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Business Combinations - Additional Information (Details) € in Millions, £ in Millions, $ in Millions | 12 Months Ended |  |  |  |  |
--- | --- | --- | --- | --- | --- | ---
May 31, 2016 USD ($) | May 31, 2018 USD ($) Country | Mar. 23, 2018 USD ($) | Mar. 23, 2018 GBP (£) | Oct. 13, 2017 USD ($) | May 31, 2017 USD ($) | May 25, 2016 USD ($) | May 25, 2016 EUR (€)
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Goodwill | $ 6,747 | $ 6,973 |  |  |  | $ 7,154 |  |
TNT acquisition related costs | 115 |  |  |  |  |  |  |
TNT restructuring, impairments, litigation matters and pension adjustments | 40 |  |  |  |  |  |  |
TNT acquisition [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Acquisition price |  |  |  |  |  | 4,894 | $ 4,900 | € 4,400
Cash acquired |  |  |  |  |  |  | $ 280 | € 250
Number of country for collection, transports and delivery of documents, parcels and freight | Country |  | 200 |  |  |  |  |  |
Goodwill |  |  |  |  |  | $ 3,452 |  |
Net increase in goodwill | $ 488 |  |  |  |  |  |  |
P2P Mailing Limited [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Acquisition price |  |  | $ 135 | £ 92 |  |  |  |
Northwest Research, Inc. [Member] |  |  |  |  |  |  |  |
Business Acquisition [Line Items] |  |  |  |  |  |  |  |
Acquisition price |  |  |  |  | $ 50 |  |  |

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- Definition Amount of currency on hand as well as demand deposits with banks or financial institutions, acquired at the acquisition date. Includes other kinds of accounts that have the general characteristics of demand deposits. Also includes short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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