Fair Value Measurements (Tables)

12 Months Ended

Dec. 31, 2017

Fair Value Disclosures [Abstract]

Financial Assets and Liabilities Measured at Fair Value on Nonrecurring Basis

	DECEMBER 31, 2017									DECEMBER 31, 2016
				Fair Value Measurements									Fair Value Measurements
				Derivativeasset			Derivative liability						Derivative asset			Derivative liability
				(Other current/			(Other current /						(Other current /			(Other current /
DERIVATIVES DESIGNATED AS	Nominal			non-current			non-current			Nominal			non-current			non-current
HEDGING INSTRUMENTS1)	volume			assets)			liabilities)			volume			assets)			liabilities)
Foreign exchange forward    contracts, less than 1 year    (cash flow hedge)	$	66.6			0.4			1.3		$	74.0		$	7.6		$	0.3
Foreign exchange forward    contracts, less than 2 years    (cash flow hedge)		—			—			—			10.8			0.0			0.2
TOTAL	$	66.6			0.4			1.3		$	84.8		$	7.6		$	0.5
DERIVATIVES NOT DESIGNATED AS
HEDGING INSTRUMENTS
Foreign exchange swaps, less    than 6 months		468.2	2)		2.4	3)		0.3	4)	$	251.8	5)	$	1.1	6)	$	0.1	7)
TOTAL	$	468.2		$	2.4		$	0.3		$	251.8		$	1.1		$	0.1

1) There is no netting since there are no offsetting contracts.

2) Net nominal amount after deducting for offsetting swaps under ISDA agreements is $468.2 million.

3) Net amount after deducting for offsetting swaps under ISDA agreements is $2.4 million.

4) Net amount after deducting for offsetting swaps under ISDA agreements is $0.3 million.

5) Net nominal amount after deducting for offsetting swaps under ISDA agreements is $226.5 million.

6) Net amount after deducting for offsetting swaps under ISDA agreements is $1.1 million.

7) Net amount after deducting for offsetting swaps under ISDA agreements is $0.0 million.

Fair Value of Debt

	DECEMBER 31, 2017		DECEMBER 31, 2017		DECEMBER 31, 2016		DECEMBER 31, 2016
LONG-TERM DEBT	CARRYING VALUE1)		FAIR VALUE		CARRYING VALUE1)		FAIR VALUE
U.S. Private placement	$	1,310.5	$	1,379.9	$	1,312.4	$	1,360.0
Other long-term debt		11.2		11.2		11.2		11.2
TOTAL	$	1,321.7	$	1,391.1	$	1,323.6	$	1,371.2
SHORT-TERM DEBT
Overdrafts and other short-term debt		19.5		19.5		39.7		39.7
Short-term portion of long-term debt		0.2		0.2		180.1		185.6
TOTAL	$	19.7	$	19.7	$	219.8	$	225.3

1) Debt as reported in balance sheet.