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Long-Term Debt, Schedule of Debt (Details) € in Millions, $ in Millions | Dec. 31, 2020 USD ($) | Apr. 01, 2020 | Feb. 20, 2020 | Dec. 31, 2019 USD ($) | Dec. 31, 2019 EUR (€) | Sep. 10, 2019 | Jan. 31, 2019 | Jan. 09, 2019
--- | --- | --- | --- | --- | --- | --- | --- | ---
Debt |  |  |  |  |  |  |  |
Less deferred debt issuance costs | $ (27.8) |  |  | $ (23.6) |  |  |  |
Total debt | 3,866.5 |  |  | 3,606.7 |  |  |  |
Less current portion | 230.3 |  |  | 403.3 |  |  |  |
Total long-term debt | 3,636.2 |  |  | 3,203.4 |  |  |  |
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Less deferred debt issuance costs |  |  |  |  |  |  |  |
Total debt, Approximate Fair Value | 4,265.4 |  |  | 3,782.7 |  |  |  |
Less current portion, Fair Value | 234.2 |  |  | 403.3 |  |  |  |
Long-term debt, Approximate Fair Value | 4,031.2 |  |  | 3,379.4 |  |  |  |
The "Revolving Credit Facility" | Significant Observable Inputs (Level 2) |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Debt carrying amount, net of unamortized discount or premium before deferred debt issuance costs | 0.0 |  |  | 0.0 |  |  |  |
Total debt, Approximate Fair Value | 0.0 |  |  | 0.0 |  |  |  |
U.S. Commercial Paper Program |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Debt carrying amount, net of unamortized discount or premium before deferred debt issuance costs | 0.0 |  |  | 160.0 |  |  |  |
Unamortized discount | 0.0 |  |  | 0.0 |  |  |  |
U.S. Commercial Paper Program | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Total debt, Approximate Fair Value | 0.0 |  |  | 160.0 |  |  |  |
Euro Commercial Paper Program |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Debt carrying amount, net of unamortized discount or premium before deferred debt issuance costs | 0.0 |  |  | 235.5 | € 210.0 |  |  |
Unamortized premium | 0.0 |  |  | 0.0 |  |  |  |
Euro Commercial Paper Program | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Total debt, Approximate Fair Value | $ 0.0 |  |  | $ 235.5 |  |  |  |
4.00% Senior Notes |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Stated interest rate (as a percent) | 4.00% |  |  | 4.00% | 4.00% |  |  |
Debt carrying amount, net of unamortized discount or premium before deferred debt issuance costs | $ 294.9 |  |  | $ 294.8 |  |  |  |
Unamortized discount | 0.1 |  |  | 0.2 |  |  |  |
4.00% Senior Notes | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Total debt, Approximate Fair Value | $ 303.6 |  |  | $ 304.0 |  |  |  |
2.55% Senior Notes |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Stated interest rate (as a percent) |  |  |  |  |  |  | 2.55% |
3.125% Senior Notes due September 2021 |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Stated interest rate (as a percent) | 3.125% |  |  | 3.125% | 3.125% |  |  |
Debt carrying amount, net of unamortized discount or premium before deferred debt issuance costs | $ 227.7 |  |  | $ 227.6 |  |  |  |
Unamortized discount | 0.0 |  |  | 0.1 |  |  |  |
3.125% Senior Notes due September 2021 | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Total debt, Approximate Fair Value | 231.6 |  |  | $ 231.0 |  |  |  |
2.20% Senior Notes due April 2020 |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Stated interest rate (as a percent) |  | 2.20% |  | 2.20% | 2.20% |  |  |
Debt carrying amount, net of unamortized discount or premium before deferred debt issuance costs | 0.0 |  |  | $ 400.0 |  |  |  |
Unamortized discount |  |  |  | 0.0 |  |  |  |
2.20% Senior Notes due April 2020 | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Total debt, Approximate Fair Value | $ 0.0 |  |  | $ 400.0 |  |  |  |
3.20% Senior Notes due April 2024 |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Stated interest rate (as a percent) | 3.20% |  |  | 3.20% | 3.20% |  |  |
Debt carrying amount, net of unamortized discount or premium before deferred debt issuance costs | $ 349.8 |  |  | $ 349.8 |  |  |  |
Unamortized discount | 0.2 |  |  | 0.2 |  |  |  |
3.20% Senior Notes due April 2024 | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Total debt, Approximate Fair Value | $ 378.1 |  |  | 363.7 |  |  |  |
2.05% Senior Notes due March 2025 |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Stated interest rate (as a percent) | 2.05% |  | 2.05% |  |  |  |  |
Debt carrying amount, net of unamortized discount or premium before deferred debt issuance costs | $ 399.4 |  |  | 0.0 |  |  |  |
Unamortized discount | 0.6 |  |  |  |  |  |  |
2.05% Senior Notes due March 2025 | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Total debt, Approximate Fair Value | $ 420.7 |  |  | 0.0 |  |  |  |
0.750% Euro Senior Notes due May 2026 |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Stated interest rate (as a percent) | 0.75% |  |  |  |  |  |  |
Debt carrying amount, net of unamortized discount or premium before deferred debt issuance costs | $ 608.4 |  |  | 0.0 |  |  |  |
Unamortized discount | 2.4 |  |  |  |  |  |  |
0.750% Euro Senior Notes due May 2026 | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Total debt, Approximate Fair Value | $ 633.6 |  |  | $ 0.0 |  |  |  |
2.000% Euro Senior Notes due October 2028 |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Stated interest rate (as a percent) | 2.00% |  |  | 2.00% | 2.00% |  |  |
Debt carrying amount, net of unamortized discount or premium before deferred debt issuance costs | $ 608.4 |  |  | $ 558.2 |  |  |  |
Unamortized discount | 2.4 |  |  | 2.5 |  |  |  |
2.000% Euro Senior Notes due October 2028 | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Total debt, Approximate Fair Value | $ 694.9 |  |  | $ 622.8 |  |  |  |
4.350% Senior Notes due June 2029 |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Stated interest rate (as a percent) | 4.35% |  |  | 4.35% | 4.35% |  |  | 4.35%
Debt carrying amount, net of unamortized discount or premium before deferred debt issuance costs | $ 499.6 |  |  | $ 499.6 |  |  |  |
Unamortized discount | 0.4 |  |  | 0.4 |  |  |  |
4.350% Senior Notes due June 2029 | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Total debt, Approximate Fair Value | $ 608.4 |  |  | $ 562.9 |  |  |  |
2.800% Senior Notes due February 2030 |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Stated interest rate (as a percent) | 2.80% |  |  | 2.80% | 2.80% | 2.80% |  |
Debt carrying amount, net of unamortized discount or premium before deferred debt issuance costs | $ 899.4 |  |  | $ 899.3 |  |  |  |
Unamortized discount | 0.6 |  |  | 0.7 |  |  |  |
2.800% Senior Notes due February 2030 | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Total debt, Approximate Fair Value | 987.8 |  |  | 897.3 |  |  |  |
Other Debt [Member] |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Debt carrying amount, net of unamortized discount or premium before deferred debt issuance costs | 6.7 |  |  | 5.5 |  |  |  |
Other Debt [Member] | Quoted Prices in Active Markets for Identical Assets (Level 1) |  |  |  |  |  |  |  |
Debt |  |  |  |  |  |  |  |
Total debt, Approximate Fair Value | $ 6.7 |  |  | $ 5.5 |  |  |  |

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