Pension and Other Postretirement Benefits (Details) - USD ($)
$ in Millions |
3 Months Ended |
9 Months Ended |
12 Months Ended |
Oct. 01, 2016 |
Oct. 03, 2015 |
Oct. 01, 2016 |
Oct. 03, 2015 |
Dec. 31, 2015 |
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
|
|
| Defined Benefit Plan, Increase (Decrease) in pension expense due to change in assumption, asset return |
$ 1.4
|
|
$ 4.2
|
|
|
| Defined Benefit Plan, Contributions By Employer For Nonqualified Pension Plan |
|
|
2.7
|
$ 2.7
|
|
| Defined Benefit Plan, Contributions by Employer For Qualified Pension Plans |
|
|
70.0
|
70.0
|
|
| Pension Plans [Member] |
|
|
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
|
|
| Interest cost |
8.9
|
$ 11.9
|
26.8
|
35.9
|
|
| Expected return on plan assets |
(9.6)
|
(13.9)
|
(28.8)
|
(41.7)
|
|
| Amortization of prior service credits |
0.0
|
0.0
|
0.0
|
0.0
|
|
| Amortization of net actuarial losses |
4.3
|
4.9
|
13.0
|
14.6
|
|
| Net pension and other benefit costs |
$ 3.6
|
2.9
|
$ 11.0
|
8.8
|
|
| Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate |
3.58%
|
|
3.58%
|
|
4.40%
|
| Defined Benefit Plan, Increase (Decrease) In Interest Costs For Pension and Other Postretirement Benefits Due To Change In Discount Rate Methodology |
$ 2.0
|
|
$ 6.0
|
|
|
| Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Return on Assets |
|
|
5.25%
|
|
6.00%
|
| Other Postretirement Benefit Plans [Member] |
|
|
|
|
|
| Defined Benefit Plan Disclosure [Line Items] |
|
|
|
|
|
| Interest cost |
0.4
|
0.4
|
$ 1.1
|
1.3
|
|
| Expected return on plan assets |
0.0
|
0.0
|
0.0
|
0.0
|
|
| Amortization of prior service credits |
(0.1)
|
(0.2)
|
(0.4)
|
(0.5)
|
|
| Amortization of net actuarial losses |
0.0
|
0.4
|
0.0
|
1.0
|
|
| Net pension and other benefit costs |
$ 0.3
|
$ 0.6
|
$ 0.7
|
$ 1.8
|
|
| Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Discount Rate |
3.30%
|
|
3.30%
|
|
4.23%
|
| Defined Benefit Plan, Increase (Decrease) In Interest Costs For Pension and Other Postretirement Benefits Due To Change In Discount Rate Methodology |
$ 0.1
|
|
$ 0.3
|
|
|