contribution limit, value																																			$ 7,500
Company match																																$ 0.15
Shares remained available under the purchase plan																																3,724,673
Shares purchased on the open market																																188,797	251,667	260,927
Average price per share under purchases plan																																$ 47.35	$ 32.05	$ 30.02