The amount of outstanding funds that the entity is obligated to repay.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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- Definition

The interest rate on borrowings. [Refer: Borrowings]

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Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
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Line items represent concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes of the table.

+ References

No definition available.

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- Definition

The cash inflow from borrowings obtained. [Refer: Borrowings]

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- Definition

The cash outflow to settle borrowings, classified as financing activities. [Refer: Borrowings]

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Reference 1: http://www.xbrl.org/2003/role/exampleRef
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- Definition

Period extended of the term of a loan in which it must be paid, in PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

No definition available.

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- Definition

The Maximum borrowing capacity under the credit facility without consideration of any current restrictions on the amount that could be borrowed or the amounts currently outstanding under the facility.

+ References

No definition available.

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The fee, expressed as a percentage of the line of credit facility, for available but unused credit capacity under the credit facility.

+ References

No definition available.

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LONG-TERM DEBT AND CREDIT FACILITIES - Corporate revolving credit and term loan facilities (Details) - USD ($) $ in Millions					12 Months Ended
	Jul. 28, 2017	Jul. 12, 2017	Mar. 04, 2016	Jan. 04, 2016	Dec. 31, 2017	Dec. 31, 2016
Long-term debt
Letters of credit and surety bonds					$ 1,732.6	$ 1,733.2
Debt facility utilized thoughout the year					494.7	175.0
Repayment of debt					$ 500.0	425.0
Standby fee applicable to unused availability					0.40%
Revolving credit facility
Long-term debt
Maximum borrowing	$ 1,500.0
Extended maturity term	1 year
Debt facility utilized thoughout the year				$ 175.0	$ 21.0	$ 104.5
Repayment of debt		$ 500.0	$ 175.0
Revolving credit facility \| LIBOR Plus
Long-term debt
Interest Rates (as a percent)					2.00%
Letter of credit \| Minimum
Long-term debt
Interest Rates (as a percent)					1.33%
Letter of credit \| Maximum
Long-term debt
Interest Rates (as a percent)					2.00%