v3.20.4

Fair Value Measurements And Disclosure (Fair Value Leveling) (Details) - USD ($) $ in Millions | Dec. 31, 2020 | Dec. 31, 2019
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-Sale Debt Securities | $ 1,479 | $ 1,444
Interest rate swaps |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Asset Derivatives |  | 2
Cross-currency swaps |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Asset Derivatives | 1,721 | 172
Liability Derivatives | (1,814) | (3,187)
Interest rate locks |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Asset Derivatives |  | 11
Liability Derivatives |  | (95)
Foreign exchange contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Asset Derivatives | 6 | 89
Liability Derivatives | (9) |
Fixed income equities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity Securities | 236 | 229
Domestic equities | Securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity Securities | 1,010 | 844
International equities | Securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity Securities | 180 | 183
Level 1 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-Sale Debt Securities | 0 | 0
Level 1 | Interest rate swaps |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Asset Derivatives |  | 0
Level 1 | Cross-currency swaps |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Asset Derivatives | 0 | 0
Liability Derivatives | 0 | 0
Level 1 | Interest rate locks |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Asset Derivatives |  | 0
Liability Derivatives |  | 0
Level 1 | Foreign exchange contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Asset Derivatives | 0 | 0
Liability Derivatives | 0 |
Level 1 | Fixed income equities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity Securities | 236 | 229
Level 1 | Domestic equities | Securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity Securities | 1,010 | 844
Level 1 | International equities | Securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity Securities | 180 | 183
Level 2 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-Sale Debt Securities | 1,479 | 1,444
Level 2 | Interest rate swaps |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Asset Derivatives |  | 2
Level 2 | Cross-currency swaps |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Asset Derivatives | 1,721 | 172
Liability Derivatives | (1,814) | (3,187)
Level 2 | Interest rate locks |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Asset Derivatives |  | 11
Liability Derivatives |  | (95)
Level 2 | Foreign exchange contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Asset Derivatives | 6 | 89
Liability Derivatives | (9) |
Level 2 | Fixed income equities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity Securities | 0 | 0
Level 2 | Domestic equities | Securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity Securities | 0 | 0
Level 2 | International equities | Securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity Securities | 0 | 0
Level 3 |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Available-for-Sale Debt Securities | 0 | 0
Level 3 | Interest rate swaps |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Asset Derivatives |  | 0
Level 3 | Cross-currency swaps |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Asset Derivatives | 0 | 0
Liability Derivatives | 0 | 0
Level 3 | Interest rate locks |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Asset Derivatives |  | 0
Liability Derivatives |  | 0
Level 3 | Foreign exchange contracts |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Asset Derivatives | 0 | 0
Liability Derivatives | 0 |
Level 3 | Fixed income equities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity Securities | 0 | 0
Level 3 | Domestic equities | Securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity Securities | 0 | 0
Level 3 | International equities | Securities |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Equity Securities | $ 0 | $ 0

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