Fair Value (Instruments Not Measured at Fair Value) (Details) - USD ($) $ in Millions		Sep. 30, 2022	Dec. 31, 2021
Estimate of Fair Value Measurement [Member]
Assets, Fair Value Disclosure [Abstract]
Value added tax			$ 2
Accounts receivable - noncurrent	[1]	$ 132	117
Liabilities, Fair Value Disclosure [Abstract]
Non-recourse debt, including $2,167 and $2,223, respectively, related to variable interest entities		16,368	16,091
Recourse debt		4,175	3,818
Carrying Amount [Member]
Assets, Fair Value Disclosure [Abstract]
Accounts receivable - noncurrent	[1]	92	55
Liabilities, Fair Value Disclosure [Abstract]
Non-recourse debt, including $2,167 and $2,223, respectively, related to variable interest entities		17,358	14,811
Recourse debt		4,668	3,754
Non-recourse debt, including $2,167 and $2,223, respectively, related to variable interest entities		15,530	13,603
Level 1 [Member] | Estimate of Fair Value Measurement [Member]
Assets, Fair Value Disclosure [Abstract]
Accounts receivable - noncurrent		0	0
Liabilities, Fair Value Disclosure [Abstract]
Non-recourse debt, including $2,167 and $2,223, respectively, related to variable interest entities		0	0
Recourse debt		0	0
Level 2 [Member] | Estimate of Fair Value Measurement [Member]
Assets, Fair Value Disclosure [Abstract]
Accounts receivable - noncurrent		0	0
Liabilities, Fair Value Disclosure [Abstract]
Non-recourse debt, including $2,167 and $2,223, respectively, related to variable interest entities		14,870	16,065
Recourse debt		4,175	3,818
Level 3 [Member] | Estimate of Fair Value Measurement [Member]
Assets, Fair Value Disclosure [Abstract]
Accounts receivable - noncurrent	[1]	132	117
Liabilities, Fair Value Disclosure [Abstract]
Non-recourse debt, including $2,167 and $2,223, respectively, related to variable interest entities		1,498	26
Recourse debt		$ 0	$ 0

[1] These amounts primarily relate to amounts due from CAMMESA, the administrator of the wholesale electricity market in Argentina, and amounts impacted by the Stabilization Fund enacted by the Chilean government, and are included in Other noncurrent assets in the accompanying Condensed Consolidated Balance Sheets. The fair value and carrying amount of these receivables exclude VAT of $2 million as of September 30, 2022 and December 31, 2021.