Summary of Significant Accounting Policies - SPPC - Schedule of Allowance for Credit Loss (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Charged to operating costs and expenses, net	$ 43	$ 81	$ 56
Write-offs, net	(45)	(50)	(28)
SPPC
Accounts Receivable, Allowance for Credit Loss [Roll Forward]
Beginning balance	1	2	2
Charged to operating costs and expenses, net	2	2	2
Write-offs, net	(1)	(3)	(2)
Ending balance	$ 2	$ 1	$ 2