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Employee Benefit Plans (Details)
£ in Millions, shares in Millions, $ in Millions

3 Months Ended

12 Months Ended

Jul. 14, 2015

USD ($)

Dec. 31, 2015

USD ($)

shares

Mar. 28, 2015

USD ($)

Dec. 31, 2014

USD ($)

retiree

shares

Dec. 31, 2014

GBP (£)

retiree

shares

Mar. 29, 2014

USD ($)

employee

Dec. 31, 2015

USD ($)

shares

Dec. 31, 2014

USD ($)

retiree

shares

Dec. 31, 2014

GBP (£)

retiree

shares

Dec. 31, 2013

USD ($)

retiree

Employee benefit plans

Number of retirees assumed by third party for future pension payments | retiree

16,000

Amount paid for obligations assumed by third party

$ 4.8

$ 663.7

Obligations assumed by third party

609.0

Settlement gain (loss) resulting from partial annuitization

4.8

$ 4.8

Number of eligible former employees intended to be offered with voluntary single lump-sum payment option in lieu of a future pension benefit | employee

7,100

Percentage of projected benefit obligation of the Plan settled as a result of lump-sum payments

38.00%

Projected benefit obligation of the Plan settled as a result of lump-sum payments

$ 165.2

Settlement charge

$ 4.6

Actuarial loss

$ (12.0)

$ (14.8)

$ (80.6)

Settlement charges

$ 15.0

Pension plans

Employee benefit plans

Number of shares of common stock held by defined benefit plans | shares

0.0

0.0

0.0

0.0

0.0

0.0

Domestic Pension Plans

Employee benefit plans

Actuarial loss

$ 9.2

$ (59.5)

Settlement charges

^[1]

6.0

$ 160.4

Amount of curtailment gain

$ 5.1

Charge to net periodic pension benefit expense from remeasurement of assets and liabilities of US Plan and SIARP

$ 11.4

Actual Allocations (as a percent)

100.00%

100.00%

100.00%

100.00%

100.00%

100.00%

Mid-point of Target Allocation Range (as a percent)

100.00%

Domestic Pension Plans | Fixed income common trust funds

Employee benefit plans

Actual Allocations (as a percent)

54.00%

53.00%

53.00%

54.00%

53.00%

53.00%

Mid-point of Target Allocation Range (as a percent)

49.00%

Domestic Pension Plans | Commingled global fund allocation

Employee benefit plans

Actual Allocations (as a percent)

16.00%

12.00%

12.00%

16.00%

12.00%

12.00%

Mid-point of Target Allocation Range (as a percent)

18.00%

Domestic Pension Plans | Corporate bonds

Employee benefit plans

Actual Allocations (as a percent)

13.00%

12.00%

12.00%

13.00%

12.00%

12.00%

Mid-point of Target Allocation Range (as a percent)

12.00%

Domestic Pension Plans | Global equity common trust funds

Employee benefit plans

Actual Allocations (as a percent)

11.00%

11.00%

11.00%

11.00%

11.00%

11.00%

Mid-point of Target Allocation Range (as a percent)

10.00%

Domestic Pension Plans | Global equities

Employee benefit plans

Actual Allocations (as a percent)

0.00%

4.00%

4.00%

0.00%

4.00%

4.00%

Mid-point of Target Allocation Range (as a percent)

5.00%

Domestic Pension Plans | U.S. Government securities

Employee benefit plans

Actual Allocations (as a percent)

3.00%

4.00%

4.00%

3.00%

4.00%

4.00%

Mid-point of Target Allocation Range (as a percent)

4.00%

Domestic Pension Plans | Short-term investments

Employee benefit plans

Actual Allocations (as a percent)

^[2]

2.00%

3.00%

3.00%

2.00%

3.00%

3.00%

Mid-point of Target Allocation Range (as a percent)

^[2]

0.00%

Domestic Pension Plans | Other

Employee benefit plans

Actual Allocations (as a percent)

^[3]

1.00%

1.00%

1.00%

1.00%

1.00%

1.00%

Mid-point of Target Allocation Range (as a percent)

^[3]

2.00%

Foreign Pension Plans

Employee benefit plans

Number of retirees assumed by third party for future pension payments | retiree

900

900

900

900

Amount paid for obligations assumed by third party

$ 123.3

£ 79.2

$ 123.3

£ 79.2

Obligations assumed by third party

$ 105.8

£ 68.0

Actuarial loss

$ 6.1

(55.3)

Settlement charges

^[1]

$ 0.0

$ 127.7

Actual Allocations (as a percent)

100.00%

100.00%

100.00%

100.00%

100.00%

100.00%

Mid-point of Target Allocation Range (as a percent)

100.00%

Foreign Pension Plans | Fixed income common trust funds

Employee benefit plans

Actual Allocations (as a percent)

8.00%

8.00%

8.00%

8.00%

8.00%

8.00%

Mid-point of Target Allocation Range (as a percent)

31.00%

Foreign Pension Plans | Global equity common trust funds

Employee benefit plans

Actual Allocations (as a percent)

35.00%

71.00%

71.00%

35.00%

71.00%

71.00%

Mid-point of Target Allocation Range (as a percent)

45.00%

Foreign Pension Plans | Non-U.S. Government securities

Employee benefit plans

Actual Allocations (as a percent)

17.00%

15.00%

15.00%

17.00%

15.00%

15.00%

Mid-point of Target Allocation Range (as a percent)

23.00%

Foreign Pension Plans | Short-term investments

Employee benefit plans

Actual Allocations (as a percent)

^[4]

40.00%

6.00%

6.00%

40.00%

6.00%

6.00%

Mid-point of Target Allocation Range (as a percent)

^[4]

1.00%

Postretirement Plans

Employee benefit plans

Actuarial loss

$ 4.0

$ (14.2)

Settlement charges

$ 1.8

$ 0.0

[1]	Settlements for the U.S. Plan in 2014 include (i) $165.2 paid to participants who accepted the voluntary lump-sum payment option offered in the first quarter of 2014, net of (ii) $4.8 refunded by Mass Mutual to the U.S. Plan in 2014 in connection with the partial settlement of the U.S. Plan in 2013. Settlements of the U.K. Plan in 2014 include GBP 79.2 ($123.3 equivalent) that the U.K. Plan paid Just Retirement to irrevocably assume the obligation to make future pension payments to approximately 900 retirees of the U.K. Plan beginning in the first quarter of 2015 and other lump-sum settlements of GBP 2.8 ($4.4 equivalent) paid to participants in connection with provisions of the U.K. Plan.
[2]	Short-term investments are generally invested in actively managed common trust funds or interest-bearing accounts.
[3]	Assets included in this class at December 31, 2015 and 2014 are comprised primarily of insurance contracts, private equity and publicly traded real estate trusts.
[4]	Short-term investments are generally invested in actively managed common trust funds or interest-bearing accounts. As of December 31, 2015, and in connection with a transition to a new investment advisor, the UK Plan had a significant amount of its assets invested in short-term investments. Following the engagement of the new investment advisor for the UK Plan, we anticipate that asset allocations for the UK Plan and aggregate asset allocations for our foreign plans will be more in-line with targeted allocations.

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Represents the number of eligible former employees intended to be offered with voluntary single lump-sum payment option in lieu of a future pension benefit under the Plan during a designated election period.

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Amount of gain (loss) related to change in benefit obligation resulting from changes in actuarial assumptions, for example, but not limited to, interest, mortality, employee turnover, salary, and temporary deviation from the substantive plan.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 30
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The amount of net gain (loss) recognized in net periodic benefit cost as a result of an event that significantly reduces the expected years of future service of present employees or eliminates for a significant number of employees the accrual of defined benefits for some or all of their future services.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
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-Name Accounting Standards Codification
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