SUBSEQUENT EVENT (Details) - Subsequent Event - Designated - Cash flow hedges - Forward-starting interest rate swaps $ in Millions	May. 21, 2016 USD ($)
SUBSEQUENT EVENT
Notional amount	$ 1,700
Derivative contracts entered into during first quarter of 2016
SUBSEQUENT EVENT
Notional amount	$ 1,300

Detail information of subsequent event by type. User is expected to use existing line items from elsewhere in the taxonomy as the primary line items for this disclosure, which is further associated with dimension and member elements pertaining to a subsequent event.

No definition available.

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration