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Revenue Recognition - Schedule of Revenue by Distribution Method (Details) - USD ($) $ in Millions | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2020 | Sep. 30, 2019 | Sep. 30, 2020 | Sep. 30, 2019
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | $ 6,855 | $ 7,000 | $ 19,971 | $ 21,148
Net sales | 7 |  |  | 62
Americas |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 2,641 | 2,771 | 7,735 | 8,252
EMEA |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 1,622 | 1,634 | 4,703 | 4,989
APAC |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 1,484 | 1,461 | 4,115 | 4,376
Engineering |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 678 | 641 | 2,096 | 2,029
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 430 | 493 | 1,322 | 1,502
Merchant |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 1,771 | 1,809 | 5,010 | 5,282
Merchant | Americas |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 739 | 760 | 2,099 | 2,198
Merchant | EMEA |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 472 | 474 | 1,357 | 1,377
Merchant | APAC |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 526 | 523 | 1,444 | 1,571
Merchant | Engineering |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 0 | 0 | 0 | 0
Merchant | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 34 | 52 | 110 | 136
On-Site |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 1,484 | 1,515 | 4,298 | 4,675
On-Site | Americas |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 622 | 676 | 1,831 | 2,077
On-Site | EMEA |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 334 | 345 | 981 | 1,077
On-Site | APAC |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 528 | 494 | 1,486 | 1,521
On-Site | Engineering |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 0 | 0 | 0 | 0
On-Site | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 0 | 0 | 0 | 0
Packaged Gas |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 2,482 | 2,521 | 7,230 | 7,609
Packaged Gas | Americas |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 1,265 | 1,303 | 3,750 | 3,903
Packaged Gas | EMEA |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 799 | 815 | 2,329 | 2,531
Packaged Gas | APAC |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 413 | 396 | 1,135 | 1,162
Packaged Gas | Engineering |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 0 | 0 | 0 | 0
Packaged Gas | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 5 | 7 | 16 | 13
Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 1,118 | 1,155 | 3,433 | 3,582
Other | Americas |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 15 | 32 | 55 | 74
Other | EMEA |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 17 | 0 | 36 | 4
Other | APAC |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 17 | 48 | 50 | 122
Other | Engineering |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | 678 | 641 | 2,096 | 2,029
Other | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Total segment sales | $ 391 | $ 434 | $ 1,196 | $ 1,353
Revenue from Contract with Customer | Sales Channel |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Concentration risk, percentage | 100.00% | 100.00% | 100.00% | 100.00%
Revenue from Contract with Customer | Sales Channel | Merchant |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Concentration risk, percentage | 26.00% | 26.00% | 25.00% | 25.00%
Revenue from Contract with Customer | Sales Channel | On-Site |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Concentration risk, percentage | 22.00% | 22.00% | 22.00% | 22.00%
Revenue from Contract with Customer | Sales Channel | Packaged Gas |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Concentration risk, percentage | 36.00% | 36.00% | 36.00% | 36.00%
Revenue from Contract with Customer | Sales Channel | Other |  |  |  |
Disaggregation of Revenue [Line Items] |  |  |  |
Concentration risk, percentage | 16.00% | 16.00% | 17.00% | 17.00%

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