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Employee Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2017
Retirement Benefits [Abstract]  
Schedule of combined funded status of the pension plans and their reconciliation with the related amounts recognized in balance sheet
The following table sets forth the combined funded status of the Pension Plans and their reconciliation to the related amounts recognized in our Consolidated Financial Statements at our December 31, 2017 and 2016 measurement dates:
 
 
December 31,
 
 
2017
 
2016
Change in benefit obligation:
 
 
 
 
Benefit obligation at beginning of year
 
$
121.0

 
$
115.1

Service cost
 
2.4

 
2.2

Interest cost
 
4.2

 
4.1

Participant contributions
 
1.0

 
0.9

Curtailments
 
—

 
0.2

Actuarial loss
 
1.2

 
17.2

Benefits paid
 
(6.0
)
 
(3.0
)
Settlement payments
 
—

 
(3.8
)
Other, principally foreign exchange
 
10.0

 
(11.9
)
Benefit obligation at end of year
 
$
133.8

 
$
121.0

Change in plan assets:
 
 
 
 
Fair value of plan assets at beginning of year
 
$
99.3

 
$
104.5

Actual gain on plan assets
 
10.4

 
4.8

Employer contributions
 
3.1

 
2.8

Participant contributions
 
1.0

 
0.9

Benefits paid
 
(6.0
)
 
(3.0
)
Other, principally foreign exchange
 
7.7

 
(10.7
)
Fair value of assets at end of year
 
$
115.5

 
$
99.3

Amounts recognized in the consolidated balance sheets:
 
 
 
 
Funded status (current)
 
$
—

 
$
—

Funded status (non-current)
 
(18.3
)
 
(21.6
)
Accumulated other comprehensive loss:
 
 
 
 
Unrecognized actuarial loss
 
20.6

 
28.3

Unrecognized prior service cost
 
0.5

 
(3.7
)
Deferred taxes
 
(4.7
)
 
(4.9
)
Net amount recognized
 
$
(1.9
)
 
$
(1.9
)
Schedule of components of net periodic pension cost
The following table presents the components of our net periodic pension benefit cost:
 
 
Year Ended December 31,
 
 
2017
 
2016
 
2015
Components of net periodic pension benefit cost:
 
 
 
 
 
 
Service cost
 
$
2.4

 
$
2.2

 
$
2.5

Interest cost
 
4.2

 
4.1

 
4.3

Expected return on plan assets
 
(5.9
)
 
(5.8
)
 
(5.9
)
Amortization of actuarial losses
 
1.4

 
0.3

 
1.1

Net periodic cost
 
$
2.1

 
$
0.8

 
$
2.0
Schedule of amounts included in accumulated other comprehensive loss expected to be recognized as components of net periodic pension cost during the next fiscal year
The amounts included in accumulated other comprehensive loss as of December 31, 2017 expected to be recognized as components of net periodic pension benefit cost during the fiscal year ending December 31, 2018 are presented below:
 
 
 
Unrecognized loss
 
$
1.6

Unrecognized prior service cost
 
(0.5
)
Net amount expected to be recognized
 
$
1.1
Schedule of fair value of defined benefit pension plan assets by asset category
The fair value of the plan assets for both of the Pension Plans at December 31, 2016 by asset category is presented below:
Asset Category
 
Market
Value at
12/31/2016
 
Quoted
Prices in
Active
Markets for
Identical
Assets (Level 1)
 
Significant
Observable
Inputs (Level 2)
 
Significant
Unobservable
Inputs (Level 3)
Equity securities (a)
 
$
50.1

 
$
26.2

 
$
23.9

 
$
—

Global return fund (a)
 
15.7

 
—

 
15.7

 
—

Corporate bonds (a)
 
11.4

 
—

 
11.4

 
—

Government bonds
 
9.0

 
—

 
9.0

 
—

Real estate
 
10.9

 
—

 
—

 
10.9

Cash and short-term investments (b)(c)
 
2.2

 
2.2

 
—

 
—

Total pension assets
 
$
99.3

 
$
28.4

 
$
60.0

 
$
10.9


(a)
The assets are invested through managed funds that are valued using inputs derived principally from quoted prices in active markets for the underlying assets in the fund.
(b)
Other short-term investments are investments in pooled money market funds that are valued using inputs derived principally from the quoted prices in active markets for the underlying assets in the pool.
(c)
The carrying value of cash and cash equivalents approximates fair value because of the short-term maturity of these instruments.
The fair value of the plan assets for the Pension Plans at December 31, 2017 by asset category is presented below:
Asset Category
 
Market
Value at
12/31/2017
 
Quoted
Prices in
Active
Markets for
Identical
Assets (Level 1)
 
Significant
Observable
Inputs (Level 2)
 
Significant
Unobservable
Inputs (Level 3)
Equity securities (a)
 
$
56.1

 
$
31.4

 
$
24.7

 
$
—

Global return fund (a)
 
14.6

 
—

 
14.6

 
—

Corporate bonds (a)
 
13.9

 
—

 
13.9

 
—

Government bonds
 
10.6

 
—

 
10.6

 
—

Real estate
 
4.2

 
—

 
—

 
4.2

LDI (Liability Driven Investment)
 
13.3

 
—

 
13.3

 
—

Cash and cash equivalents (b)
 
2.8

 
2.8

 
—

 
—

Total pension assets
 
$
115.5

 
$
34.2

 
$
77.1

 
$
4.2



(a)
The assets are invested through managed funds that are valued using inputs derived principally from quoted prices in active markets for the underlying assets in the fund.
(b)
The carrying value of cash and cash equivalents approximates fair value because of the short-term maturity of these instruments.
Schedule of changes in fair value of pension assets valued using significant unobservable inputs (Level 3)
The change in fair value of the Pension Plan assets valued using significant unobservable inputs (Level 3) is presented below:
 
2017
 
2016
Significant unobservable inputs (Level 3), beginning of period
$
10.9

 
$
12.9

Unrealized gain (loss) on asset still held
(6.7
)
 
(2.0
)
Significant unobservable inputs (Level 3), end of period
$
4.2

 
$
10.9
Schedule of weighted-average actuarial assumptions used to determine the benefit obligation and net periodic benefit cost
The table below presents the weighted-average actuarial assumptions used to determine the benefit obligation and net periodic benefit cost for the Pension Plans.
 
 
U.K. Plan
 
Canadian Plan
 
 
2017
 
2016
 
2015
 
2017
 
2016
 
2015
Discount rates:
 
 
 
 
 
 
 
 
 
 
 
 
Benefit obligation
 
2.60
%
 
2.80
%
 
4.00
%
 
4.00
%
 
4.00
%
 
4.15
%
Net periodic pension cost
 
2.80
%
 
4.00
%
 
3.65
%
 
3.60
%
 
4.15
%
 
4.00
%
Rate of compensation increase
 
1.00
%
 
1.00
%
 
2.00
%
 
3.00
%
 
3.00
%
 
3.00
%
Expected return on assets
 
4.80
%
 
5.70
%
 
6.30
%
 
6.00
%
 
6.25
%
 
6.25
%