Fair Value (Instruments Not Measured at Fair Value) (Details) - USD ($) $ in Millions		Jun. 30, 2022	Dec. 31, 2021
Estimate of Fair Value Measurement [Member]
Assets, Fair Value Disclosure [Abstract]
Value added tax			$ 2
Accounts receivable - noncurrent	[1]	$ 81	117
Liabilities, Fair Value Disclosure [Abstract]
Non-recourse debt, including $2,142 and $2,223, respectively, related to variable interest entities		17,654	16,091
Recourse debt		3,812	3,818
Carrying Amount [Member]
Assets, Fair Value Disclosure [Abstract]
Accounts receivable - noncurrent	[1]	44	55
Liabilities, Fair Value Disclosure [Abstract]
Non-recourse debt, including $2,142 and $2,223, respectively, related to variable interest entities		17,020	14,811
Recourse debt		4,177	3,754
Non-recourse debt, including $2,142 and $2,223, respectively, related to variable interest entities		14,997	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 $2,142 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 $2,142 and $2,223, respectively, related to variable interest entities		15,451	16,065
Recourse debt		3,812	3,818
Level 3 [Member] | Estimate of Fair Value Measurement [Member]
Assets, Fair Value Disclosure [Abstract]
Accounts receivable - noncurrent	[1]	81	117
Liabilities, Fair Value Disclosure [Abstract]
Non-recourse debt, including $2,142 and $2,223, respectively, related to variable interest entities		2,203	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 June 30, 2022 and December 31, 2021.