Restructuring, Asset Impairment Charges and Other Items - Restructuring, Asset Impairment Charges and Other Items net (Detail) (USD $) In Thousands, unless otherwise specified	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011		Dec. 31, 2010
Restructuring Expense And Other Items Net [Line Items]
Total restructuring expense	$ 22,992		$ 57,318
Total restructuring of operations and other items, net	49,091		23,719		9,201
Total restructuring of operations and other items, net - Discontinued operations			40,900		49,700
Employee Severance and Benefits [Member]
Restructuring Expense And Other Items Net [Line Items]
Total restructuring expense	8,145		26,754
Other exit costs [Member]
Restructuring Expense And Other Items Net [Line Items]
Total restructuring expense	4,541		22,261
Lease and Contract Terminations [Member]
Restructuring Expense And Other Items Net [Line Items]
Total restructuring expense	10,306		8,303
Segment, Discontinued Operations [Member]
Restructuring Expense And Other Items Net [Line Items]
Total restructuring of operations and other items, net - Discontinued operations			40,863		49,684
Segment, Discontinued Operations [Member] | Lease and Contract Terminations [Member]
Restructuring Expense And Other Items Net [Line Items]
Total restructuring expense			2,141		1,951
Segment, Discontinued Operations [Member] | Employee Severance and Benefits [Member]
Restructuring Expense And Other Items Net [Line Items]
Total restructuring expense			15,428		3,626
Segment, Discontinued Operations [Member] | Other exit costs [Member]
Restructuring Expense And Other Items Net [Line Items]
Total restructuring expense			23,294		44,107
Segment, Continuing Operations [Member]
Restructuring Expense And Other Items Net [Line Items]
Total restructuring expense	22,992		16,455		11,942
Other items, net	26,099	[1]	7,264	[2]	(2,741)	[3]
Total restructuring of operations and other items, net	49,091		23,719		9,201
Segment, Continuing Operations [Member] | Employee Severance and Benefits [Member]
Restructuring Expense And Other Items Net [Line Items]
Total restructuring expense	8,145		11,326		8,264
Segment, Continuing Operations [Member] | Other exit costs [Member]
Restructuring Expense And Other Items Net [Line Items]
Total restructuring expense	4,541	[4]	(1,033)	[5]
Segment, Continuing Operations [Member] | Lease and Contract Terminations [Member]
Restructuring Expense And Other Items Net [Line Items]
Total restructuring expense	$ 10,306	[6]	$ 6,162	[6]	$ 3,678	[6]

[1] Primarily consists of $9.3 million in litigation settlements, $8.4 million of SandForce acquisition-related costs, and $6.8 million of costs related to the transition service agreements associated with the sale of the external storage systems business.

[2] Primarily consists of $12.2 million of transition service agreement costs associated with the sale of the external storage systems business, a $4.5 million intellectual property write-off, $3.4 million of litigation settlements and a $2.2 million loss on the disposition of fixed assets, substantially offset by a $15.5 million reversal of a sales and use tax related liability.

[3] Primarily consists of a $4.4 million reversal of litigation accruals due to a favorable court ruling, offset in part by $1.6 million of depreciation for assets reclassified from held for sale to held and used.

[4] Consists of a $2.7 million loss on the sale of property in the U.S. and $1.8 million of other asset impairment and exit costs.

[5] Includes a $6.4 million gain on the sale of land in Gresham, Oregon, substantially offset by a $5.5 million write-off of intellectual property in connection with the restructuring actions.

[6] Includes lease obligation costs for facilities that the Company ceased to use, changes in estimates, changes in time value and on-going expenditures related to previously vacated facilities. The 2012 amount includes $6.2 million related to the Company's former headquarters.