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v3.20.1

Financing (Key Terms of Euronotes Offering) (Details) - Senior notes - EUR (€) € in Millions | Apr. 08, 2020 | Mar. 30, 2020 | Apr. 03, 2020 | Dec. 31, 2019
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1.7% senior notes due 2024 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate of debt instrument |  | 1.70% | 1.70% |
Debt Instrument, Redemption Price, Percentage |  | 99.931% |  |
Aggregate principal amount |  | € 750.0 | € 750.0 | € 0.0
1.7% senior notes due 2024 | Subsequent event |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate of debt instrument | 1.70% |  |  |
Debt Instrument, Redemption Price, Percentage | 100.298% |  |  |
Aggregate principal amount | € 150.0 |  |  |
2.1% senior notes due 2026 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate of debt instrument |  | 2.10% | 2.10% |
Debt Instrument, Redemption Price, Percentage |  | 99.717% |  |
Aggregate principal amount |  | € 500.0 | € 500.0 | 0.0
2.1% senior notes due 2026 | Subsequent event |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate of debt instrument | 2.10% |  |  |
Debt Instrument, Redemption Price, Percentage | 100.842% |  |  |
Aggregate principal amount | € 300.0 |  |  |
2.5% senior notes due 2030 |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate of debt instrument |  | 2.50% | 2.50% |
Debt Instrument, Redemption Price, Percentage |  | 99.642% |  |
Aggregate principal amount |  | € 500.0 | € 500.0 | € 0.0
2.5% senior notes due 2030 | Subsequent event |  |  |  |
Debt Instrument [Line Items] |  |  |  |
Interest rate of debt instrument | 2.50% |  |  |
Debt Instrument, Redemption Price, Percentage | 102.166% |  |  |
Aggregate principal amount | € 300.0 |  |  |

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