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v3.19.1

Balance Sheet Components (Details) |  | 3 Months Ended |
--- | --- | --- | ---
Apr. 12, 2019 USD ($) | Mar. 31, 2019 USD ($) | Mar. 31, 2018 USD ($) | Dec. 31, 2018 USD ($)
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |
Letters of Credit Outstanding, Amount |  | $ 0 |  |
Finite-Lived Intangible Assets, Accumulated Amortization |  | 318,000,000 |  | $ 302,000,000
Amortization of Intangible Assets |  | $ 16,000,000 | $ 13,000,000 |
Line of Credit Facility, Maximum Borrowing Capacity |  |  |  | 500,000,000
Debt Instrument, Covenant Description |  | 0.65 |  |
Ratio of Indebtedness to Net Capital |  | 0.493 |  |
Short-term debt |  | $ 0 |  |
Commercial Paper |  | 0 |  |
Line of Credit Facility, Remaining Borrowing Capacity |  | 500,000,000 |  |
Line of Credit Facility, Current Borrowing Capacity |  | 220,000,000 |  |
Letters of credit issued |  | 83,000,000 |  |
Authorized Short-Term Debt |  | 900,000,000 |  |
Long-term Debt, Current Maturities |  | $ 300,000,000 |  | $ 300,000,000
Subsequent Event [Member] |  |  |  |
SEC Schedule, 12-09, Valuation and Qualifying Accounts Disclosure [Line Items] |  |  |  |
Proceeds from Issuance of Long-term Debt | $ 200,000,000 |  |  |

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