Summary Of Significant Accounting Policies (Details) - USD ($)	1 Months Ended	12 Months Ended
	Apr. 30, 2016	Apr. 30, 2016	Apr. 30, 2015	Apr. 30, 2014
Summary Of Significant Accounting Policies [Line Items]
Book overdrafts included in accounts payable	$ 43,100,000	$ 43,100,000	$ 34,000,000
Maximum funding by facility	$ 2,000,000,000	$ 2,000,000,000
Period at which loans are classified as non-accrual (in days)		90 days
Weighted-average life of intangible assets with finite lives (in years)		19 years
Contributions of continuing operations to 401(k) defined contribution plans		$ 14,300,000	14,800,000	$ 11,800,000
Expenses related to severance benefits		12,000,000	6,700,000	5,200,000
Foreign currency losses		$ 7,800,000	$ 5,900,000	$ 18,200,000
Document Fiscal Year Focus		2016
Buildings
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life		15 years
Computers and other equipment
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	3 years
Purchased software
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life		3 years
Leasehold improvements
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life		8 years
Minimum
Summary Of Significant Accounting Policies [Line Items]
Mortgage loan's past due, in days		60 days
Minimum | Software Development
Summary Of Significant Accounting Policies [Line Items]
Weighted-average life of intangible assets with finite lives (in years)		3 years
Maximum
Summary Of Significant Accounting Policies [Line Items]
Mortgage loan's past due, in days		180 days
Maximum | Software Development
Summary Of Significant Accounting Policies [Line Items]
Weighted-average life of intangible assets with finite lives (in years)		5 years
Maximum | Buildings
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life		40 years
Maximum | Computers and other equipment
Summary Of Significant Accounting Policies [Line Items]
Estimated useful life	5 years
Emerald Advance lines of credit
Summary Of Significant Accounting Policies [Line Items]
Maximum funding by facility	$ 1,000	$ 1,000