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v3.20.1

New Accounting Guidance - Narrative (Details) - USD ($) $ in Millions | Mar. 31, 2020 | Dec. 31, 2019 | Jan. 01, 2019
--- | --- | --- | ---
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Operating lease, liability | $ 2,232 |  |
Operating lease, right-of-use asset | $ 1,885 | $ 1,921 |
Accounting Standards Update 2016-02 |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Operating lease, liability |  |  | $ 1,900
Operating lease, right-of-use asset |  |  | 1,700
Accounting Standards Update 2016-02 | Restatement Adjustment |  |  |
New Accounting Pronouncements or Change in Accounting Principle [Line Items] |  |  |
Other liabilities |  |  | $ 200

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