Summary of Significant Accounting Policies (Other Noncurrent Assets) (Details) - USD ($) $ in Millions	Dec. 31, 2022	Dec. 31, 2021
Offsetting Assets [Line Items]
Other (including amounts related to VIEs)	$ 3,400	$ 3,632
Renewable Energy Program
Offsetting Assets [Line Items]
Other (including amounts related to VIEs)	$ 150

Amount of noncurrent assets classified as other.

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(17))
-URI https://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682

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