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Financial Instruments - Narrative (Details) € in Billions | 9 Months Ended |  |
--- | --- | --- | ---
Sep. 30, 2020 USD ($) | Sep. 30, 2020 EUR (€) | Sep. 30, 2020 USD ($) | Dec. 31, 2019 USD ($)
Derivative [Line Items] |  |  |  |
Notional value |  |  | $ 10,411,000,000 | $ 12,112,000,000
Net Investment Hedging |  |  |  |
Derivative [Line Items] |  |  |  |
Exchange rate movements reducing long-term debt | $ 206,000,000 |  |  |
Derivatives Designated as Hedging Instruments: |  |  |  |
Derivative [Line Items] |  |  |  |
Notional value |  |  | 2,318,000,000 | 2,399,000,000
Interest Rate Swap | Derivatives Designated as Hedging Instruments: |  |  |  |
Derivative [Line Items] |  |  |  |
Notional value |  |  | 1,839,000,000 | 1,908,000,000
Interest Rate Swap | Derivatives Designated as Hedging Instruments: | Fair Value Hedging |  |  |  |
Derivative [Line Items] |  |  |  |
Notional value |  |  | 1,839,000,000 | 1,908,000,000
Line of Credit |  |  |  |
Derivative [Line Items] |  |  |  |
Intercompany Euro-denominated credit facility loan |  | € 2.4 | 2,900,000,000 |
Line of Credit | Net Investment Hedging |  |  |  |
Derivative [Line Items] |  |  |  |
Exchange rate movements reducing long-term debt | $ 244,000,000 |  |  |
3.00% Notes due 2021 |  |  |  |
Derivative [Line Items] |  |  |  |
Face amount |  |  | $ 500,000,000 |
Interest rate |  | 3.00% | 3.00% |
2.20% Notes due 2022 |  |  |  |
Derivative [Line Items] |  |  |  |
Face amount |  |  |  | $ 500,000,000
Interest rate |  | 2.20% | 2.20% | 2.20%

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