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Land, Buildings, Equipment and Software, Net (Tables) | 12 Months Ended
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Dec. 31, 2017
Land, Buildings, Equipment and Software, Net [Abstract] |
Land, buildings and equipment, net | Land, buildings and equipment, net were as follows:
|  | Estimated Useful Lives |  | December 31,
(in millions except as noted) |  | (Years) |  | 2018 |  | 2017
Land |  |  |  | $ | 2 |  |  | $ | 3 |
Building and building equipment |  | 25 to 50 |  | 7 |  |  | 17 |
Leasehold improvements |  | Varies |  | 246 |  |  | 247 |
Office furniture and equipment |  | 3 to 15 |  | 901 |  |  | 784 |
Other |  | 4 to 20 |  | 2 |  |  | 1 |
Construction in progress |  |  |  | 64 |  |  | 24 |
Subtotal |  |  |  | 1,222 |  |  | 1,076 |
Accumulated depreciation |  |  |  | (894 | ) |  | (819 | )
Land, Buildings and Equipment, Net |  |  |  | $ | 328 |  |  | $ | 257 |
Land, Buildings and Equipment Depreciation Expense | Depreciation expense and operating lease rent expense were as follows:
|  | Year Ended December 31,
(in millions) |  | 2018 |  | 2017 |  | 2016
Depreciation expense |  | $ | 121 |  |  | $ | 125 |  |  | $ | 130 |
Operating lease rent expense |  | $ | 208 |  |  | $ | 267 |  |  | $ | 299 |
Schedule of Future Minimum Operating Lease Non-cancelable Payments | Future minimum operating lease commitments that have initial or remaining non-cancelable lease terms in excess of one year at December 31, 2018 were as follows (in millions):
2019 |  | 2020 |  | 2021 |  | 2022 |  | 2023 |  | Thereafter
$ | 153 |  |  | $ | 113 |  |  | $ | 78 |  |  | $ | 53 |  |  | $ | 33 |  |  | $ | 76 |
Additions to Internal Use and Product Software | Additions to Internal Use and Product Software as well as year-end balances for these assets were as follows:
(in millions) |  | Year Ended December 31,
Additions to: |  | 2018 |  | 2017 |  | 2016
Internal use software |  | $ | 47 |  |  | $ | 36 |  |  | $ | 39 |
Product software |  | 8 |  |  | 10 |  |  | 10 |
Capitalized Costs, Internal Use and Product Software |
(in millions) |  | December 31,
Capitalized Costs, Net |  | 2018 |  | 2017
Internal use software(1) |  | $ | 123 |  |  | $ | 106 |
Product software(1) |  | 18 |  |  | 22 |

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- Definition Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02(13)) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 + Details
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- Definition Tabular disclosure of future minimum payments required in the aggregate and for each of the five succeeding fiscal years for operating leases having initial or remaining noncancelable lease terms in excess of one year and the total minimum rentals to be received in the future under noncancelable subleases as of the balance sheet date. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 840 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=77902758&loc=d3e41502-112717 + Details
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