Stock Activity (Detail) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Jan. 31, 2014	Jun. 06, 2013
Shares available for grant
Shares Available for Grant, Balance as of January 31, 2013	11,759,740	21,900,000
Shares Available for Grant, Options granted under all plans	(10,866,107)
Shares Available for Grant, Exercised	0
Shares Available for Grant, Cancelled	2,312,522
Shares Available for Grant, Balance as of January 31, 2014	55,852,536	21,900,000
Outstanding Stock Options
Outstanding Stock Options, Balance as of January 31, 2013	29,983,292
Outstanding Stock Options	10,866,107
Outstanding Stock Options, Exercised	(9,932,832)
Outstanding Stock Options, Cancelled	(2,312,522)
Outstanding Stock Options, Balance as of January 31, 2014	28,604,045
Outstanding Stock Options, Vested or expected to vest	27,258,499
Outstanding Stock Options, Exercisable as of January 31, 2014	10,921,637
Options Outstanding Weighted-Average Exercise Price
Weighted- Average Exercise Price, Balance as of January 31, 2013	$ 26.60
Weighted- Average Exercise Price, Options	$ 41.08
Weighted- Average Exercise Price, Exercised	$ 19.25
Weighted- Average Exercise Price, Cancelled	$ 31.37
Weighted- Average Exercise Price, Balance as of January 31, 2013	$ 34.26
Weighted- Average Exercise Price, Vested or expected to vest	$ 33.81
Weighted- Average Exercise Price, Exercisable as of January 31, 2014	$ 26.45
Aggregate Intrinsic Value
Weighted- Average Exercise Price, Balance as of January 31, 2014	$ 751,314
Weighted- Average Exercise Price, Vested or expected to vest	728,393
Weighted- Average Exercise Price, Exercisable as of January 31, 2014	$ 372,249
Restricted Stock Activity
Shares available for grant
Shares Available for Grant, Restricted stock activity	(14,792,960)
Outstanding Stock Options
Outstanding Stock Options
Options Outstanding Weighted-Average Exercise Price
Weighted- Average Exercise Price, Options
Stock Grants To Board And Advisory Board Members
Shares available for grant
Shares Available for Grant, Stock grants to board and advisory board members	(210,320)
Outstanding Stock Options
Outstanding Stock Options
Options Outstanding Weighted-Average Exercise Price
Weighted- Average Exercise Price, Options
2004 Equity Incentive Plan
Shares available for grant
Shares Available for Grant, Increase in shares authorized: 2004 Equity Incentive Plan	14,000,000
Outstanding Stock Options
Outstanding Stock Options	0
Options Outstanding Weighted-Average Exercise Price
Weighted- Average Exercise Price, Options	$ 0.00
2013 Equity Incentive Plan
Shares available for grant
Shares Available for Grant, Increase in shares authorized	76,443,240
Shares Available for Grant, Balance as of January 31, 2014	55,626,162
Outstanding Stock Options
Outstanding Stock Options	0
Options Outstanding Weighted-Average Exercise Price
Weighted- Average Exercise Price, Options	$ 0.00
2010 EdgeSpring Plan
Shares available for grant
Shares Available for Grant, Increase in shares authorized	124,859
Outstanding Stock Options
Outstanding Stock Options	0
Options Outstanding Weighted-Average Exercise Price
Weighted- Average Exercise Price, Options	$ 0.00
2004 ExactTarget Plan
Shares available for grant
Shares Available for Grant, Increase in shares authorized	136,986
Outstanding Stock Options
Outstanding Stock Options	0
Options Outstanding Weighted-Average Exercise Price
Weighted- Average Exercise Price, Options	$ 0.00
2008 ExactTarget Plan
Shares available for grant
Shares Available for Grant, Increase in shares authorized	3,202,185
Outstanding Stock Options
Outstanding Stock Options	0
Options Outstanding Weighted-Average Exercise Price
Weighted- Average Exercise Price, Options	$ 0.00
1999 Plan
Shares available for grant
Shares Available for Grant, Plan shares expired	(26,257,609)
Outstanding Stock Options
Outstanding Stock Options	0
Options Outstanding Weighted-Average Exercise Price
Weighted- Average Exercise Price, Options	$ 0.00