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Fair Value of Financial Instruments (Schedule of Financial Assets and Liabilities Measured at Fair Value on Recurring Basis) (Details) - USD ($) $ in Millions | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Debt Securities [Abstract] |  |
Financial investments | $ 225 | $ 208
Fair Value, Measurements, Recurring |  |
Debt Securities [Abstract] |  |
Financial investments | 225 | 208
Fair Value, Measurements, Recurring | European government debt securities |  |
Debt Securities [Abstract] |  |
Financial investments | 141 | 144
Fair Value, Measurements, Recurring | Corporate debt securities |  |
Debt Securities [Abstract] |  |
Financial investments | 29 | 20
Fair Value, Measurements, Recurring | State owned enterprises and municipal securities |  |
Debt Securities [Abstract] |  |
Financial investments | 27 | 11
Fair Value, Measurements, Recurring | Swedish mortgage bonds |  |
Debt Securities [Abstract] |  |
Financial investments | 19 | 21
Fair Value, Measurements, Recurring | Time deposits |  |
Debt Securities [Abstract] |  |
Financial investments | 0 | 12
Fair Value, Measurements, Recurring | Commercial paper |  |
Debt Securities [Abstract] |  |
Financial investments | 9 |
Fair Value, Measurements, Recurring | Level 1 |  |
Debt Securities [Abstract] |  |
Financial investments | 141 | 144
Fair Value, Measurements, Recurring | Level 1 | European government debt securities |  |
Debt Securities [Abstract] |  |
Financial investments | 141 | 144
Fair Value, Measurements, Recurring | Level 1 | Corporate debt securities |  |
Debt Securities [Abstract] |  |
Financial investments | 0 | 0
Fair Value, Measurements, Recurring | Level 1 | State owned enterprises and municipal securities |  |
Debt Securities [Abstract] |  |
Financial investments | 0 | 0
Fair Value, Measurements, Recurring | Level 1 | Swedish mortgage bonds |  |
Debt Securities [Abstract] |  |
Financial investments | 0 | 0
Fair Value, Measurements, Recurring | Level 1 | Time deposits |  |
Debt Securities [Abstract] |  |
Financial investments | 0 | 0
Fair Value, Measurements, Recurring | Level 1 | Commercial paper |  |
Debt Securities [Abstract] |  |
Financial investments | 0 |
Fair Value, Measurements, Recurring | Level 2 |  |
Debt Securities [Abstract] |  |
Financial investments | 84 | 64
Fair Value, Measurements, Recurring | Level 2 | European government debt securities |  |
Debt Securities [Abstract] |  |
Financial investments | 0 | 0
Fair Value, Measurements, Recurring | Level 2 | Corporate debt securities |  |
Debt Securities [Abstract] |  |
Financial investments | 29 | 20
Fair Value, Measurements, Recurring | Level 2 | State owned enterprises and municipal securities |  |
Debt Securities [Abstract] |  |
Financial investments | 27 | 11
Fair Value, Measurements, Recurring | Level 2 | Swedish mortgage bonds |  |
Debt Securities [Abstract] |  |
Financial investments | 19 | 21
Fair Value, Measurements, Recurring | Level 2 | Time deposits |  |
Debt Securities [Abstract] |  |
Financial investments | 0 | 12
Fair Value, Measurements, Recurring | Level 2 | Commercial paper |  |
Debt Securities [Abstract] |  |
Financial investments | 9 |
Fair Value, Measurements, Recurring | Level 3 |  |
Debt Securities [Abstract] |  |
Financial investments | 0 | 0
Fair Value, Measurements, Recurring | Level 3 | European government debt securities |  |
Debt Securities [Abstract] |  |
Financial investments | 0 | 0
Fair Value, Measurements, Recurring | Level 3 | Corporate debt securities |  |
Debt Securities [Abstract] |  |
Financial investments | 0 | 0
Fair Value, Measurements, Recurring | Level 3 | State owned enterprises and municipal securities |  |
Debt Securities [Abstract] |  |
Financial investments | 0 | 0
Fair Value, Measurements, Recurring | Level 3 | Swedish mortgage bonds |  |
Debt Securities [Abstract] |  |
Financial investments | 0 | 0
Fair Value, Measurements, Recurring | Level 3 | Time deposits |  |
Debt Securities [Abstract] |  |
Financial investments | 0 | $ 0
Fair Value, Measurements, Recurring | Level 3 | Commercial paper |  |
Debt Securities [Abstract] |  |
Financial investments | $ 0 |

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