Long-Term Incentive Employee Compensation - Status of Stock Option and Restricted Stock Shares (Parenthetical) (Detail) (Exelis and Xylem [Member], USD $) In Millions, except Per Share data, unless otherwise specified	10 Months Ended
	Oct. 31, 2011
Schedule Of Stock Options [Line Items]
Outstanding weighted average post exercise price	$ 92.20
Qualified Stock Options [Member]
Schedule Of Stock Options [Line Items]
Converted or Cancelled to the employees of Exelis/Xylem shares	1.2