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Restructuring Costs (Restructuring Activities) (Details) - USD ($) $ in Millions | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2019 | Dec. 31, 2018
Restructuring Reserve [Roll Forward] |  |
Liability at beginning of period | $ 112 | $ 65
Amounts Accrued | 56 | 161
Cash Paid | (108) | (114)
Other | (10) | 0
Liability at end of period | 50 | 112
Severance |  |
Restructuring Reserve [Roll Forward] |  |
Liability at beginning of period | 73 | 15
Amounts Accrued | 44 | 137
Cash Paid | (95) | (77)
Other | (4) | (2)
Liability at end of period | 18 | 73
Future rent under non-cancelable leases and other costs |  |
Restructuring Reserve [Roll Forward] |  |
Liability at beginning of period | 39 | 50
Amounts Accrued | 12 | 24
Cash Paid | (13) | (37)
Other | (6) | 2
Liability at end of period | 32 | 39
Jardine Lloyd Thompson Group plc |  |
Restructuring Reserve [Roll Forward] |  |
Liability at beginning of period | 0 |
Amounts Accrued | 192 |
Cash Paid | (143) |
Non-cash charges | (7) |
Liability at end of period | 42 | 0
Jardine Lloyd Thompson Group plc | Severance |  |
Restructuring Reserve [Roll Forward] |  |
Liability at beginning of period | 0 |
Amounts Accrued | 92 |
Cash Paid | (59) |
Non-cash charges | 0 |
Liability at end of period | 33 | 0
Jardine Lloyd Thompson Group plc | Real estate related costs |  |
Restructuring Reserve [Roll Forward] |  |
Liability at beginning of period | 0 |
Amounts Accrued | 21 |
Cash Paid | (5) |
Non-cash charges | (7) |
Liability at end of period | 9 | 0
Jardine Lloyd Thompson Group plc | Information Technology |  |
Restructuring Reserve [Roll Forward] |  |
Liability at beginning of period | 0 |
Amounts Accrued | 9 |
Cash Paid | (9) |
Non-cash charges | 0 |
Liability at end of period | 0 | 0
Jardine Lloyd Thompson Group plc | Consulting and other outside services |  |
Restructuring Reserve [Roll Forward] |  |
Liability at beginning of period | 0 |
Amounts Accrued | 70 |
Cash Paid | (70) |
Non-cash charges | 0 |
Liability at end of period | $ 0 | $ 0

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- Definition Amount of cash payments made as the result of exit or disposal activities. Excludes payments associated with a discontinued operation or an asset retirement obligation. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 420 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b)(2) -URI http://asc.fasb.org/extlink&oid=6394359&loc=d3e17939-110869 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 17 -Subparagraph (f) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3367-108585 + Details
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