DERIVATIVES, Disclosures and derivative instrument aggregated notional amounts by currency and designations (Details) $ in Millions	Jul. 31, 2016 USD ($)
Sell | Forward Contracts DKK | Derivatives Not Designated as Hedging Instruments
Derivative
Total notional amount	$ 42
Sell | Cash Flow Hedging | Forward Contracts USD
Derivative
Total notional amount	183
Sell | Euro | Forward Contracts DKK | Derivatives Not Designated as Hedging Instruments
Derivative
Total notional amount	64
Sell | Euro | Cash Flow Hedging | Forward Contracts USD
Derivative
Total notional amount	46
Sell | British Pound | Forward Contracts USD | Derivatives Not Designated as Hedging Instruments
Derivative
Total notional amount	0
Sell | British Pound | Forward Contracts DKK | Derivatives Not Designated as Hedging Instruments
Derivative
Total notional amount	4
Sell | British Pound | Cash Flow Hedging | Forward Contracts USD
Derivative
Total notional amount	34
Sell | Canadian Dollar | Forward Contracts USD | Derivatives Not Designated as Hedging Instruments
Derivative
Total notional amount	0
Sell | Canadian Dollar | Forward Contracts DKK | Derivatives Not Designated as Hedging Instruments
Derivative
Total notional amount	2
Sell | Canadian Dollar | Cash Flow Hedging | Forward Contracts USD
Derivative
Total notional amount	26
Sell | Australian Dollars | Forward Contracts DKK | Derivatives Not Designated as Hedging Instruments
Derivative
Total notional amount	4
Sell | Malaysian Ringgit | Forward Contracts USD | Derivatives Not Designated as Hedging Instruments
Derivative
Total notional amount	2
Sell | Japanese Yen | Forward Contracts DKK | Derivatives Not Designated as Hedging Instruments
Derivative
Total notional amount	3
Sell | Japanese Yen | Cash Flow Hedging | Forward Contracts USD
Derivative
Total notional amount	75
Sell | Other | Forward Contracts DKK | Derivatives Not Designated as Hedging Instruments
Derivative
Total notional amount	15
Sell | Other | Cash Flow Hedging | Forward Contracts USD
Derivative
Total notional amount	6
Buy | Forward Contracts USD | Derivatives Not Designated as Hedging Instruments
Derivative
Total notional amount	167
Buy | Euro | Forward Contracts USD | Derivatives Not Designated as Hedging Instruments
Derivative
Total notional amount	105
Buy | Australian Dollars | Forward Contracts USD | Derivatives Not Designated as Hedging Instruments
Derivative
Total notional amount	12
Buy | Australian Dollars | Cash Flow Hedging | Forward Contracts USD
Derivative
Total notional amount	4
Buy | Japanese Yen | Forward Contracts USD | Derivatives Not Designated as Hedging Instruments
Derivative
Total notional amount	21
Buy | United States of America, Dollars | Forward Contracts DKK | Derivatives Not Designated as Hedging Instruments
Derivative
Total notional amount	50
Buy | Other | Forward Contracts USD | Derivatives Not Designated as Hedging Instruments
Derivative
Total notional amount	$ 31