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Property, Plant, and Capitalized Software (Notes) | 12 Months Ended
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Dec. 31, 2020
Property, Plant and Equipment [Line Items] |
Property, Plant and Equipment Disclosure [Text Block] | Property, Equipment and Capitalized Software A summary of property, equipment and capitalized software is as follows:
(in millions) |  | December 31, 2020 |  | December 31, 2019
Land and improvements |  | $ | 533 |  |  | $ | 589 |
Buildings and improvements |  | 4,759 |  |  | 4,705 |
Computer equipment |  | 1,767 |  |  | 2,015 |
Furniture and fixtures |  | 1,787 |  |  | 1,752 |
Less accumulated depreciation |  | (3,364) |  |  | (3,328) |
Property and equipment, net |  | 5,482 |  |  | 5,733 |
Capitalized software |  | 5,010 |  |  | 4,638 |
Less accumulated amortization |  | (1,866) |  |  | (1,667) |
Capitalized software, net |  | 3,144 |  |  | 2,971 |
Total property, equipment and capitalized software, net |  | $ | 8,626 |  |  | $ | 8,704 |
Depreciation expense for property and equipment for the years ended December 31, 2020, 2019 and 2018 was $997 million, $995 million and $924 million, respectively. Amortization expense for capitalized software for the years ended December 31, 2020, 2019 and 2018 was $814 million, $721 million and $606 million, respectively.

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- Definition The entire disclosure for long-lived, physical asset used in normal conduct of business and not intended for resale. Includes, but is not limited to, work of art, historical treasure, and similar asset classified as collections. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 6 -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99893-112916 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -URI http://asc.fasb.org/topic&trid=2155823 Reference 3: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 7 -URI http://asc.fasb.org/extlink&oid=120429125&loc=SL120174063-112916 Reference 4: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 958 -SubTopic 360 -Section 50 -Paragraph 1 -Subparagraph (d) -URI http://asc.fasb.org/extlink&oid=120429125&loc=d3e99779-112916 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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