Debt (Other Facilities) (Narrative) (Details) (USD $)	1 Months Ended
	Oct. 31, 2012	Apr. 30, 2014	Jan. 31, 2014
Debt Instrument [Line Items]
Line of Credit Facility, Expiration Date		2016
Line of credit, outstanding amount		$ 49,300,000
U.S. trade receivables		3,061,180,000	3,215,729,000
Standby letters of credit issued		85,500,000
Credit Agreement
Debt Instrument [Line Items]
Maximum borrowing capacity		500,000,000.0
Possible future increase of maximum borrowing capacity		750,000,000.0
Line of credit, outstanding amount		0	0
Receivables Securitization Program
Debt Instrument [Line Items]
Maximum borrowing capacity		400,000,000.0
Line of credit, outstanding amount		0	0
U.S. trade receivables		682,800,000	623,000,000
Renewal Period	2 years
Other Committed And Uncommitted Revolving Credit Facilities, Expiring On Various Dates Through Fiscal 2017
Debt Instrument [Line Items]
Maximum borrowing capacity		441,700,000
Line of credit, outstanding amount		49,300,000	42,900,000
Weighted average interest rate		5.33%	6.15%
Other committed and uncommitted lines of credit and overdraft facilities		$ 893,100,000