SELECTED QUARTERLY DATA (unaudited) (Parenthetical) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
Dec. 31, 2014	Dec. 31, 2014
Quarterly Financial Information Disclosure [Abstract]
Debt prepayment costs	$ 243.6	$ 210.9

The cash outflow for incremental, external costs directly pertaining to an early extinguishment of debt, including legal costs and prepayment penalties, and excluding interest and repayment of debt principal.

No definition available.

Name:	us-gaap_PaymentsOfDebtExtinguishmentCosts
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration