Benefit Plans - Additional Information (Detail) - USD ($)
$ in Millions

12 Months Ended

Dec. 31, 2015

Dec. 31, 2014

Dec. 31, 2013

Pension and other post-retirement plans

Pension plan contribution

$ 21.2

$ 24.6

Obligations and funded status

Defined accumulated benefit obligation plans

$ 840.0

$ 887.5

Expected rate of return on plan assets

3.65%

4.56%

3.75%

Pension plan assets yielded returns

(3.20%)

22.30%

(9.90%)

Pension plans assets

Asset allocation

98.00%

Savings plan

401(k) plan description

Under the 401(k) plan, eligible U.S. employees may voluntarily contribute a percentage of their eligible compensation. We match contributions made by employees who meet certain eligibility and service requirements. Our matching contribution is 100% of eligible employee contributions for the first 1% of eligible compensation and 50% of the next 5% of eligible compensation.

Annual eligible compensation percentage

1.50%

Participants are 100% vested in employer match

after 3 years of service.

Other retirement compensation

Other accrued retirement compensation

$ 65.8

$ 70.2

Maximum

Pension plans assets

Expected contribution

40.0

Minimum

Pension plans assets

Expected contribution

32.0

U.S. Pension Plans

Pension and other post-retirement plans

Benefits paid

$ 9.1

$ 9.3

Obligations and funded status

Discount rate

4.21%

3.63%

4.51%

Non-US Pension Plans

Pension and other post-retirement plans

Benefits paid

$ 17.9

$ 17.9

Non-US Pension Plans | Maximum

Obligations and funded status

Discount rate

0.50%

0.50%

0.50%

Expected rate of return on plan assets

6.00%

6.40%

6.50%

Non-US Pension Plans | Minimum

Obligations and funded status

Discount rate

4.25%

4.25%

5.00%

Expected rate of return on plan assets

1.00%

1.00%

1.00%

First 1%

Savings plan

Matching contribution to eligible employee contributions

100.00%

Percent of eligible compensation

1.00%

Next 5%

Savings plan

Matching contribution to eligible employee contributions

50.00%

Percent of eligible compensation

5.00%

Flow 401(K) Plan

Savings plan

Matching contribution to eligible employee contributions

500.00%

Percent of eligible compensation

1.00%

Years of service

3 years

Matching contribution to eligible employee contributions

100.00%

401(k) plan and ESOP combined expenese

$ 26.5

$ 21.5

$ 26.8

An Additional 1% Match on Flow 401(K) Plan

Savings plan

Additional matching contribution to eligible employee contributions

1.00%

An Additional 1% Match on Flow 401(K) Plan | Maximum

Savings plan

Years of service

19 years

An Additional 1% Match on Flow 401(K) Plan | Minimum

Savings plan

Years of service

10 years

An Additional 2% Match on Flow 401(K) Plan

Savings plan

Additional matching contribution to eligible employee contributions

2.00%

An Additional 2% Match on Flow 401(K) Plan | Maximum

Savings plan

Years of service

24 years

An Additional 2% Match on Flow 401(K) Plan | Minimum

Savings plan

Years of service

20 years

An Additional 3% Match on Flow 401(K) Plan

Savings plan

Additional matching contribution to eligible employee contributions

3.00%

An Additional 3% Match on Flow 401(K) Plan | Maximum

Savings plan

Years of service

29 years

An Additional 3% Match on Flow 401(K) Plan | Minimum

Savings plan

Years of service

25 years

An Additional 4% Match on Flow 401(K) Plan

Savings plan

Additional matching contribution to eligible employee contributions

4.00%

An Additional 4% Match on Flow 401(K) Plan | Minimum

Savings plan

Years of service

30 years