Summary of Accounting Policies (Stock-Based Compensation Expense) (Details) (USD $) In Thousands	12 Months Ended
Mar. 31, 2011	Mar. 31, 2010	Mar. 31, 2009
Stock-based compensation, net of tax	$ 55,237	$ 56,474	$ 56,914
Cost of Sales [Member]
Stock-based compensation, net of tax	10,249	10,847	9,283
Selling, General and Administrative Expenses [Member]
Stock-based compensation, net of tax	$ 44,988	$ 45,627	$ 47,631

The aggregate amount of noncash, equity-based employee remuneration. This may include the value of stock options, amortization of restricted stock, and adjustment for officers compensation. As noncash, this element is an add back when calculating net cash generated by operating activities using the indirect method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Statement of Financial Accounting Standard (FAS)
-Number 95
-Paragraph 28

Name:	us-gaap_ShareBasedCompensation
Namespace Prefix:	us-gaap
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration