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Supplemental Cash Flow Information (Tables) | 6 Months Ended
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Jun. 30, 2019
Supplemental Cash Flow Information [Abstract] |
Schedule of supplemental cash flow information from collateralized securities received | The accompanying cash flows are included in cash flows from operating activities in the Condensed Consolidated Statements of Cash Flows along with the activities resulting from management of the proceeds, as follows:
($ in millions) |  | Six months ended June 30,
| 2019 |  | 2018
Net change in proceeds managed |  |  |  |  |  |
Net change in fixed income securities |  | $ | 80 |  |  | $ | 122 |
Net change in short-term investments |  | (493 | ) |  | (663 | )
Operating cash flow used |  | $ | (413 | ) |  | $ | (541 | )
Net change in liabilities |  |  |  |
Liabilities for collateral, beginning of period |  | $ | (1,458 | ) |  | $ | (1,124 | )
Liabilities for collateral, end of period |  | (1,871 | ) |  | (1,665 | )
Operating cash flow provided |  | $ | 413 |  |  | $ | 541 |

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- Definition This element may be used to capture the complete disclosure pertaining to supplemental cash flow information about collateral received. + References No definition available. + Details
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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
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