FINANCIAL INSTRUMENTS - Summary of Contractual Maturities of Cash Equivalents and Available-For-Sale Investments (Detail) (USD $) In Millions, unless otherwise specified	Sep. 30, 2014
Amortized Cost
Mature in less than one year, Amortized Cost	$ 565.8
Mature in one to five years, Amortized Cost	1,248.6
Mature in after five years, Amortized Cost	0
Total, Amortized Cost	1,814.4
Fair Value
Mature in less than one year, Fair Value	566.8
Mature in one to five years, Fair Value	1,248.4
Mature in after five years, Fair Value	0
Total, Fair Value	$ 1,815.2