Pension and Other Postemployment Benefits (Tables)

12 Months Ended

Dec. 31, 2017

Defined Benefit Pension Plans [Member]

Components of Net Periodic Benefit Expense

The components of net periodic benefit expense for the three years ended December 31, 2017 were (in millions):

	2017			2016			2015
Service cost	$	10.1		$	7.8		$	5.3
Interest cost	7.9			7.8			7.6
Expected return on plan assets	(3.6		)	(3.7		)	(4.0		)
Amortization of prior service cost	4.6			4.5			4.3
Amortization of actuarial losses	7.0			5.3			5.7
	$	26.0		$	21.7		$	18.9

Weighted Average Assumptions Used to Determine Net Periodic Benefit Expense

The weighted average assumptions used to determine net periodic benefit expense for the three years ended December 31, 2017 were:

	2017		2016		2015
Discount rate	3.5	%	3.7	%	3.5	%
Compensation increases	2.0	%	2.0	%	1.9	%
Expected return on plan assets	5.3	%	4.8	%	5.7	%

Benefit Obligation, Fair Value of Plan Assets and Funded Status of Defined Benefit Pension Plans

At December 31, 2017 and 2016, the benefit obligation, fair value of plan assets and funded status of our defined benefit pension plans were (in millions):

	2017			2016
Benefit Obligation:
January 1	$	251.1		$	234.8
Service cost	10.1			7.8
Interest cost	7.9			7.8
Amendments, curtailments and settlements	0.3			—
Actuarial losses	6.8			13.3
Benefits paid	(9.1		)	(9.4		)
Foreign currency translation	9.9			(3.2		)
December 31	$	277.0		$	251.1
Fair Value of Plan Assets:
January 1	$	68.6		$	68.9
Actual return on plan assets	6.3			4.9
Employer contributions	8.3			6.6
Benefits paid	(9.1		)	(9.4		)
Foreign currency translation and other	6.2			(2.4		)
December 31	$	80.3		$	68.6
Funded Status December 31	$	(196.7	)	$	(182.5	)

Amounts Recorded in Balance Sheet, as Classified

At December 31, 2017 and 2016, the funded status was classified as follows (in millions):

	2017			2016
Other assets	$	6.0		$	4.2
Other current liabilities	(5.1		)	(5.1		)
Long-term liabilities	(197.6		)	(181.6		)
	$	(196.7	)	$	(182.5	)

Plans with Benefit Obligations in Excess of Plan Assets

At December 31, 2017 and 2016, plans with benefit obligations in excess of plan assets were (in millions):

	2017		2016
Benefit obligation	$	253.8	$	241.3
Plan assets	51.1		54.6
	$	202.7	$	186.7

Weighted Average Assumptions Used to Determine Benefit Obligation

The weighted average assumptions used to determine the benefit obligation at December 31, 2017 and 2016, were:

	2017		2016
Discount rate	3.1	%	3.5	%
Compensation increases	2.0	%	2.0	%

Estimated Future Benefit Payments

At December 31, 2017, the estimated benefits expected to be paid over the next 10 years are (in millions):

2018	$	9.7
2019	10.8
2020	12.3
2021	16.1
2022	16.8
2023 - 2027	99.6

Fair Value of Plan Assets

The fair value of plan assets at December 31, 2017 and 2016 was (in millions):

2017	Level 1		Level 2		Level 3		Total
Cash	$	1.0					$	1.0
Mutual funds	41.5						41.5
Unit trusts	28.2						28.2
Insurance contracts					$	8.6	8.6
Other			$	1.0			1.0
	$	70.7	$	1.0	$	8.6	$	80.3

2016
Cash	$	1.6					$	1.6
Mutual funds	39.0						39.0
Unit trusts	23.5						23.5
Insurance contracts					$	4.3	4.3
Other			$	0.2			0.2
	$	64.1	$	0.2	$	4.3	$	68.6

Changes in Fair Value of Plan Assets Measured Using Level 3 Inputs

Changes in the fair value of plan assets measured using Level 3 inputs at December 31, 2017 and 2016 were (in millions):

	2017		2016
January 1	$	4.3	$	4.2
Actual return on assets	0.2		0.2
Purchases, sales and settlements, net	4.1		(0.1		)
December 31	$	8.6	$	4.3

Weighted Average Plan Asset Allocations

The weighted average asset allocations at December 31, 2017 and 2016 were:

	2017				2016
	Target Allocation		Actual Allocation		Actual Allocation
Cash	4	%	1	%	3	%
Mutual funds	48	%	52	%	57	%
Unit trusts	34	%	35	%	34	%
Insurance contracts	11	%	11	%	6	%
Other	3	%	1	%	—	%
	100	%	100	%	100	%

Postemployment Arrangements [Member]

Components of Net Periodic Benefit Expense

The components of net periodic benefit expense for the three years ended December 31, 2017 were (in millions):

	2017		2016		2015
Service cost	$	4.4	$	3.9	$	4.8
Interest cost	3.7		3.5		4.3
Amortization of prior service cost	3.5		3.1		3.2
Amortization of actuarial losses	1.0		1.1		1.6
	$	12.6	$	11.6	$	13.9

Weighted Average Assumptions Used to Determine Net Periodic Benefit Expense

The weighted average assumptions used to determine net periodic benefit expense for the three years ended December 31, 2017 were:

	2017		2016		2015
Discount rate	3.9	%	4.1	%	3.8	%
Compensation increases	3.5	%	3.5	%	3.5	%

Benefit Obligation

At December 31, 2017 and 2016, the benefit obligation was (in millions):

	2017			2016
January 1	$	120.3		$	115.9
Service cost	4.4			3.9
Interest cost	3.7			3.5
Amendments	—			5.6
Actuarial (gain) loss	8.1			0.6
Benefits paid	(8.8		)	(9.2		)
December 31	$	127.7		$	120.3

Amounts Recorded in Balance Sheet, as Classified

At December 31, 2017 and 2016, the liability was classified as follows (in millions):

	2017		2016
Other current liabilities	$	9.3	$	8.1
Long-term liabilities	118.4		112.2
	$	127.7	$	120.3

Weighted Average Assumptions Used to Determine Benefit Obligation

The weighted average assumptions used to determine the benefit obligation at December 31, 2017 and 2016 were:

	2017		2016
Discount rate	3.4	%	3.9	%
Compensation increases	3.5	%	3.5	%

Estimated Future Benefit Payments

At December 31, 2017, the estimated benefits expected to be paid over the next 10 years are (in millions):

2018	$	9.3
2019	7.4
2020	6.6
2021	6.1
2022	6.5
2023 - 2027	33.2