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Financial Instruments (Narrative) (Details) ¥ in Millions, $ in Millions | 3 Months Ended | 6 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2023 USD ($) | Dec. 31, 2022 USD ($) | Dec. 31, 2024 USD ($) | Dec. 31, 2023 JPY (¥)
Derivative [Line Items] |  |  |  |  |  |
Change in Unrealized Gain (Loss) on Fair Value Hedging Instruments | $ 0 | $ 0 | $ 0 | $ 0 |  |
Proceeds from net investment hedge terminations |  |  | 28 | 0 |  |
January 2023 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Proceeds from net investment hedge terminations |  |  | 28 |  |  |
Cash Flow Hedging [Member] |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification and Tax |  | 2 | (1) | (2) |  |
Foreign Exchange Contract [Member] |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Other Comprehensive Income (Loss), Net Investment Hedge, Gain (Loss), before Reclassification and Tax | 16 | 43 | 5 | 21 |  |
Interest Income (Expense), Nonoperating, Net | 4 | 4 | 7 | 8 |  |
Cash Flow Hedging [Member] | Foreign Exchange Contract [Member] |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net | 1 |  | 2 |  |  |
Cash Flow Hedging [Member] | Foreign Exchange Contract [Member] | Subsequent Event | Forecast [Member] |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net |  |  |  |  | $ 3 |
Designated as Hedging Instrument | Fair Value Hedging | Interest Rate Swap |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative Liability, Notional Amount | 200 | 200 | 200 | 200 |  |
Designated as Hedging Instrument | Net Investment Hedging [Member] | Currency Swap [Member] | January 2023 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivatives, Hedge Discontinuances, Termination of Hedging Instrument, Notional Amount | 300 |  | 300 |  |  | ¥ 38,000
Designated as Hedging Instrument | Net Investment Hedging [Member] | Currency Swap [Member] | September 2025 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative Asset, Notional Amount | 120 |  | 120 |  |  | 18,000
Designated as Hedging Instrument | Net Investment Hedging [Member] | Currency Swap [Member] | June 2027 |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative Asset, Notional Amount | $ 120 |  | $ 120 |  |  | ¥ 18,000
Other Nonoperating Income (Expense) [Member] | Not Designated as Hedging Instrument [Member] | Foreign Exchange Contract [Member] |  |  |  |  |  |
Derivative [Line Items] |  |  |  |  |  |
Derivative Instruments Not Designated as Hedging Instruments, Gain (Loss), Net |  | $ (3) |  | $ 3 |  |

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