Cash includes currency on hand as well as demand deposits with banks or financial institutions. It also includes other kinds of accounts that have the general characteristics of demand deposits in that the customer may deposit additional funds at any time and effectively may withdraw funds at any time without prior notice or penalty. Cash equivalents, excluding items classified as marketable securities, include short-term, highly liquid Investments that are both readily convertible to known amounts of cash, and so near their maturity that they present minimal risk of changes in value because of changes in interest rates. Generally, only investments with original maturities of three months or less qualify under that definition. Original maturity means original maturity to the entity holding the investment. For example, both a three-month US Treasury bill and a three-year Treasury note purchased three months from maturity qualify as cash equivalents. However, a Treasury note purchased three years ago does not become a cash equivalent when its remaining maturity is three months. Short-term investments, exclusive of cash equivalents, generally consist of marketable securities intended to be sold within one year (or the normal operating cycle if longer) and may include trading securities, available-for-sale securities, or held-to-maturity securities (if maturing within one year), as applicable.

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(9))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

Name:	us-gaap_CashCashEquivalentsAndShortTermInvestments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

General (Details) £ in Millions, $ in Millions, € in Billions	Aug. 31, 2022 USD ($)	Aug. 31, 2022 EUR (€)	Aug. 31, 2022 GBP (£)	Dec. 31, 2021 GBP (£)
Debt Instrument [Line Items]
Percent of operating capacity	93.00%	93.00%	93.00%
Cash, cash equivalents, and short-term investments	$ 7,400
Long-term debt	34,808
Sterling Overnight Index Average (SONIA)
Debt Instrument [Line Items]
Long-term debt	8,400			£ 350
Unsecured Debt \| Revolving Credit Facility, Multi-currency, U.S. Dollar-denominated
Debt Instrument [Line Items]
Line of credit	$ 1,700
Unsecured Debt \| Revolving Credit Facility, Multi-currency, Euro-denominated
Debt Instrument [Line Items]
Line of credit \| €		€ 1.0
Unsecured Debt \| Revolving Credit Facility, Multi-currency, Sterling-denominated
Debt Instrument [Line Items]
Line of credit \| £			£ 200