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Financing Arrangements - Long-term debt - Stated value (Details 3) - USD ($)
$ in Millions

12 Months Ended

Dec. 31, 2020

Dec. 31, 2019

Long-term Debt, Excluding Current Maturities

Stated value of issued debt

$ 4,570.4

$ 4,563.8

Fair value adjustment of debt

12.9

15.2

Debt Instrument, Unamortized Discount

5.3

6.3

Total long term debt

4,578.0

4,572.7

Stated value of current portion of issued debt

502.9

45.9

Fair value adjustment of current portion of long-term debt

2.3

2.3

Debt Instrument, Unamortized Discount, Current

1.0

1.0

Carrying Value, current portion

504.2

47.2

Stated value of noncurrent portion of issued debt

4,067.5

4,517.9

Fair Market Value Adjustment, Total long term debt noncurrent

10.6

12.9

Debt Instrument, Unamortized Discount, Noncurrent

4.3

5.3

Total long-term debt, less current maturities

4,073.8

4,525.5

Maturities of Long-term Debt

2020

504.2

2021

610.6

2022

986.3

2023

174.2

2024

11.6

Thereafter

2,291.1

Total long term debt

4,578.0

4,572.7

Unsecured Notes

Long-term Debt, Excluding Current Maturities

Stated value of issued debt

4,000.0

4,000.0

Fair value adjustment of debt

0.0

0.0

Debt Instrument, Unamortized Discount

5.3

6.3

Total long term debt

$ 3,994.7

3,993.7

Stated interest rates:

Effective interest rate

5.01%

Long-term debt - other disclosures:

Maturity year - earliest

Jan. 01, 2021

Maturity year - latest

Dec. 31, 2043

Maturities of Long-term Debt

Total long term debt

$ 3,994.7

3,993.7

Unsecured Notes | Minimum

Stated interest rates:

Stated interest rate

3.25%

Unsecured Notes | Maximum

Stated interest rates:

Stated interest rate

5.63%

Unsecured Debentures

Long-term Debt, Excluding Current Maturities

Stated value of issued debt

$ 147.1

147.1

Fair value adjustment of debt

0.9

1.0

Debt Instrument, Unamortized Discount

0.0

0.0

Total long term debt

$ 148.0

148.1

Stated interest rates:

Effective interest rate

7.19%

Long-term debt - other disclosures:

Maturity year - latest

Dec. 31, 2028

Maturities of Long-term Debt

Total long term debt

$ 148.0

148.1

Unsecured Debentures | Minimum

Stated interest rates:

Stated interest rate

0.00%

Unsecured Debentures | Maximum

Stated interest rates:

Stated interest rate

7.30%

Term loan

Long-term Debt, Excluding Current Maturities

Stated value of issued debt

^[1]

$ 0.0

0.0

Fair value adjustment of debt

0.0

0.0

Debt Instrument, Unamortized Discount

0.0

0.0

Total long term debt

^[1]

$ 0.0

0.0

Stated interest rates:

The reference rate for the variable rate of the Term Loans

LIBOR

Interest rate margin on LIBOR

1.25%

Long-term debt - other disclosures:

Maturity year - latest

Nov. 18, 2021

Maturities of Long-term Debt

Total long term debt

^[1]

$ 0.0

0.0

Finance Leases

Long-term Debt, Excluding Current Maturities

Stated value of issued debt

344.5

345.1

Fair value adjustment of debt

0.0

0.0

Debt Instrument, Unamortized Discount

0.0

0.0

Total long term debt

$ 344.5

345.1

Stated interest rates:

Effective interest rate

3.80%

Long-term debt - other disclosures:

Maturity year - earliest

Jan. 01, 2020

Maturity year - latest

Dec. 31, 2030

Maturities of Long-term Debt

Total long term debt

$ 344.5

345.1

Finance Leases | Minimum

Stated interest rates:

Stated interest rate

0.86%

Finance Leases | Maximum

Stated interest rates:

Stated interest rate

19.72%

Other

Long-term Debt, Excluding Current Maturities

Stated value of issued debt

$ 78.8

^[2]

71.6

Fair value adjustment of debt

12.0

14.2

Debt Instrument, Unamortized Discount

0.0

0.0

Total long term debt

$ 90.8

^[2]

85.8

Stated interest rates:

Effective interest rate

3.13%

Long-term debt - other disclosures:

Maturity year - earliest

Jan. 01, 2021

Maturity year - latest

Dec. 31, 2026

Maturities of Long-term Debt

Total long term debt

$ 90.8

^[2]

$ 85.8

Other | Minimum

Stated interest rates:

Stated interest rate

2.50%

Other | Maximum

Stated interest rates:

Stated interest rate

9.98%

[1]	Term loan facility is pre-payable.
[2]	Includes deferred financing fees related to our long term debt.

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