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Business Segments - Segment information (Details) - USD ($) $ in Millions | 12 Months Ended
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Dec. 31, 2018 | Dec. 31, 2017 | Dec. 31, 2016
Business Segment Information |  |  |
Net sales | $ 32,765 | $ 31,657 | $ 30,109
Operating Income | 7,207 | 7,692 | 7,027
Assets | 36,500 | 37,987 | 32,906
Depreciation and amortization | 1,488 | 1,544 | 1,474
Capital expenditures | 1,577 | 1,373 | 1,420
Business Segments. | Industrial |  |  |
Business Segment Information |  |  |
Net sales | 12,267 | 11,866 | 11,217
Operating Income | 2,737 | 2,490 | 2,528
Assets | 9,855 | 9,895 | 9,140
Depreciation and amortization | 376 | 432 | 407
Capital expenditures | 454 | 381 | 360
Business Segments. | Safety And Graphics |  |  |
Business Segment Information |  |  |
Net sales | 6,827 | 6,235 | 5,948
Operating Income | 1,720 | 2,066 | 1,403
Assets | 9,657 | 9,874 | 7,626
Depreciation and amortization | 300 | 275 | 277
Capital expenditures | 210 | 184 | 228
Business Segments. | Health Care |  |  |
Business Segment Information |  |  |
Net sales | 6,021 | 5,853 | 5,606
Operating Income | 1,799 | 1,764 | 1,731
Assets | 4,687 | 4,757 | 4,293
Depreciation and amortization | 162 | 175 | 175
Capital expenditures | 180 | 137 | 136
Business Segments. | Electronics And Energy |  |  |
Business Segment Information |  |  |
Net sales | 5,472 | 5,501 | 4,926
Operating Income | 2,055 | 1,377 | 1,145
Assets | 3,993 | 4,291 | 4,335
Depreciation and amortization | 134 | 240 | 223
Capital expenditures | 115 | 152 | 187
Business Segments. | Consumer |  |  |
Business Segment Information |  |  |
Net sales | 4,796 | 4,731 | 4,578
Operating Income | 1,027 | 1,004 | 1,054
Assets | 2,757 | 2,706 | 2,497
Depreciation and amortization | 91 | 112 | 114
Capital expenditures | 115 | 109 | 109
Corporate and Unallocated |  |  |
Business Segment Information |  |  |
Net sales | 50 | 3 | 6
Operating Income | (1,465) | (395) | (321)
Assets | 5,551 | 6,464 | 5,015
Depreciation and amortization | 425 | 310 | 278
Capital expenditures | 503 | 410 | 400
Elimination of Dual Credit |  |  |
Business Segment Information |  |  |
Net sales | (2,668) | (2,532) | (2,172)
Operating Income | $ (666) | $ (614) | $ (513)

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