Segment Information (Narrative) (Details)	3 Months Ended		9 Months Ended
	Sep. 30, 2022 USD ($)	Sep. 30, 2021 USD ($)	Sep. 30, 2022 USD ($) segment	Sep. 30, 2021 USD ($) segment
Segment Reporting Information [Line Items]
Number of reportable segments | segment			2	2
Revenues	$ 5,500,000,000	$ 4,570,000,000	$ 15,265,000,000	$ 13,812,000,000
Intersegment, Nonoperating
Segment Reporting Information [Line Items]
Revenues			$ 0	$ 0