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Employee Benefit Plans (Tables)
 12 Months Ended
Dec. 31, 2018
Retirement Benefits [Abstract]  
Accumulated Other Comprehensive Income (Loss) Pretax Amounts Not Yet Reclassified in Net Periodic Benefit Cost
Included in accumulated other comprehensive loss as of December 31, 2018 and 2017 are:
 
Pension Benefits
 
Other Postretirement Benefits
 
December 31,
 
December 31,
(In millions)
2018
 
2017
 
2018
 
2017
Unrecognized actuarial (gains) losses
$
(10.3
)
 
$
(8.6
)
 
$
1.1

 
$
2.0

Unrecognized prior service costs
12.1

 
2.0

 
0.7

 
0.7

Total
$
1.8

 
$
(6.6
)
 
$
1.8

 
$
2.7
Change in Accumulated Income (Loss) Relating to Defined Benefit Pension and Other Postretirement Benefits
The increase in accumulated other comprehensive income in 2018 relating to pension benefits and other postretirement benefits consists of:
(In millions)
Pension Benefits
 
Other Postretirement Benefits
Unrecognized actuarial (gain)/loss
$
(2.1
)
 
$
(0.6
)
Amortization of actuarial (gain)/loss
(0.1
)
 
(0.3
)
Unrecognized prior service costs
6.6

 
—

Amortization of prior service costs
(0.4
)
 
—

Impact of foreign currency translation
0.7

 
—

Net change
$
4.7

 
$
(0.9
)
Net Periodic Benefit Cost
Components of net periodic benefit cost for the years ended December 31, 2018, 2017 and 2016 were as follows:
 
Pension Benefits
 
Other Postretirement Benefits
 
December 31,
 
December 31,
(In millions)
2018
 
2017
 
2016
 
2018
 
2017
 
2016
Service cost
$
19.2

 
$
20.1

 
$
17.4

 
$
0.6

 
$
0.7

 
$
0.6

Interest cost
13.0

 
13.6

 
8.2

 
1.5

 
1.6

 
1.3

Expected return on plan assets
(14.4
)
 
(14.3
)
 
(10.9
)
 
—

 
—

 
—

Plan curtailment, settlement and termination
(0.1
)
 
(1.7
)
 
(2.4
)
 
—

 
—

 
—

Amortization of prior service costs
0.3

 
0.2

 
0.3

 
—

 
—

 
—

Recognized net actuarial (gains) losses
(0.1
)
 
0.3

 
0.8

 
0.2

 
0.4

 
0.3

Net periodic benefit cost
$
17.9

 
$
18.2

 
$
13.4

 
$
2.3

 
$
2.7

 
$
2.2
Changes in Projected Benefit Obligations, Fair Value of Plan Assets, and Funded Status of Plan
The table below presents components of the change in projected benefit obligation, change in plan assets and funded status at December 31, 2018 and 2017.
 
Pension Benefits
 
Other Postretirement Benefits
(In millions)
2018
 
2017
 
2018
 
2017
Change in Projected Benefit Obligation
 
 
 
 
 
 
 
Projected benefit obligation, beginning of year
$
665.2

 
$
632.9

 
$
35.1

 
$
38.0

Service cost
19.2

 
20.1

 
0.7

 
0.7

Interest cost
13.0

 
13.6

 
1.3

 
1.6

Participant contributions
1.0

 
1.0

 
0.2

 
0.2

Transferred liabilities
16.1

 
0.5

 
—

 
—

Plan settlements and terminations
(7.6
)
 
(28.4
)
 
—

 
—

Actuarial losses (gains)
(27.4
)
 
9.3

 
(0.6
)
 
(2.7
)
Benefits paid
(24.9
)
 
(24.5
)
 
(2.7
)
 
(2.5
)
Impact of foreign currency translation
(19.2
)
 
40.7

 
—

 
(0.2
)
Projected benefit obligation, end of year
$
635.4

 
$
665.2

 
$
34.0

 
$
35.1

 
 
 
 
 
 
 
 
Change in Plan Assets
 
 
 
 
 
 
 
Fair value of plan assets, beginning of year
$
296.1

 
$
291.7

 
$
—

 
$
—

Actual return on plan assets
(11.0
)
 
21.7

 
—

 
—

Company contributions
28.9

 
31.5

 
2.5

 
2.3

Participant contributions
1.0

 
1.0

 
0.2

 
0.2

Transferred assets
16.1

 
0.5

 
—

 
—

Plan settlements
(16.5
)
 
(28.0
)
 
—

 
—

Benefits paid
(24.9
)
 
(24.5
)
 
(2.7
)
 
(2.5
)
Other
(1.6
)
 
(0.4
)
 
—

 
—

Impact of foreign currency translation
(4.6
)
 
2.6

 
—

 
—

Fair value of plan assets, end of year
283.5

 
296.1

 
—

 
—

Funded status of plans
$
(351.9
)
 
$
(369.1
)
 
$
(34.0
)
 
$
(35.1
)
Net Accrued Benefit Costs Classification on Balance Sheet
Net accrued benefit costs for pension plans and other postretirement benefits are reported in the following components of the Company’s Consolidated Balance Sheets at December 31, 2018 and 2017:
 
Pension Benefits
 
Other Postretirement Benefits
 
December 31,
 
December 31,
(In millions)
2018
 
2017
 
2018
 
2017
Noncurrent assets
$
5.9

 
$
6.0

 
$
—

 
$
—

Current liabilities
(11.9
)
 
(11.7
)
 
(1.7
)
 
(1.6
)
Noncurrent liabilities
(345.9
)
 
(363.4
)
 
(32.3
)
 
(33.5
)
Net accrued benefit costs
$
(351.9
)
 
$
(369.1
)
 
$
(34.0
)
 
$
(35.1
)
Plans with Accumulated Benefit Obligation in Excess of Plan Assets
The projected benefit obligation, accumulated benefit obligation and fair value of plan assets for pension plans with an accumulated benefit obligation in excess of the fair value of plan assets at December 31, 2018 and 2017 were as follows:
 
December 31,
(In millions)
2018
 
2017
Plans with accumulated benefit obligation in excess of plan assets:
 
 
 
Projected benefit obligation
$
502.9

 
$
530.1

Accumulated benefit obligation
483.1

 
506.0

Fair value of plan assets
154.8

 
164.8
Schedule of Allocation of Plan Assets
The table below presents total plan assets by investment category as of December 31, 2018 and 2017 and the classification of each investment category within the fair value hierarchy with respect to the inputs used to measure fair value:
 
December 31, 2018
(In millions)
Level 1
 
Level 2
 
Level 3
 
Total
Cash and cash equivalents
$
3.5

 
$
0.4

 
$
—

 
$
3.9

Equity securities
58.5

 
66.0

 
—

 
124.5

Fixed income securities
65.4

 
58.4

 
—

 
123.8

Assets held by insurance companies and other
0.1

 
7.2

 
24.0

 
31.3

Total
$
127.5

 
$
132.0

 
$
24.0

 
$
283.5

 
December 31, 2017
(In millions)
Level 1
 
Level 2
 
Level 3
 
Total
Cash and cash equivalents
$
2.5

 
$
0.3

 
$
—

 
$
2.8

Equity securities
65.2

 
71.8

 
—

 
137.0

Fixed income securities
45.2

 
57.6

 
—

 
102.8

Assets held by insurance companies and other
10.4

 
23.9

 
19.2

 
53.5

Total
$
123.3

 
$
153.6

 
$
19.2

 
$
296.1
Schedule of Assumptions Used
The following weighted average assumptions were used to determine the benefit obligations for the Company’s defined benefit pension and other postretirement plans as of December 31, 2018 and 2017:
 
Pension Benefits
 
Other Postretirement Benefits
 
2018
 
2017
 
2018
 
2017
Discount rate
2.3
%
 
2.0
%
 
4.3
%
 
3.7
%
Expected return on plan assets
4.9
%
 
4.9
%
 
—
%
 
—
%
Rate of compensation increase
2.9
%
 
2.8
%
 
—
%
 
—
%
The following weighted average assumptions were used to determine the net periodic benefit cost for the Company’s defined benefit pension and other postretirement benefit plans for the three years in the period ended December 31, 2018:
 
Pension Benefits
 
Other Postretirement Benefits
 
2018
 
2017
 
2016
 
2018
 
2017
 
2016
Discount rate
2.0
%
 
2.2
%
 
2.1
%
 
3.7
%
 
4.2
%
 
4.2
%
Expected return on plan assets
4.9
%
 
5.0
%
 
4.9
%
 
—
%
 
—
%
 
—
%
Rate of compensation increase
2.9
%
 
2.8
%
 
3.2
%
 
—
%
 
—
%
 
—
%
Schedule of Effect of One-Percentage-Point Change in Assumed Health Care Cost Trend Rates
If these 2019 healthcare cost trend rates were increased or decreased by one percentage point per year, such increase or decrease would have the following effects:
(In millions)
Increase
 
Decrease
Increase (decrease) in the aggregate of service and interest cost components of annual expense
$
0.1

 
$
(0.1
)
Increase (decrease) in the projected benefit obligation
1.2

 
(1.0
)
Schedule of Expected Benefit Payments
Estimated benefit payments over the next ten years for the Company’s pension plans and retiree health plan are as follows:
(In millions)
Pension Benefits
 
Other Postretirement Benefits
2019
$
32.0

 
$
1.7

2020
34.2

 
1.7

2021
35.7

 
2.0

2022
34.0

 
2.3

2023
36.4

 
2.2

Thereafter
192.1

 
11.6

Total
$
364.4

 
$
21.5