XML 29 R34.htm IDEA: XBRL DOCUMENT
v3.19.3.a.u2

SPECIAL ITEMS (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2019
Unusual or Infrequent Items, or Both [Abstract] |
Merger-related Costs [Table Text Block] | The following breaks down merger-related costs incurred in 2019, 2018 and 2017 (in millions):
| 2019 |  | 2018 |  | 2017
Consulting and professional services | $ | 18 |  |  | $ | 45 |  |  | $ | 52 |
Employee-related costs(a) | 15 |  |  | 13 |  |  | 41 |
Legal and accounting fees | 1 |  |  | 1 |  |  | 3 |
Other merger-related costs(b) | 10 |  |  | 28 |  |  | 20 |
Total Merger-related Costs | $ | 44 |  |  | $ | 87 |  |  | $ | 116 |
(a)Employee-related costs consist primarily of vacation balance true-ups, severance, retention bonuses, and training and skill development. (b)Other merger-related costs consist primarily of costs for marketing and advertising, IT, employee appreciation and company sponsored events, moving expenses, supplies, and other immaterial expenses.

X
- Definition [Table Text Block] for Merger-related Costs [Table] + References No definition available. + Details
Name: | alk_MergerrelatedCostsTableTextBlock
Namespace Prefix: | alk_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_ExtraordinaryAndUnusualItemsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration