Business and Summary of Significant Accounting Policies Other Intangible Assets and Related Accumulated Amortization (Details) (USD $) In Millions, unless otherwise specified	Jan. 31, 2012		Jan. 31, 2011
Finite-Lived Intangible Assets [Line Items]
Purchased technologies, at cost	$ 378.7	[1]	$ 313.1	[1]
Customer relationships, trade names, patents, and user lists, at cost	215.3	[2]	179.1	[2]
Finite-Lived Intangible Assets, Gross	594.0		492.2
Less: Accumulated amortization	(445.2)		(373.4)
Other intangible assets, net	$ 148.8		$ 118.8

[1] Purchased technologies include $1.2 million and zero of in-process research and development technology as of January 31, 2012 and January 31, 2011, respectively. In-process research and development is an indefinite lived asset that is held and tested at least annually for impairment until such time that it becomes fully developed technology. Once development is completed, the technology is amortized to expense over an applicable useful life.

[2] Included as a net balance in “Other assets” in the Consolidated Balance Sheet. Customer relationships and trade names include the effects of foreign currency translation.