Long-Term Incentive Employee Compensation - Rollforward of Outstanding Restricted Stock (Parenthetical) (Detail) (Restricted Stock [Member], Exelis and Xylem [Member], USD $) In Millions, except Per Share data, unless otherwise specified	10 Months Ended
	Oct. 31, 2011
Restricted Stock [Member] | Exelis and Xylem [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares cancelled in connection with distribution	0.5
Weighted-average grant date fair value	$ 95.14