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Segment Financial Data (By Geographic Region) (Details) - USD ($) $ in Millions | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2019 | Sep. 30, 2019 | Jun. 30, 2019 | Mar. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Jun. 30, 2018 | Mar. 31, 2018 | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Revenues | $ 11,694 | $ 11,373 | $ 11,329 | $ 10,953 | $ 10,121 | $ 8,412 | $ 8,333 | $ 7,836 | $ 45,349 | $ 34,701 | $ 29,713
External Net Sales by Geography |  |  |  |  |  |  |  |  | 45,349 | 34,701 | 29,713
United States Export Sales |  |  |  |  |  |  |  |  | $ 16,784 | $ 13,538 | $ 10,398
Operating Income (Loss) |  |  |  |  |  |  |  |  | $ 4,914 | $ 2,877 | $ 2,989
Long-Lived Assets by Geography |  |  |  |  |  |  |  |  | 10,322 | 9,906 | 7,807
Europe [Member] |  |  |  |  |  |  |  |  |  |  |
External Net Sales by Geography |  |  |  |  |  |  |  |  | 4,419 | 3,092 | 2,747
United States Export Sales |  |  |  |  |  |  |  |  | $ 7,078 | $ 6,217 | $ 5,197
Operating Income (Loss) |  |  |  |  |  |  |  |  | $ 1,480 | $ 1,027 | $ 826
Long-Lived Assets by Geography |  |  |  |  |  |  |  |  | 1,268 | 1,272 | 1,147
Asia Pacific [Member] |  |  |  |  |  |  |  |  |  |  |
External Net Sales by Geography |  |  |  |  |  |  |  |  | 1,989 | 1,645 | 1,779
United States Export Sales |  |  |  |  |  |  |  |  | $ 6,411 | $ 5,355 | $ 3,526
Operating Income (Loss) |  |  |  |  |  |  |  |  | $ 444 | $ 365 | $ 351
Long-Lived Assets by Geography |  |  |  |  |  |  |  |  | 917 | 905 | 685
Other Geographic Regions [Member] |  |  |  |  |  |  |  |  |  |  |
External Net Sales by Geography |  |  |  |  |  |  |  |  | 5,387 | 4,648 | 4,350
United States Export Sales |  |  |  |  |  |  |  |  | $ 3,295 | $ 1,966 | $ 1,675
Operating Income (Loss) |  |  |  |  |  |  |  |  | $ 557 | $ 390 | $ 711
Long-Lived Assets by Geography |  |  |  |  |  |  |  |  | 1,089 | 1,064 | 1,082
UNITED STATES |  |  |  |  |  |  |  |  |  |  |
External Net Sales by Geography |  |  |  |  |  |  |  |  | 35,125 | 26,646 | 21,975
Operating Income (Loss) |  |  |  |  |  |  |  |  | $ 3,287 | $ 1,790 | $ 1,603
Long-Lived Assets by Geography |  |  |  |  |  |  |  |  | 6,507 | 6,165 | 4,424
UNITED STATES |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 35,125 | $ 26,646 |
Other [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 5,387 | 4,648 |
Asia Pacific [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 1,989 | 1,645 |
Europe [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 4,419 | $ 3,092 |
Eliminations and other |  |  |  |  |  |  |  |  |  |  |
External Net Sales by Geography |  |  |  |  |  |  |  |  | (1,571) | (1,330) | (1,138)
Operating Income (Loss) |  |  |  |  |  |  |  |  | $ (854) | $ (695) | $ (502)
Long-Lived Assets by Geography |  |  |  |  |  |  |  |  | 541 | 500 | 469
Total Segments [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | $ 46,920 | $ 36,031 | $ 30,851
Operating Income (Loss) |  |  |  |  |  |  |  |  | 5,768 | 3,572 | 3,491
Collins Aerospace Systems [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 26,028 | 16,634 | 14,691
Operating Income (Loss) |  |  |  |  |  |  |  |  | 4,100 | 2,303 | 2,191
Collins Aerospace Systems [Member] | UNITED STATES |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 18,977 | 11,794 |
Collins Aerospace Systems [Member] | Other [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 2,305 | 1,974 |
Collins Aerospace Systems [Member] | Asia Pacific [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 825 | 368 |
Collins Aerospace Systems [Member] | Europe [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 3,921 | 2,498 |
Pratt and Whitney [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 20,892 | 19,397 | 16,160
Operating Income (Loss) |  |  |  |  |  |  |  |  | 1,668 | 1,269 | 1,300
Pratt and Whitney [Member] | UNITED STATES |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 16,148 | 14,852 |
Pratt and Whitney [Member] | Other [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 3,082 | 2,674 |
Pratt and Whitney [Member] | Asia Pacific [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 1,164 | 1,277 |
Pratt and Whitney [Member] | Europe [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | 498 | 594 |
Eliminations and other [Member] |  |  |  |  |  |  |  |  |  |  |
Revenues |  |  |  |  |  |  |  |  | (1,571) | (1,330) | (1,138)
Operating Income (Loss) |  |  |  |  |  |  |  |  | $ (339) | $ (220) | $ (63)

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