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Equity (Details) - $ / shares | 3 Months Ended | 6 Months Ended |  |
--- | --- | --- | --- | ---
Jun. 30, 2018 | Jun. 30, 2017 | Jun. 30, 2018 | Dec. 31, 2017 | Jul. 03, 2017
Class of Stock [Line Items] |  |  |  |  |
Preferred stock authorized (in shares) | 50,000,000 |  | 50,000,000 |  |
Common stock par value (in dollars per share) | $ 0.0001 |  | $ 0.0001 |  |
Common Class A |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Common stock authorized (in shares) | 2,000,000,000 |  | 2,000,000,000 |  |
Common stock par value (in dollars per share) | $ 0.0001 |  | $ 0.0001 |  |
Common stock outstanding (in shares) | 412,000,000 |  | 412,000,000 |  |
Common Class B |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Common stock authorized (in shares) | 1,250,000,000.00 |  | 1,250,000,000.00 |  |
Common stock par value (in dollars per share) | $ 0.0001 |  | $ 0.0001 |  |
Common stock outstanding (in shares) | 688,000,000 |  | 688,000,000 |  |
GE Transaction Agreement | General Electric Company |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Approximate interest to be acquired | 62.50% |  | 62.50% |  | 62.50%
GE Transaction Agreement | General Electric Company | Common Class B |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Approximate interest to be acquired |  |  |  | 62.50% |
Cash Dividend | Common Class A |  |  |  |  |
Class of Stock [Line Items] |  |  |  |  |
Cash dividends per share (in dollars per share) | $ 0.18 |  | $ 0.36 |  |

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