Using the 3M annual report document the ASC topics for footnotes 2. The documentation must include the ASC topic that relate to each part of each footnote along with and explanation as to why that is the correct topic.

Footnote 2. Revenue The Company adopted ASU No. 2014-09 and related standards (collectively, ASC 606, Revenue from Contracts with Customers), on January 1, 2018 using the modified retrospective method of adoption. Prior periods have not been restated. Due to the cumulative net impact of adopting ASC 606, the January 1, 2018 balance of retained earnings was increased by less than $2 million, primarily relating to the accelerated recognition for software installation service and training revenue. This cumulative impact reflects retrospective application of ASC 606 only to contracts that were not completed as of January 1, 2018. Further, the Company applied the practical expedient permitting the effect of all contract modifications that occurred before January 1, 2018 to be aggregated in the transition accounting. The impact of applying ASC 606 as compared with previous guidance applied to revenues and costs was not material for the year ended December 31, 2018. Contract Balances: Deferred revenue primarily relates to revenue that is recognized over time for one-year software license contracts. Refer to Note 7 for deferred revenue balances at December 31, 2018 and 2019. Approximately $600 million of the December 31, 2018 balance was recognized as revenue during the year ended December 31, 2019, while approximately $500 million of the December 31, 2017 balance was recognized as revenue during the year ended December 31, 2018. 70 Disaggregated revenue information: The Company views the following disaggregated disclosures as useful to understanding the composition of revenue recognized during the respective reporting periods: Year ended December 31, Net Sales (Millions) 2019 2018 2017 Abrasives $ 1,414 $ 1,533 $ 1,498 Automotive Aftermarket 1,243 1,374 1,388 Closure and Masking Systems 1,111 1,224 1,259 Communication Markets 175 387 Electrical Markets 1,200 1,243 1,196 Industrial Adhesives and Tapes 2,737 2,880 2,773 Personal Safety 3,508 3,606 2,960 Roofing Granules 366 353 372 Other Safety and Industrial 28 106 113 Total Safety and Industrial Business Segment $ 11,607 $ 12,494 $ 11,946 Advanced Materials $ 1,246 $ 1,236 $ 1,123 Automotive and Aerospace 1,943 2,109 2,047 Commercial Solutions 1,760 1,829 1,743 Electronics 3,710 3,965 3,842 Transportation Safety 949 957 1,103 Other Transportation and Electronics (6) 10 3 Total Transportation and Electronics Business Segment $ 9,602 $ 10,106 $ 9,861 Drug Delivery $ 406 $ 444 $ 486 Food Safety 341 328 303 Health Information Systems 1,177 837 791 Medical Solutions 3,406 3,036 2,934 Oral Care 1,321 1,353 1,322 Separation and Purification Sciences 790 822 797 Other Health Care (10) 6 2 Total Health Care Business Group $ 7,431 $ 6,826 $ 6,635 Consumer Health Care $ 383 $ 391 $ 425 Home Care 991 1,012 1,028 Home Improvement 2,305 2,233 2,118 Stationery and Office 1,373 1,396 1,386 Other Consumer 37 54 49 Total Consumer Business Group $ 5,089 $ 5,086 $ 5,006 Corporate and Unallocated $ 110 $ 50 $ 2 Elimination of Dual Credit (1,703) (1,797) (1,793) Total Company $ 32,136 $ 32,765 $ 31,657 71 Year ended December 31, 2019 Net Sales (Millions) United States Asia Pacific Europe, Middle East and Africa Latin America and Canada Other Unallocated Worldwide Safety and Industrial $ 4,643 $ 2,877 $ 2,672 $ 1,419 $ (4) $ 11,607 Transportation and Electronics 2,304 5,228 1,472 601 (3) 9,602 Health Care 3,597 1,490 1,743 603 (2) 7,431 Consumer 3,119 984 545 442 (1) 5,089 Corporate and Unallocated 100 1 9 110Elimination of Dual Credit (604) (783) (207) (109) (1,703) Total Company $ 13,159 $ 9,796 $ 6,226 $ 2,965 $ (10) $ 32,136 Year ended December 31, 2018 Net Sales (Millions) United States Asia Pacific Europe, Middle East and Africa Latin America and Canada Other Unallocated Worldwide Safety and Industrial $ 4,921 $ 3,099 $ 3,001 $ 1,476 $ (3) $ 12,494 Transportation and Electronics 2,406 5,514 1,578 610 (2) 10,106 Health Care 3,039 1,458 1,733 596 6,826 Consumer 3,045 1,021 574 447 (1) 5,086 Corporate and Unallocated 48 3 (1) 50 Elimination of Dual Credit (619) (838) (232) (108) (1,797) Total Company $ 12,840 $ 10,254 $ 6,654 $ 3,024 $ (7) $ 32,765 Year ended December 31, 2017 Net Sales (Millions) United States Asia Pacific Europe, Middle East and Africa Latin America and Canada Other Unallocated Worldwide Safety and Industrial $ 4,605 $ 2,981 $ 2,869 $ 1,497 $ (6) $ 11,946 Transportation and Electronics 2,372 5,328 1,550 615 (4) 9,861 Health Care 3,037 1,346 1,667 587 (2) 6,635 Consumer 2,943 1,029 585 450 (1) 5,006 Corporate and Unallocated 6 (1) 1 (4) 2 Elimination of Dual Credit (591) (874) (216) (112) (1,793) Total Company $ 12,372 $ 9,809 $ 6,456 $ 3,033 $ (13) $ 31,657 - footnote 2