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Financing Arrangements - Long-term Debt (Details 2) - USD ($) $ in Millions | 12 Months Ended |
--- | --- | ---
Dec. 31, 2020 | Dec. 31, 2018 | Nov. 18, 2016
Term Loan Facility |  |  |
Debt Instrument |  |  |
Long term debt including current maturities |  |  | $ 720.0
Long-term debt, prepayment |  | $ 684.0 |
Senior Notes | Senior Notes Due 2022 [Member] |  |  |
Debt Instrument |  |  |
Long term debt including current maturities | $ 550.0 |  |
Stated interest rate | 3.25% |  |
Senior Notes | Senior Notes Due 2027 [Member] |  |  |
Debt Instrument |  |  |
Long term debt including current maturities | $ 700.0 |  |
Stated interest rate | 4.05% |  |
Senior Notes | Senior Notes Due 2023 |  |  |
Debt Instrument |  |  |
Long term debt including current maturities | $ 900.0 |  |
Stated interest rate | 4.25% |  |
Senior Notes | Senior Notes Due 2033 |  |  |
Debt Instrument |  |  |
Long term debt including current maturities | $ 500.0 |  |
Stated interest rate | 5.45% |  |
Senior Notes | Senior Notes Due 2043 |  |  |
Debt Instrument |  |  |
Long term debt including current maturities | $ 600.0 |  |
Stated interest rate | 5.625% |  |
Senior Notes | Senior Notes Due 2021 |  |  |
Debt Instrument |  |  |
Long term debt including current maturities | $ 450.0 |  |
Stated interest rate | 3.75% |  |
Senior Notes | Senior Notes Due 2041 |  |  |
Debt Instrument |  |  |
Long term debt including current maturities | $ 300.0 |  |
Stated interest rate | 4.875% |  |
Bank Loan |  |  |
Debt Instrument |  |  |
Interest rate margin on LIBOR | 1.25% |  |
Debentures | Debentures Due 2028 |  |  |
Debt Instrument |  |  |
Long term debt including current maturities | $ 147.1 |  |

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- Definition Amount, before unamortized (discount) premium and debt issuance costs, of long-term debt. Includes, but is not limited to, notes payable, bonds payable, commercial loans, mortgage loans, convertible debt, subordinated debt and other types of debt. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 470 -SubTopic 20 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=120520924&loc=SL6031897-161870 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-03(16)) -URI http://asc.fasb.org/extlink&oid=120400017&loc=d3e572229-122910 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(22)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 Reference 4: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 210 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-03(16)) -URI http://asc.fasb.org/extlink&oid=120398452&loc=d3e534808-122878 + Details
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