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Pension Plans and Other Postretirement Benefit Plans
 9 Months Ended
Sep. 30, 2016
Pension and Other Postretirement Benefit Expense [Abstract]  
Pension Plans and Other Postretirement Benefit Plans
Pension Plans    The following table presents the funded status of Grace's fully-funded, underfunded, and unfunded pension plans:
(In millions)
September 30,
2016
 
December 31,
2015
Overfunded defined benefit pension plans
$
0.4

 
$
—

Underfunded defined benefit pension plans
(70.3
)
 
(73.2
)
Unfunded defined benefit pension plans
(308.7
)
 
(304.3
)
Total underfunded and unfunded defined benefit pension plans
(379.0
)
 
(377.5
)
Pension liabilities included in other current liabilities
(14.3
)
 
(14.2
)
Net funded status
$
(392.9
)
 
$
(391.7
)

Fully-funded plans include several advance-funded plans where the fair value of the plan assets exceeds the projected benefit obligation ("PBO"). This group of plans was overfunded by $0.4 million as of September 30, 2016, and the overfunded status is included in "other assets" in the Consolidated Balance Sheets. Underfunded plans include a group of advance-funded plans that are underfunded on a PBO basis. Unfunded plans include several plans that are funded on a pay-as-you-go basis, and therefore, the entire PBO is unfunded. The combined balance of the underfunded and unfunded plans was $393.3 million as of September 30, 2016.
Components of Net Periodic Benefit Cost (Income)
 
Three Months Ended September 30,
 
2016
 
2015
 
Pension
 
Other Post
Retirement
 
Pension
 
Other Post
Retirement
(In millions)
U.S.
 
Non-U.S.
 
 
U.S.
 
Non-U.S.
 
Service cost
$
4.5

 
$
1.7

 
$
—

 
$
6.4

 
$
3.0

 
$
—

Interest cost
10.1

 
1.3

 
—

 
13.7

 
4.1

 
—

Expected return on plan assets
(14.2
)
 
(0.2
)
 
—

 
(17.6
)
 
(3.3
)
 
—

Amortization of prior service (credit) cost
(0.1
)
 
—

 
(0.5
)
 
0.1

 
—

 
(0.9
)
Amortization of net deferred actuarial loss
—

 
—

 
0.1

 
—

 
—

 
0.2

Curtailment gain
—

 
(0.2
)
 
—

 
—

 
—

 
(4.5
)
Net periodic benefit cost (income)
0.3

 
2.6

 
(0.4
)
 
2.6

 
3.8

 
(5.2
)
Less: discontinued operations
—

 
—

 
—

 
(0.7
)
 
(0.6
)
 
0.4

Net periodic benefit cost (income) from continuing operations
$
0.3

 
$
2.6

 
$
(0.4
)
 
$
1.9

 
$
3.2

 
$
(4.8
)

 
Nine Months Ended September 30,
 
2016
 
2015
 
Pension
 
Other Post
Retirement
 
Pension
 
Other Post
Retirement
(In millions)
U.S.
 
Non-U.S.
 
 
U.S.
 
Non-U.S.
 
Service cost
$
13.9

 
$
5.4

 
$
—

 
$
19.3

 
$
8.9

 
$
—

Interest cost
30.8

 
4.6

 
—

 
41.3

 
12.3

 
0.1

Expected return on plan assets
(43.0
)
 
(1.5
)
 
—

 
(52.8
)
 
(10.0
)
 
—

Amortization of prior service (credit) cost
(0.2
)
 
—

 
(1.7
)
 
0.2

 
—

 
(2.8
)
Amortization of net deferred actuarial loss
—

 
—

 
0.4

 
—

 
—

 
0.5

Curtailment gain
—

 
(0.9
)
 
—

 
—

 
—

 
(4.5
)
Net periodic benefit cost (income)
1.5

 
7.6

 
(1.3
)
 
8.0

 
11.2

 
(6.7
)
Less: discontinued operations
(0.5
)
 
(0.2
)
 
—

 
(2.2
)
 
(1.6
)
 
1.2

Net periodic benefit cost (income) from continuing operations
$
1.0

 
$
7.4

 
$
(1.3
)
 
$
5.8

 
$
9.6

 
$
(5.5
)

Plan Contributions and Funding    Grace intends to satisfy its funding obligations under the U.S. qualified pension plans and to comply with all of the requirements of the Employee Retirement Income Security Act of 1974 ("ERISA"). For ERISA purposes, funded status is calculated on a different basis than under U.S. GAAP.
Grace intends to fund non-U.S. pension plans based on applicable legal requirements and actuarial and trustee recommendations.
Defined Contribution Retirement Plan    Grace sponsors a defined contribution retirement plan for its employees in the United States. This plan is qualified under section 401(k) of the U.S. tax code. Currently, Grace contributes an amount equal to 100% of employee contributions, up to 6% of an individual employee's salary or wages. Grace's costs related to this benefit plan for the three and nine months ended September 30, 2016, were $2.9 million and $8.3 million compared with $2.5 million and $7.8 million for the corresponding prior-year periods.