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Regional Segment Revenue and Gross Margin for Company (Detail) (USD $)
In Millions, unless otherwise specified
3 Months Ended 12 Months Ended
Dec. 31, 2012
Sep. 30, 2012
Jun. 30, 2012
Mar. 31, 2012
Dec. 31, 2011
Sep. 30, 2011
Jun. 30, 2011
Mar. 31, 2011
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Segment Reporting Information                      
Revenue $ 740 $ 647 $ 665 $ 613 $ 673 $ 602 $ 581 $ 506 $ 2,665 $ 2,362 $ 1,936
Gross margin 410 361 382 338 374 328 316 275 1,491 1,293 1,088
Selling, general and administrative expenses                 728 663 526
Research and development expenses                 183 174 147
Total income from operations 150 143 160 127 133 122 110 91 580 456 415
Other (expense) income, net                 (2) 25 (1)
Income before income taxes                 578 481 414
Americas
                     
Segment Reporting Information                      
Revenue                 1,619 [1] 1,436 [1] 1,166 [1]
Gross margin                 967 837 702
EMEA
                     
Segment Reporting Information                      
Revenue                 636 548 442
Gross margin                 331 281 232
APJ
                     
Segment Reporting Information                      
Revenue                 410 378 328
Gross margin                 193 175 154
Selling, General and Administrative Expenses
                     
Segment Reporting Information                      
Selling, general and administrative expenses                 728 663 526
Research And Development Expenses
                     
Segment Reporting Information                      
Research and development expenses                 $ 183 $ 174 $ 147
[1] The Americas region includes revenue from the United States of $1,478 million in 2012, $1,315 million in 2011 and $1,059 million in 2010.