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Supplemental Cash Flow Information (Tables) | 12 Months Ended
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Dec. 31, 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 Consolidated Statements of Cash Flows along with the activities resulting from management of the proceeds as follows:
|  | For the years ended December 31,
($ in millions) |  | 2019 |  | 2018 |  | 2017
Net change in proceeds managed |  |  |  |  |  |
Net change in fixed income securities |  | $ | 80 |  |  | $ | 234 |  |  | $ | 259 |
Net change in short-term investments |  | (451 | ) |  | (568 | ) |  | (255 | )
Operating cash flow (used) provided |  | (371 | ) |  | (334 | ) |  | 4 |
Net change in cash |  | — |  |  | — |  |  | 1 |
Net change in proceeds managed |  | $ | (371 | ) |  | $ | (334 | ) |  | $ | 5 |
Net change in liabilities |  |  |  |  |  |
Liabilities for collateral, beginning of year |  | $ | (1,458 | ) |  | $ | (1,124 | ) |  | $ | (1,129 | )
Liabilities for collateral, end of year |  | (1,829 | ) |  | (1,458 | ) |  | (1,124 | )
Operating cash flow provided (used) |  | $ | 371 |  |  | $ | 334 |  |  | $ | (5 | )

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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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Period Type: | duration