Supplemental Financial Information - Investments (Details) - USD ($) $ in Millions	Jun. 30, 2022	Dec. 31, 2021
Summary of Investment Holdings [Line Items]
Investments	$ 734	$ 816
Equity securities
Summary of Investment Holdings [Line Items]
Investments	620	748
Other
Summary of Investment Holdings [Line Items]
Investments	$ 114	$ 68

The total amount of investments that are intended to be held for an extended period of time (longer than one operating cycle).

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 210
-SubTopic 10
-Section S99
-Paragraph 1
-Subparagraph (SX 210.5-02(12))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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