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Stock And Stock-Based Incentive Plans (Narrative) (Details) (USD $) In Millions, except Share data, unless otherwise specified	6 Months Ended	3 Months Ended		6 Months Ended			6 Months Ended									6 Months Ended					6 Months Ended
	Aug. 31, 2014 FY 2015 Share Repurchase Authorization Member	Aug. 31, 2014 Share Repurchase Program [Member]	Aug. 31, 2013 Share Repurchase Program [Member]	Aug. 31, 2014 Share Repurchase Program [Member]	Aug. 31, 2013 Share Repurchase Program [Member]	Aug. 31, 2014 Share Repurchase Program [Member] FY 2013 Share Repurchase Authorizations Member	Aug. 31, 2014 Stock Compensation Plan [Member]	Aug. 31, 2013 Stock Compensation Plan [Member]	Aug. 31, 2014 Stock Option [Member]	Aug. 31, 2013 Stock Option [Member]	Aug. 31, 2014 Stock Option [Member] Minimum [Member]	Aug. 31, 2014 Stock Option [Member] Maximum [Member]	Aug. 31, 2014 Cash-Settled Restricted Stock Units [Member]	Aug. 31, 2013 Cash-Settled Restricted Stock Units [Member]	Feb. 28, 2014 Cash-Settled Restricted Stock Units [Member]	Aug. 31, 2014 Cash-Settled Restricted Stock Units [Member] Minimum [Member]	Aug. 31, 2014 Cash-Settled Restricted Stock Units [Member] Maximum [Member]	Aug. 31, 2014 Stock-Settled Restricted Stock Units [Member]	Aug. 31, 2013 Stock-Settled Restricted Stock Units [Member]	Feb. 28, 2014 Stock-Settled Restricted Stock Units [Member]	Aug. 31, 2014 Stock-Settled Restricted Stock Units [Member] Minimum [Member]	Aug. 31, 2014 Stock-Settled Restricted Stock Units [Member] Maximum [Member]	Aug. 31, 2014 Restricted Stock Awards [Member]	Aug. 31, 2013 Restricted Stock Awards [Member]
Stock and Stock-Based Incentive Plans
Share repurchase, authorized amount	$ 1,000					$ 800
Share repurchase, authorization expiration	Dec. 31, 2015
Shares repurchased during the period		4,024,801	1,046,629	7,866,740	3,992,251
Share repurchase, average purchase price per share		$ 49.92	$ 46.54	$ 47.68	$ 43.40
Share repurchase, amount remaining for repurchase		907.0		907.0
Incentive stock option grants in period							0
Vesting period, in years											1 year	4 years	3 years					3 years					1 year 0 months 0 days
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
Restricted stock awards granted, number of shares													587,511	541,819				245,190	236,675				22,860
Restricted stock granted, weighted average grant date fair value													$ 44.96	$ 42.68				$ 55.37	$ 51.98				$ 51.18
Options granted, Number of Shares									2,003,238	1,601,699
Capitalized share-based compensation							0	0
Cash received as a result of stock option exercises									44.3	20.8
Total intrinsic value of options exercised									85.9	29.5
Related tax benefits									34.6	11.8			8.6	9.2				7.4	6.7
Options granted, weighted average grant date fair value									$ 13.21	$ 15.59
Unrecognized compensation costs related to nonvested options/MSU/RSA									43.7									19.0					0.2
Weighted average period, years									2 years 7 months 6 days									1 year 4 months 24 days					0 years 9 months 18 days
Payment related to restricted stock units vested during the period													$ 21.2	$ 23.0
Awards outstanding													1,591,000		1,531,000			808,000		852,000				0

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