SUBSEQUENT EVENTS (Details) - USD ($) $ in Millions	Feb. 27, 2018	Feb. 28, 2017
Subsequent event
Subsequent Events
Stock repurchase program, authorized amount	$ 500.0
February 2018 Repurchase Plan | Subsequent event
Subsequent Events
Stock repurchase program, authorized amount	250.0
February 2017 Repurchase Plan
Subsequent Events
Stock repurchase program, authorized amount		$ 500.0
February 2017 Repurchase Plan | Subsequent event
Subsequent Events
Stock repurchase program, authorized remaining amount	$ 250.0