Fair Value (Instruments Not Measured at Fair Value) (Details) - USD ($) $ in Millions		Mar. 31, 2023	Dec. 31, 2022
Estimate of Fair Value Measurement [Member]
Assets, Fair Value Disclosure [Abstract]
Accounts receivable - noncurrent	[1]	$ 229	$ 294
Liabilities, Fair Value Disclosure [Abstract]
Non-recourse debt, including $2,413 and $2,295, respectively, related to variable interest entities		19,851	18,527
Recourse debt		4,231	3,505
Carrying Amount [Member]
Assets, Fair Value Disclosure [Abstract]
Accounts receivable - noncurrent	[1]	190	255
Liabilities, Fair Value Disclosure [Abstract]
Non-recourse debt, including $2,413 and $2,295, respectively, related to variable interest entities		20,073	19,429
Recourse debt		4,581	3,894
Non-recourse debt, including $2,413 and $2,295, respectively, related to variable interest entities		18,513	17,846
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 $2,413 and $2,295, 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 $2,413 and $2,295, respectively, related to variable interest entities		18,375	17,089
Recourse debt		4,231	3,505
Level 3 [Member] | Estimate of Fair Value Measurement [Member]
Assets, Fair Value Disclosure [Abstract]
Accounts receivable - noncurrent	[1]	229	294
Liabilities, Fair Value Disclosure [Abstract]
Non-recourse debt, including $2,413 and $2,295, respectively, related to variable interest entities		1,476	1,438
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 Funds enacted by the Chilean government, and are included in Other noncurrent assets in the accompanying Condensed Consolidated Balance Sheets.