CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME/(LOSS) Consolidated Statements of Comprehensive Income/(loss) Parenthetical
$ in Millions
3 Months Ended
Apr. 30, 2016
USD ($)
pension [Member]  
Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), before Tax $ 2
Selling, General and Administrative Expenses [Member]  
Other Comprehensive (Income) Loss, Amortization Adjustment from AOCI, Pension and Other Postretirement Benefit Plans, for Net Prior Service Cost (Credit), before Tax $ (2)