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Employee Benefits (Tables)
 12 Months Ended
Dec. 31, 2018
Retirement Benefits [Abstract]  
Reconciliation of the beginning and ending balances of projected benefit obligation and fair value of plan assets [Table Text Block]
The reconciliation of the beginning and ending balances of the projected benefit obligation and the fair value of plan assets for the years ended December 31, 2018 and 2017, and the funded status at December 31, 2018 and 2017, is as follows:

(in millions)
2018
2017
Change in benefit obligation:
 
 
Benefit obligation at beginning of year
$
1,228.4

$
1,233.6

Service cost (a)
—

5.4

Interest cost
44.1

51.1

Benefits paid
(110.4
)
(108.0
)
Actuarial (gain) loss
(88.5
)
63.5

Expenses paid from assets (a)
—

(6.9
)
Plan amendments
—

(10.7
)
Other
(0.4
)
0.4

Benefit obligation at year end
$
1,073.2

$
1,228.4

Change in plan assets:
 
 
Fair value of plan assets at prior year end
$
998.3

$
878.7

Actual return on plan assets (a)
(27.8
)
166.1

Employer contributions
15.2

68.0

Benefits paid
(110.4
)
(108.0
)
Expenses paid from assets (a)
—

(6.9
)
Other
(0.4
)
0.4

Fair value of plan assets at year end
$
874.9

$
998.3

Funded status at year end
$
(198.3
)
$
(230.1
)

(a)
Due to the adoption of ASU 2017-07, Improving the Presentation of Net Periodic Pension Cost and Net Periodic Postretirement Benefit Cost, all administrative costs are now being presented as nonoperating as there are no service costs due to the frozen status of the plans. This resulted in the reclassification of administrative costs, which are now a component of “Actual return on plan assets.”

Amounts recognized for pension [Table Text Block]
Amounts recognized in the consolidated balance sheets for pension benefits at December 31 are as follows:

(in millions)
2018
2017
Noncurrent assets
$
2.7

$
3.3

Current liabilities
0.8

0.8

Noncurrent liabilities
200.2

232.6
Amounts recognized in accumulated other comprehensive loss [Table Text Block]
Amounts recognized in accumulated other comprehensive loss at December 31 consist of:

(in millions)
2018
2017
Net actuarial loss
$
368.9

$
395.3

Net prior service credit
(10.3
)
(10.7
)
Total
$
358.6

$
384.6
Information for penison plans with ABO in excess of plan assets [Table Text Block]
Information for pension plans with an accumulated benefit obligation (“ABO”) in excess of plan assets and plan assets that exceed ABO at December 31, 2018 and 2017 is as follows:

 
 
At December 31, 2018
(in millions)
 
ABO Exceeds Assets
Assets Exceed ABO
Total
Projected benefit obligation
 
$
927.6

$
145.6

$
1,073.2

Accumulated benefit obligation
 
927.6

145.6

1,073.2

Fair value of plan assets
 
726.6

148.3

874.9


 
 
At December 31, 2017
(in millions)
 
ABO Exceeds Assets
Assets Exceed ABO
Total
Projected benefit obligation
 
$
1,223.9

$
4.5

$
1,228.4

Accumulated benefit obligation
 
1,223.9

4.2

1,228.1

Fair value of plan assets
 
993.0

5.3

998.3
Schedule of assumptions used [Table Text Block]
Weighted average actuarial assumptions used to determine benefit obligations at December 31:

 
2018
2017
Discount rate
4.44
%
3.77
%









Weighted average assumptions used to determine net periodic benefit cost for the years ended December 31:

 
2018
2017
2016
Discount rate
3.77
%
4.27
%
4.81
%
Expected rate of return on assets
7.0
%
7.0
%
7.0
%
Mortality table(a)
RP-2014
(MP-2016 Scale, Custom)

RP-2014
(MP-2016 Scale, Custom)

RP-2014
(MP-2016 Scale, Custom)


(a) The 2018, 2017 and 2016 mortality tables were based on a custom mortality improvement scale to reflect expectations of underlying plan participants
Schedule Of Asset Allocation And Targeted Long Term Asset Allocation
Our asset allocation as of December 31, 2018 and 2017, and targeted long-term asset allocation for the plans are as follows:
 
2018
2017
Target
Equities
39.0
%
41.0
%
38.0
%
Debt Securities
24.0
%
27.0
%
30.0
%
Absolute Return
37.0
%
32.0
%
32.0
%
Schedule of expected benefit payments [Table Text Block]
Expected benefit payments from our qualified and non-qualified defined benefit pension plans for each of the next five years and the total benefit payments for the following five years ended December 31 are as follows:

(in millions)
2019

2020

2021

2022

2023

2023-2027

Expected benefit payments
$
86.7

$
82.8

$
80.2

$
78.1

$
75.6

$
353.0
Schedule of Costs of Retirement Plans [Table Text Block]
The components of our net periodic pension cost, other post-retirement costs and other amounts recognized in other comprehensive loss (income) for the years ended December 31, 2018, 2017 and 2016 were as follows:

(in millions)
2018
2017
2016
Net periodic benefit cost:



Service cost
$
—

$
5.4

$
6.5

Interest cost
44.1

51.1

55.9

Expected return on plan assets
(60.0
)
(59.3
)
(56.2
)
Amortization of prior net losses
14.6

15.5

13.7

Amortization of prior net service credit
(0.4
)
—

—

Settlement adjustment
10.9

7.6

—

Net periodic pension cost
$
9.2

$
20.3

$
19.9

Other changes in plan assets and benefit obligations recognized in other comprehensive loss (income):



Net actuarial gains (losses) and other adjustments
$
(0.9
)
$
(43.7
)
$
69.5

Net prior service credit
—

(10.7
)
—

Settlement adjustment
(10.9
)
(7.6
)
—

Amortization of prior net losses
(14.6
)
(15.5
)
(13.7
)
Amortization of prior net service credit
0.4

—

—

Total recognized in other comprehensive loss (income)
(26.0
)
(77.5
)
55.8

Total recognized in net periodic benefit cost and other comprehensive loss (income)
$
(16.8
)
$
(57.2
)
$
75.7
Pension assets at fair value [Table Text Block]
The tables below detail by level, within the fair value hierarchy, the pension assets at fair value as of December 31, 2018 and December 31, 2017:

 
Pension Assets at Fair Value as of December 31, 2018
(in millions)
Total
Level 1
Level 2
Level 3
Equities
$
67.7

$
65.5

$
2.2

$
—

Private equities
43.4

—

—

43.4

Fixed income:
 
 
 
 
   Corporate and other
24.8

7.7

16.2

0.9

   Government
177.1

67.2

109.9

—

Interest bearing
25.1

(10.5
)
35.6

—

Investments measured at NAV(a)
536.8

 
 
 
Total plan assets
$
874.9

$
129.9

$
163.9

$
44.3


 
Pension Assets at Fair Value as of December 31, 2017
(in millions)
Total
Level 1
Level 2
Level 3
Equities
$
104.1

$
101.5

$
2.6

—

Private equities
46.6

—

—

46.6

Fixed income:
 



   Corporate and other
34.2

9.6

18.6

6.0

   Government
210.3

54.2

156.1

—

Interest bearing
40.5

5.0

35.5

—

Investments measured at NAV(a)
562.6

$
—

$
—

$
—

Total plan assets
$
998.3

$
170.3

$
212.8

$
52.6


(a) Certain investments that are measured at fair value using the NAV per share (or its equivalent) practical expedient have not been
categorized in the fair value hierarchy.
Assets measured at fair value on a recurring basis (Level 3) [Table Text Block]
The table below presents the activity of our assets measured at fair value on a recurring basis using significant unobservable inputs (Level 3):
(in millions)
Private
Equities
Fixed income
Total Level 3
Balance at December 31, 2016
$
38.3

$
3.5

$
41.8

Purchases
1.9

2.0

3.9

Sales
(1.1
)
—

(1.1
)
Unrealized gains
7.5

0.5

8.0

Balance at December 31, 2017
$
46.6

$
6.0

$
52.6

Purchases
—

0.6

0.6

Sales
(0.3
)
—

(0.3
)
Unrealized losses
(2.9
)
(5.7
)
(8.6
)
Balance at December 31, 2018
$
43.4

$
0.9

$
44.3
Level 3 assets using NAV [Table Text Block]
The following table sets forth a summary of the assets for which a reported NAV is used to estimate the fair value as of December 31, 2018:

 
Fair value estimated using Net Asset Value per Share
(in millions)
Fair Value
Unfunded Commitments
Redemption Frequency
Redemption Notice Period
Private equities(a)
$
155.2

$
2.8

Redemptions not permitted
Fixed income(b)
189.2

0.5

Redemptions not permitted
Equities(c)
84.0

—

Monthly
3-30 days
Absolute return(d)
108.4

—

Monthly, Quarterly
2-45 days
Total
$
536.8

 
 
 
(a)
Consists of private equity investments in pharmaceuticals and companies primarily in the technology and healthcare sectors.
(b)
Primarily consists of investments in royalty payments from marketers of pharmaceuticals and related debt securities.
(c)
Consists of public equity investments in U.S. and non-U.S. markets.
(d)
Consists of investments in global markets, including derivative securities of equity and fixed income indexes, commodities and interest rates.

The following table sets forth a summary of the assets for which a reported NAV is used to estimate the fair value as of December 31, 2017:
 
Fair value estimated using Net Asset Value per Share
(in millions)
Fair Value
Unfunded Commitments
Redemption Frequency
Redemption Notice Period
Private equities(a)
$
143.9

$
8.2

Redemptions not permitted
Fixed income(b)
181.0

0.5

Redemptions not permitted
Equities(c)
112.7

—

Monthly
3-30 days
Absolute return(d)
125.0

—

Monthly, Quarterly
2-45 days
Total
$
562.6

 
 
 
(a)
Consists of private equity investments in pharmaceuticals and companies primarily in the technology and healthcare sectors.
(b)
Primarily consists of investments in royalty payments from marketers of pharmaceuticals and related debt securities.
(c)
Consists of public equity investments in U.S. and non-U.S. markets.
(d)
Consists of investments in global markets, including derivative securities of equity and fixed income indexes, commodities and interest rates.
Schedule of multiemployer plans [Table Text Block]
The following table provides additional information related to our participation in individually significant multi-employer pension plans for the year ended December 31, 2018:




 


Pension Protection Zone Status(b)
Funding Improvement or
Rehabilitation Plan
Employer Surcharge Imposed
Expiration Date of Collective-Bargaining Agreement
Pension Fund(a)
EIN Number
2018
2017
Central States, Southeast and Southwest Areas Pension Fund
36-6044243
Critical and Declining
Critical and Declining
Yes
No
3/31/2019
Teamsters National 401(k) Savings Plan(c)
52-1967784
N/A
N/A
N/A
No
3/31/2019
Road Carriers Local 707 Pension Fund
51-6106510
Critical and Declining
Critical and Declining
Yes
No
3/31/2019
Teamsters Local 641 Pension Fund
22-6220288
Critical and Declining
Critical and Declining
Yes
No
3/31/2019
(a)  
The determination of individually significant multi-employer plans is based on the relative contributions to the plans over the periods presented as well as other factors.
(b)  
The Pension Protection Zone Status is based on information that the Company obtained from the plans’ Forms 5500. Unless otherwise noted, the most recent PPA zone status available for 2018 and 2017 is for the plan’s year-end during calendar years 2017 and 2016, respectively. Among other factors, plans in the critical or critical and declining zone are generally less than 65 percent funded, plans in the endangered zone are less than 80 percent funded, and plans in the green zone are at least 80 percent funded.
(c)  
The policies of the Western Conference of Teamsters Pension Trust precluded the Company from reentering the plan on June 1, 2011. The plan did not assess a withdrawal liability and has not done so since June 1, 2011. Contributions related to the employees previously covered by this plan are now being made to the Teamsters National 401(k) Plan.
We expensed the following amounts related to these plans for the years ended December 31:

(in millions)
2018
2017
2016
Health and welfare
$
499.3

$
482.6

$
453.1

Pension
115.5

98.1

90.3

Total
$
614.8

$
580.7

$
543.4
Schedule of multiemployer plans [Table Text Block]
The following table provides additional information related to our participation in individually significant multi-employer pension plans for the year ended December 31, 2018:




 


Pension Protection Zone Status(b)
Funding Improvement or
Rehabilitation Plan
Employer Surcharge Imposed
Expiration Date of Collective-Bargaining Agreement
Pension Fund(a)
EIN Number
2018
2017
Central States, Southeast and Southwest Areas Pension Fund
36-6044243
Critical and Declining
Critical and Declining
Yes
No
3/31/2019
Teamsters National 401(k) Savings Plan(c)
52-1967784
N/A
N/A
N/A
No
3/31/2019
Road Carriers Local 707 Pension Fund
51-6106510
Critical and Declining
Critical and Declining
Yes
No
3/31/2019
Teamsters Local 641 Pension Fund
22-6220288
Critical and Declining
Critical and Declining
Yes
No
3/31/2019
(a)  
The determination of individually significant multi-employer plans is based on the relative contributions to the plans over the periods presented as well as other factors.
(b)  
The Pension Protection Zone Status is based on information that the Company obtained from the plans’ Forms 5500. Unless otherwise noted, the most recent PPA zone status available for 2018 and 2017 is for the plan’s year-end during calendar years 2017 and 2016, respectively. Among other factors, plans in the critical or critical and declining zone are generally less than 65 percent funded, plans in the endangered zone are less than 80 percent funded, and plans in the green zone are at least 80 percent funded.
(c)  
The policies of the Western Conference of Teamsters Pension Trust precluded the Company from reentering the plan on June 1, 2011. The plan did not assess a withdrawal liability and has not done so since June 1, 2011. Contributions related to the employees previously covered by this plan are now being made to the Teamsters National 401(k) Plan.
We expensed the following amounts related to these plans for the years ended December 31:

(in millions)
2018
2017
2016
Health and welfare
$
499.3

$
482.6

$
453.1

Pension
115.5

98.1

90.3

Total
$
614.8

$
580.7

$
543.4
Pension amounts contributed by fund [Table Text Block]
The following table provides the pension amounts contributed by fund for those funds that are considered to be individually significant:

(in millions)
2018
2017
2016
Central States, Southeast and Southwest Areas Pension Plan
$
70.7

$
58.8

$
51.8

Teamsters National 401(k) Savings Plan
14.7

13.1

12.5

Road Carriers Local 707 Pension Fund
2.2

2.2

1.8

Teamsters Local 641 Pension Fund
1.8

1.5

1.3