The AES Corporation (AES) 10-K 28 Feb 20 2019 FY Annual report Financial data

Document And Entity Information

Document And Entity Information - USD ($)	12 Months Ended
	Dec. 31, 2019	Feb. 21, 2020	Dec. 31, 2018	Jun. 30, 2018
Title of 12(b) Security	Common Stock, par value $0.01 per share
City Area Code	(703)
Entity Address, Address Line One	4300 Wilson Boulevard
Entity Incorporation, State or Country Code	DE
Document Transition Report	false
Document Quarterly Report	true
Document Type	10-K
Amendment Flag	false
Document Period End Date	Dec. 31, 2019
Entity File Number	1-12291
Common Stock, Value, Issued	$ (8,000,000)		$ (8,000,000)	$ (16.38)
Document Fiscal Year Focus	2019
Document Fiscal Period Focus	FY
Trading Symbol	AES
Entity Registrant Name	THE AES CORPORATION
Entity Central Index Key	0000874761
Current Fiscal Year End Date	--12-31
Entity Filer Category	Large Accelerated Filer
Entity Emerging Growth Company	false
Entity Small Business	false
Entity Common Stock, Shares Outstanding		664,036,935
Entity current reporting status	Yes
Entity Interactive Data Current	Yes
Entity Shell Company	false
Entity voluntary filers	No
Entity Well Known Seasoned Issuer	Yes
Entity Public Float				$ 10,870,000,000
Common Stock, Par or Stated Value Per Share	$ 0.01		$ 0.01
Entity Tax Identification Number	54-1163725
Entity Address, City or Town	Arlington,
Entity Address, State or Province	VA
Entity Address, Postal Zip Code	22203
Local Phone Number	522-1315
Security Exchange Name	NYSE

Consolidated Balance Sheets

Consolidated Balance Sheets - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	$ 1,572,000,000	$ 2,003,000,000
CURRENT ASSETS
Cash and cash equivalents	1,029,000,000	1,166,000,000
Restricted cash	336,000,000	370,000,000
Short-term investments	400,000,000	313,000,000
Accounts receivable, net of allowance for doubtful accounts of $20 and $23, respectively	1,479,000,000	1,595,000,000
Inventory	487,000,000	577,000,000
Prepaid expenses	80,000,000	130,000,000
Other current assets	802,000,000	807,000,000
Current held-for-sale assets	618,000,000	57,000,000
Total current assets	5,231,000,000	5,015,000,000
Property, Plant and Equipment:
Land	447,000,000	449,000,000
Electric generation, distribution assets and other	25,383,000,000	25,242,000,000
Accumulated depreciation	(8,505,000,000)	(8,227,000,000)
Construction in progress	5,249,000,000	3,932,000,000
Property, plant and equipment, net	22,574,000,000	21,396,000,000
Other Assets:
Investments in and advances to affiliates	966,000,000	1,114,000,000
Debt service reserves and other deposits	207,000,000	467,000,000
Goodwill	1,059,000,000	1,059,000,000
Other intangible assets, net of accumulated amortization of $307 and $457, respectively	469,000,000	436,000,000
Deferred income taxes	156,000,000	97,000,000
Service concession assets, net of accumulated amortization of $0 and $0, respectively		0
Financing Receivable, before Allowance for Credit Loss, Noncurrent	1,351,000,000	1,423,000,000
Other noncurrent assets	1,635,000,000	1,514,000,000
Total other assets	5,843,000,000	6,110,000,000
TOTAL ASSETS	33,648,000,000	32,521,000,000
CURRENT LIABILITIES
Accounts payable	1,311,000,000	1,329,000,000
Accrued interest	201,000,000	191,000,000
Accrual for Taxes Other than Income Taxes, Current	253,000,000	250,000,000
Accrued and other liabilities	1,021,000,000	962,000,000
Non-recourse debt, including $337 and $479, respectively, related to variable interest entities	1,868,000,000	1,659,000,000
Current held-for-sale liabilities	442,000,000	8,000,000
Total current liabilities	5,096,000,000	4,399,000,000
NONCURRENT LIABILITIES
Non-recourse debt, including $3,872 and $2,922 respectively, related to variable interest entities	14,914,000,000	13,986,000,000
Recourse debt	3,391,000,000	3,650,000,000
Deferred income taxes	1,213,000,000	1,280,000,000
Other noncurrent liabilities	2,917,000,000	2,723,000,000
Total noncurrent liabilities	22,435,000,000	21,639,000,000
Commitments and Contingencies (see Notes 12 and 13)
Redeemable stock of subsidiaries	888,000,000	879,000,000
THE AES CORPORATION STOCKHOLDERS’ EQUITY
Common stock ($0.01 par value, 1,200,000,000 shares authorized; 817,843,916 issued and 663,952,656 outstanding at December 31, 2019 and 817,203,691 issued and 662,298,096 outstanding at December 31, 2018)	8,000,000	8,000,000
Additional paid-in capital	7,776,000,000	8,154,000,000
Accumulated deficit	(692,000,000)	(1,005,000,000)
Accumulated other comprehensive loss	(2,229,000,000)	(2,071,000,000)
Treasury stock, at cost (153,891,260 and 154,905,595 shares at December 31, 2019 and December 31, 2018, respectively)	(1,867,000,000)	(1,878,000,000)
Total AES Corporation stockholders’ equity	2,996,000,000	3,208,000,000
NONCONTROLLING INTERESTS	2,233,000,000	2,396,000,000
Total equity	5,229,000,000	5,604,000,000
TOTAL LIABILITIES AND EQUITY	$ 33,648,000,000	$ 32,521,000,000

Consolidated Balance Sheets (Pa

Consolidated Balance Sheets (Parenthetical) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Statement of Financial Position [Abstract]
Accounts receivable, allowance for doubtful accounts	$ 20	$ 23
Other intangible assets, accumulated amortization	307	457
Service Concession Asset, Accumulated Depreciation	$ 0	$ 0
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,200,000,000	1,200,000,000
Common stock, shares issued (in shares)	817,843,916	817,203,691
Common stock, shares outstanding (in shares)	663,952,656	662,298,096
Treasury stock, shares (in shares)	153,891,260	154,905,595
Variable Interest Entity [Line Items]
Non-recourse debt - current balance at variable interest entities	$ 1,868	$ 1,659
Non-recourse debt - noncurrent, balance at variable interest entities	14,914	13,986
Consolidated Variable Interest Entities [Member]
Variable Interest Entity [Line Items]
Non-recourse debt - current balance at variable interest entities	337	479
Non-recourse debt - noncurrent, balance at variable interest entities	$ 3,873	$ 2,922

Consolidated Statements of Oper

Consolidated Statements of Operations - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues	$ 10,189	$ 10,736	$ 10,530
Cost of Goods and Services Sold	7,840	8,163	8,065
Operating margin	2,349	2,573	2,465
General and administrative expenses	(196)	(192)	(215)
Interest expense	(1,050)	(1,056)	(1,170)
Interest income	318	310	244
Loss on extinguishment of debt	(169)	(188)	(68)
Other expense	80	58	58
Other income	145	72	120
Gain (loss) on disposal and sale of business interests	28	984	(52)
Asset impairment expense	(185)	(208)	(537)
Foreign currency transaction gains (losses)	(67)	(72)	42
Other non-operating expense	(92)	(147)	0
INCOME FROM CONTINUING OPERATIONS BEFORE TAXES AND EQUITY IN EARNINGS OF AFFILIATES	1,001	2,018	771
Income tax expense	(352)	(708)	(990)
Net equity in earnings (losses) of affiliates	(172)	39	71
INCOME (LOSS) FROM CONTINUING OPERATIONS	477	1,349	(148)
Loss from operations of discontinued businesses, net of income tax expense of $0, $2, and $21, respectively	0	(9)	(18)
Gain (loss) from disposal of discontinued businesses, net of income tax expense of $0, $44, and $0, respectively	1	225	(611)
NET INCOME (LOSS)	478	1,565	(777)
Less: Income (Loss) from Continuing Operations, Net of Tax, Attributable to Noncontrolling Interest	175	364	359
Less: Loss (income) from discontinued operations attributable to noncontrolling interests	0	2	(25)
NET INCOME (LOSS) ATTRIBUTABLE TO THE AES CORPORATION	303	1,203	(1,161)
AMOUNTS ATTRIBUTABLE TO THE AES CORPORATION COMMON STOCKHOLDERS:
Income (loss) from continuing operations, net of tax	302	985	(507)
Income (loss) from discontinued operations, net of tax	1	218	(654)
NET INCOME (LOSS) ATTRIBUTABLE TO THE AES CORPORATION	$ 303	$ 1,203	$ (1,161)
BASIC EARNINGS PER SHARE:
Income (loss) from continuing operations attributable to The AES Corporation common stockholders, net of tax	$ 0.46	$ 1.49	$ (0.77)
Income (loss) from discontinued operations attributable to The AES Corporation common stockholders, net of tax	0	0.33	(0.99)
NET INCOME (LOSS) ATTRIBUTABLE TO THE AES CORPORATION COMMON STOCKHOLDERS	0.46	1.82	(1.76)
DILUTED EARNINGS PER SHARE:
Income (loss) from continuing operations attributable to The AES Corporation common stockholders, net of tax	0.45	1.48	(0.77)
Income (loss) from discontinued operations attributable to The AES Corporation common stockholders, net of tax	0	0.33	(0.99)
NET INCOME (LOSS) ATTRIBUTABLE TO THE AES CORPORATION COMMON STOCKHOLDERS	$ 0.45	$ 1.81	$ (1.76)
Electricity, Generation [Member]
Revenues	$ 7,161	$ 7,797	$ 7,421
Cost of Goods and Services Sold	5,356	5,690	5,415
Electric Distribution [Member]
Revenues	3,028	2,939	3,109
Cost of Goods and Services Sold	$ 2,484	$ 2,473	$ 2,650

Consolidated Statements of Op_2

Consolidated Statements of Operations (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement [Abstract]
Income (loss) from operations of discontinued businesses, income tax benefit (expense)	$ 0	$ (2)	$ (21)
Gain (loss) from disposal of discontinued businesses, income tax benefit (expense)	$ 0	$ (44)	$ 0

Consolidated Statements of Comp

Consolidated Statements of Comprehensive Income - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
NET INCOME (LOSS)	$ 478	$ 1,565	$ (777)
Foreign currency translation activity:
Foreign currency translation adjustments, net of income tax benefit of $1, $2 and $17, respectively	(33)	(161)	(9)
Reclassification to earnings, net of $0 income tax for all periods	23	(21)	643
Total foreign currency translation adjustments	(10)	(182)	634
Derivative activity:
Change in derivative fair value, net of income tax benefit of $74, $27 and $10, respectively	(265)	(67)	(12)
Reclassification to earnings, net of income tax expense of $12, $24 and $1, respectively	42	93	50
Total change in fair value of derivatives	(223)	26	38
Pension activity:
Change in pension adjustments due to prior service cost, net of income tax benefit (expense) of $0, $1 and $(1), respectively	1	(2)	2
Change in pension adjustments due to net actuarial gain (loss) for the period, net of income tax benefit of $10, $1 and $6, respectively	(23)	(1)	(21)
Reclassification to earnings, net of income tax expense of $13, $2 and $135, respectively	28	8	266
Total pension adjustments	6	5	247
OTHER COMPREHENSIVE INCOME (LOSS)	(227)	(151)	919
COMPREHENSIVE INCOME	251	1,414	142
Less: Comprehensive income attributable to noncontrolling interests and redeemable stock of subsidiaries	(102)	(425)	(390)
COMPREHENSIVE INCOME (LOSS) ATTRIBUTABLE TO THE AES CORPORATION	$ 149	$ 989	$ (248)

Consolidated Statements of Co_2

Consolidated Statements of Comprehensive Income (Parenthetical) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Statement of Comprehensive Income [Abstract]
Foreign currency translation adjustments, income tax	$ 1	$ 2	$ 17
Foreign currency, reclassification to earnings, income tax benefit (expense)	0	0	0
Other Comprehensive Income (Loss), Unrealized Gain (Loss) on Derivatives Arising During Period, Tax	74	27	10
Other Comprehensive Income (Loss), Reclassification Adjustment from AOCI on Derivatives, Tax	(12)	(24)	(1)
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Tax	0	1	(1)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax	10	1	6
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss), Reclassification Adjustment from AOCI, Tax	$ (13)	$ (2)	$ (135)

Consolidated Statements of Chan

Consolidated Statements of Changes in Equity - USD ($) shares in Millions, $ in Millions		Total	Common Stock [Member]	Treasury Stock	Additional Paid-in Capital [Member]	Retained Earnings (Accumulated Deficit)	AOCI Attributable to Parent [Member]	Noncontrolling Interest [Member]
Common Stock, Dividends, Per Share, Declared		$ 0.4900
Beginning Balance at Dec. 31, 2016			$ 8	$ (1,904)	$ 8,592	$ (1,146)	$ (2,756)	$ 2,906
Beginning Balance (Shares) at Dec. 31, 2016			816.1	156.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		$ (777)	$ 0	$ 0	0	(1,161)	0	384
Total foreign currency translation adjustment, net of income tax		634	0	0	0	0	661	(27)
Total change in derivative fair value, net of income tax		38	0	0	0	0	23	15
Total pension adjustments, net of income tax		247	0	0	0	0	229	18
OTHER COMPREHENSIVE INCOME (LOSS)		$ 919					913	6
Fair value adjustment (2)	[1]		0	0	(25)	0	0	0
Disposition of business interests (3)	[2]		0	0	0	0	0	(666)
Distributions to noncontrolling interests			0	0	0	0	0	426
Contributions from noncontrolling interests			0	0	0	0	0	11
Dividends declared on common stock ($0.49/share)			$ 0	$ 0	(324)	0	0	0
Issuance and exercise of stock-based compensation benefit plans (Shares)			0.2	(1)
Issuance and exercise of stock-based compensation benefit plans, net of income tax			$ 0	$ 12	5	0	0	0
Sales to noncontrolling interests			0	0	13	0	7	83
Acquisition of subsidiary shares from noncontrolling interests			0	0	240	0	(40)	(68)
Ending Balance at Dec. 31, 2017			$ 8	$ (1,892)	8,501	(2,276)	(1,876)	2,380
Ending Balance (Shares) at Dec. 31, 2017			816.3	155.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Temporary Equity, Net Income			$ 0	$ 0	0	0	0	14
Cumulative effect of a change in accounting principle (1)	[3]		0	0	0	31	0	0
Common Stock, Dividends, Per Share, Declared		$ 0.13
Net income (loss)		$ 777
Common Stock, Dividends, Per Share, Declared		$ 0.5300
Beginning Balance at Dec. 31, 2017			$ 8	$ (1,892)	8,501	(2,276)	(1,876)	2,380
Beginning Balance (Shares) at Dec. 31, 2017			816.3	155.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		$ 1,565	$ 0	$ 0	0	1,203	0	360
Total foreign currency translation adjustment, net of income tax		(182)	0	0	0	0	(235)	53
Total change in derivative fair value, net of income tax		26	0	0	0	0	14	10
Total pension adjustments, net of income tax		5	0	0	0	0	7	(2)
OTHER COMPREHENSIVE INCOME (LOSS)		(151)					(214)	61
Fair value adjustment (2)	[1]		0	0	(4)	0	0	0
Disposition of business interests (3)	[2]		0	0	0	0	0	(250)
Distributions to noncontrolling interests			0	0	0	0	0	343
Contributions from noncontrolling interests			0	0	0	0	0	9
Dividends declared on common stock ($0.49/share)			$ 0	$ 0	(348)	0	0	0
Issuance and exercise of stock-based compensation benefit plans (Shares)			0.9	(1)
Issuance and exercise of stock-based compensation benefit plans, net of income tax			$ 0	$ 14	8	0	0	0
Sales to noncontrolling interests			0	0	(3)	0	0	98
Acquisition of subsidiary shares from noncontrolling interests					0
Ending Balance at Dec. 31, 2018		5,604	$ 8	$ (1,878)	8,154	(1,005)	(2,071)	2,396
Ending Balance (Shares) at Dec. 31, 2018			817.2	154.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Temporary Equity, Net Income		$ 2
Cumulative effect of a change in accounting principle (1)	[3]		$ 0	$ 0	0	68	19	81
Common Stock, Dividends, Per Share, Declared		$ 0.14
Net income (loss)		$ 233
Common Stock, Dividends, Per Share, Declared		$ 0.5528
Beginning Balance at Dec. 31, 2018		$ 5,604	$ 8	$ (1,878)	8,154	(1,005)	(2,071)	2,396
Beginning Balance (Shares) at Dec. 31, 2018			817.2	154.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)		478	$ 0	$ 0	0	303	0	182
Total foreign currency translation adjustment, net of income tax		(10)	0	0	0	0	0	(10)
Total change in derivative fair value, net of income tax		(223)	0	0	0	0	(166)	(57)
Total pension adjustments, net of income tax		6	0	0	0	0	12	(6)
OTHER COMPREHENSIVE INCOME (LOSS)		$ (227)					(154)	(73)
Fair value adjustment (2)	[1]		0	0	(6)	0	0	0
Distributions to noncontrolling interests			0	0	0	0	0	415
Contributions from noncontrolling interests			0	0	0	0	0	7
Dividends declared on common stock ($0.49/share)			$ 0	$ 0	(367)	0	0	0
Purchase of treasury stock (shares)		0
Issuance and exercise of stock-based compensation benefit plans (Shares)			0.6	(1)
Issuance and exercise of stock-based compensation benefit plans, net of income tax			$ 0	$ 11	0	0	0	0
Sales to noncontrolling interests			0	0	(5)	0	0	136
Acquisition of subsidiary shares from noncontrolling interests					0
Ending Balance at Dec. 31, 2019		$ 5,229	$ 8	$ (1,867)	7,776	(692)	(2,229)	2,233
Ending Balance (Shares) at Dec. 31, 2019			817.8	153.9
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Temporary Equity, Net Income		$ (7)
Cumulative effect of a change in accounting principle (1)	[3]		$ 0	$ 0	$ 0	$ 10	$ (4)	$ 0
[1]	Adjustment to the carrying amount of noncontrolling interest and redeemable stock of subsidiaries to fair value.
[2]	See Note 25 —Held-for-Sale and Dispositions for further information.
[3]	See Note 1 — General and Summary of Significant Accounting Policies

Consolidated Statements of Cash

Consolidated Statements of Cash Flows $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
OPERATING ACTIVITIES:
Net income (loss)	$ 478	$ 1,565	$ (777)
Adjustments to net income (loss):
Depreciation and amortization	1,045	1,003	1,169
Loss (gain) on disposal and sale of business interests	(28)	(984)	52
Impairment expenses	277	355	537
Deferred income taxes	(8)	313	672
Loss on extinguishment of debt	169	188	68
Loss on sale and disposal of assets	54	27	43
Net loss (gain) from disposal and impairments of discontinued businesses	0	(269)	611
Income (Loss) from Equity Method Investments, Net of Dividends or Distributions	194	48	46
Other	324	283	148
Changes in operating assets and liabilities:
(Increase) decrease in accounts receivable	73	(206)	(177)
(Increase) decrease in inventory	28	(36)	(28)
(Increase) decrease in prepaid expenses and other current assets	42	(22)	107
(Increase) decrease in other assets	(20)	(32)	(295)
Increase (decrease) in accounts payable and other current liabilities	(6)	62	163
Increase (decrease) in income tax payables, net and other tax payables	(83)	(7)	53
Increase (decrease) in other liabilities	(73)	55	112
Net cash provided by operating activities	2,466	2,343	2,504
INVESTING ACTIVITIES:
Capital expenditures	(2,405)	(2,121)	(2,177)
Acquisitions of business interests, net of cash and restricted cash acquired	(192)	(66)	(609)
Proceeds from the sale of business interests, net of cash and restricted cash sold	178	2,020	108
Sale of short-term investments	666	1,302	3,540
Payments for Advance to Affiliate	(324)	(145)	(89)
Purchase of short-term investments	(770)	(1,411)	(3,310)
Proceeds from Insurance Settlement, Investing Activities	150	17	15
Other investing	(24)	(101)	(77)
Net cash used in investing activities	(2,721)	(505)	(2,599)
FINANCING ACTIVITIES:
Borrowings under the revolving credit facilities	2,026	1,865	2,156
Repayments under the revolving credit facilities	(1,735)	(2,238)	(1,742)
Issuance of recourse debt	0	1,000	1,025
Repayments of recourse debt	(450)	(1,933)	(1,353)
Issuance of non-recourse debt	5,828	1,928	3,222
Repayments of non-recourse debt	(4,831)	(1,411)	(2,360)
Payments for financing fees	(126)	(39)	(100)
Distributions to noncontrolling interests	(427)	(340)	(424)
Contributions from noncontrolling interests and redeemable security holders	17	43	73
Dividends paid on AES common stock	(362)	(344)	(317)
Payments for financed capital expenditures	(146)	(275)	(179)
Other financing	120	101	42
Net cash provided by (used in) financing activities	(86)	(1,643)	43
Effect of exchange rate changes on cash, cash equivalents and restricted cash	(18)	(54)	8
(Increase) decrease in cash, cash equivalents and restricted cash of discontinued operations and held-for-sale businesses	(72)	74	(128)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Period Increase (Decrease), Including Exchange Rate Effect	(431)	215	(172)
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Beginning	2,003	1,788	1,960
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents, Ending	1,572	2,003	1,788
SUPPLEMENTAL DISCLOSURES:
Cash payments for interest, net of amounts capitalized	946	1,003	1,196
Cash payments for income taxes, net of refunds	363	370	377
SCHEDULE OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Non Cash Refinancing of Non-recourse Debt	1,081	0	0
Noncash or Part Noncash Acquisition, Value of Assets Acquired	0	16	0
Noncash or Part Noncash Acquisition, Debt Assumed	0	119	0
Contributions of assets and liabilities for the Fluence transaction (see Note 19)	95	90	86
NonCash Restructuring and Recapitalization	0	0	279
Non-Cash Long Term Receivables	0	0	75
sPower [Member]
SCHEDULE OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Reinvestment of Proceeds from Sale of Equity Method Investments	58	0	0
Fluence [Member] | Non-cash [Member]
SCHEDULE OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Contribution of Property	61	20	0
Distributed Energy [Member]
SCHEDULE OF NONCASH INVESTING AND FINANCING ACTIVITIES:
Noncash or Part Noncash Acquisition, Value of Assets Acquired	$ 0	$ 23	$ 0

General and Summary of Signific

General and Summary of Significant Accounting Policies	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
GENERAL AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES	GENERAL AND SUMMARY OF SIGNIFICANT ACCOUNTING POLICIES The AES Corporation is a holding company (the "Parent Company") that, through its subsidiaries and affiliates, (collectively, "AES" or "the Company") operates a geographically diversified portfolio of electricity generation and distribution businesses. Generally, the liabilities of individual operating entities are non-recourse to the Parent Company and are isolated to the operating entities. Most of our operating entities are structured as limited liability entities, which limit the liability of shareholders. The structure is generally the same regardless of whether a subsidiary is consolidated under a voting or variable interest model. The preparation of these consolidated financial statements is in conformity with accounting principles generally accepted in the United States of America ("U.S. GAAP"). PRINCIPLES OF CONSOLIDATION — The consolidated financial statements of the Company include the accounts of The AES Corporation and its controlled subsidiaries. Furthermore, VIEs in which the Company has an ownership interest and is the primary beneficiary, thus controlling the VIE, have been consolidated. Intercompany transactions and balances are eliminated in consolidation. Investments in entities where the Company has the ability to exercise significant influence, but not control, are accounted for using the equity method of accounting. NONCONTROLLING INTERESTS — Noncontrolling interests are classified as a separate component of equity in the Consolidated Balance Sheets and Consolidated Statements of Changes in Equity. Additionally, net income and comprehensive income attributable to noncontrolling interests are reflected separately from consolidated net income and comprehensive income on the Consolidated Statements of Operations and Consolidated Statements of Changes in Equity. Any change in ownership of a subsidiary while the controlling financial interest is retained is accounted for as an equity transaction between the controlling and noncontrolling interests (unless the transaction qualified as a sale of in-substance real estate). Losses continue to be attributed to the noncontrolling interests, even when the noncontrolling interests' basis has been reduced to zero. Equity securities with redemption features that are not solely within the control of the issuer are classified outside of permanent equity. Generally, initial measurement will be at fair value. Subsequent measurement and classification vary depending on whether the instrument is probable of becoming redeemable. When the equity instrument is not probable of becoming redeemable, subsequent allocation of income and dividends is classified in permanent equity. For those securities where it is probable that the instrument will become redeemable or that are currently redeemable, AES recognizes changes in the fair value at each accounting period against retained earnings or additional paid-in-capital in the absence of retained earnings, subject to the floor of the initial fair value. Further, the allocation of income and dividends, as well as the adjustment to fair value, is classified outside permanent equity. Instruments that are mandatorily redeemable are classified as a liability. EQUITY METHOD INVESTMENTS — Investments in entities over which the Company has the ability to exercise significant influence, but not control, are accounted for using the equity method of accounting and reported in Investments in and advances to affiliates on the Consolidated Balance Sheets. The Company’s proportionate share of the net income or loss of these companies is included in Net equity in earnings (losses) of affiliates on the Consolidated Statements of Operations . The Company utilizes the cumulative earning approach to determine whether distributions received from equity method investees are returns on investment or returns of investment. The Company discontinues the application of the equity method when an investment is reduced to zero and the Company is not otherwise committed to provide further financial support to the investee. The Company resumes the application of the equity method accounting to the extent that net income is greater than the share of net losses not previously recorded. Upon acquiring the investment, we determine the fair value of the identifiable assets and assumed liabilities and the basis difference between each fair value and the carrying amount of the corresponding asset or liability in the financial statements of the investee. The AES share of the amortization of the basis difference is recognized in Net equity in earnings of affiliates in the Consolidated Statements of Operations over the life of the asset or liability. The Company periodically assesses if impairment indicators exist at our equity method investments. When an impairment is observed, any excess of the carrying amount over its estimated fair value is recognized as impairment expense when the loss in value is deemed other-than-temporary and included in Other non-operating expense in the Consolidated Statements of Operations. BUSINESS INTERESTS — Acquisitions and disposals of business interests are generally transactions pertaining to operational legal entities, which may be accounted for as a consolidated business, an asset, or an equity method investment. Losses on expected sales of business interests are limited to the impairment of long-lived assets as of the date of execution of the sales agreement, which are recognized in Asset impairment expense in the Consolidated Statements of Operations. Any additional gains/(losses) on sales, which are primarily due to reclassification of cumulative translation adjustments, are recognized in Gain (loss) on disposal and sale of business interests in the Consolidated Statements of Operations upon completion of the sale. ALLOCATION OF EARNINGS — Certain of the Company's businesses are subject to profit-sharing arrangements where the allocation of cash distributions and the sharing of tax benefits are not based on fixed ownership percentages. These arrangements exist for certain U.S. renewable generation partnerships to designate different allocations of value among investors, where the allocations change in form or percentage over the life of the partnership. For these businesses, the Company uses the hypothetical liquidation at book value (“HLBV”) method when it is a reasonable approximation of the profit-sharing arrangement. The HLBV method calculates the proceeds that would be attributable to each partner based on the liquidation provisions of the respective operating partnership agreement if the partnership was to be liquidated at book value at the balance sheet date. Each partner’s share of income in the period is equal to the change in the amount of net equity they are legally able to claim based on a hypothetical liquidation of the entity at the end of a reporting period compared to the beginning of that period, adjusted for any capital transactions. The HLBV method is used both to allocate the equity earnings attributable to AES when the Company accounts for the renewable business as an equity method investment and to calculate the earnings attributable to noncontrolling interest when the business is consolidated by AES. In the early months of operations of a renewable generation facility where HLBV results in a significant decrease in the hypothetical liquidation proceeds attributable to the tax equity investor due to the recognition of ITCs or other adjustments as required by the U.S. Internal Revenue Code, the Company records the impact (sometimes referred to as the ‘Day one gain’) to income in the same period. USE OF ESTIMATES — U.S. GAAP requires the Company to make estimates and assumptions that affect the asset and liability balances reported as of the date of the consolidated financial statements, as well as the revenues and expenses recognized during the reporting period. Actual results could differ from those estimates. Items subject to such estimates and assumptions include: the carrying amount and estimated useful lives of long-lived assets; asset retirement obligations; impairment of goodwill, long-lived assets and equity method investments; valuation allowances for receivables and deferred tax assets; the recoverability of regulatory assets; regulatory liabilities; the fair value of financial instruments; the fair value of assets and liabilities acquired as business combinations or as asset acquisitions by variable interest entities; contingent consideration arising from business combinations or asset acquisitions by variable interest entities; the measurement of equity method investments or noncontrolling interest using the HLBV method for certain renewable generation partnerships; the determination of whether a sale of noncontrolling interests is considered to be a sale of in-substance real estate (as opposed to an equity transaction); pension liabilities; the incremental borrowing rates used in the determination of lease liabilities; the determination of lease and non-lease components in certain generation contracts; environmental liabilities; and potential litigation claims and settlements. HELD-FOR-SALE DISPOSAL GROUPS — A disposal group classified as held-for-sale is reflected on the balance sheet at the lower of its carrying amount or estimated fair value less cost to sell. A loss is recognized if the carrying amount of the disposal group exceeds its estimated fair value less cost to sell. This loss is limited to the carrying value of long-lived assets until the completion of the sale, at which point, any additional loss is recognized. If the fair value of the disposal group subsequently exceeds the carrying amount while the disposal group is still held-for-sale, any impairment expense previously recognized will be reversed up to the lesser of the previously recognized expense or the subsequent excess. Assets and liabilities related to a disposal group classified as held-for-sale are segregated in the current balance sheet in the period in which the disposal group is classified as held-for-sale. Assets and liabilities of held-for-sale disposal groups are classified as current when they are expected to be disposed of within twelve months. Transactions between the held-for-sale disposal group and businesses that are expected to continue to exist after the disposal are not eliminated to appropriately reflect the continuing operations and balances held-for-sale. See Note 25 — Held-for-Sale and Dispositions for further information. DISCONTINUED OPERATIONS — Discontinued operations reporting occurs only when the disposal of a business or a group of businesses represents a strategic shift that has (or will have) a major effect on the Company's operations and financial results. The Company reports financial results for discontinued operations separately from continuing operations to distinguish the financial impact of disposal transactions from ongoing operations. Prior period amounts in the Consolidated Statements of Operations and Consolidated Balance Sheets are retrospectively revised to reflect the businesses determined to be discontinued operations. The cash flows of businesses that are determined to be discontinued operations are included within the relevant categories within operating, investing and financing activities on the face of the Consolidated Statements of Cash Flows. Transactions between the businesses determined to be discontinued operations and businesses that are expected to continue to exist after the disposal are not eliminated to appropriately reflect the continuing operations and balances held-for-sale. The results of discontinued operations include any gain or loss recognized on closing or adjustment of the carrying amount to fair value less cost to sell, including gains or losses associated with noncontrolling interests upon completion of the disposal transaction. Adjustments related to components previously reported as discontinued operations under prior accounting guidance are presented as discontinued operations in the current period even if the disposed-of component to which the adjustments are related would not meet the criteria for presentation as a discontinued operation under current guidance. See Note 24 — Discontinued Operations for further information. FAIR VALUE — Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly, hypothetical transaction between market participants at the measurement date, or exit price. The Company applies the fair value measurement accounting guidance to financial assets and liabilities in determining the fair value of investments in marketable debt and equity securities, included in the Consolidated Balance Sheet line items Short-term investments and Other noncurrent assets ; derivative assets, included in Other current assets and Other noncurrent assets ; and, derivative liabilities, included in Accrued and other liabilities (current) and Other noncurrent liabilities . The Company applies the fair value measurement guidance to nonfinancial assets and liabilities upon the acquisition of a business or an asset acquisition by a variable interest entity, or in conjunction with the measurement of an asset retirement obligation or a potential impairment loss on an asset group, equity method investments, or goodwill. When determining the fair value measurements for assets and liabilities required to be reflected at their fair values, the Company considers the principal or most advantageous market in which it would transact and considers assumptions that market participants would use when pricing the assets or liabilities, such as inherent risk, transfer restrictions and risk of nonperformance. The Company is prohibited from including transaction costs and any adjustments for blockage factors in determining fair value. In determining fair value measurements, the Company maximizes the use of observable inputs and minimizes the use of unobservable inputs. Assets and liabilities are categorized within a fair value hierarchy based upon the lowest level of input that is significant to the fair value measurement: • Level 1: Quoted prices in active markets for identical assets or liabilities; • Level 2: Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices in active markets for similar assets or liabilities, quoted prices for identical or similar assets or liabilities in markets that are not active or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; or • Level 3: Unobservable inputs that are supported by little or no market activity and that are significant to the fair values of the assets or liabilities. Any transfers between all levels within the fair value hierarchy levels are recognized at the end of the reporting period. CASH AND CASH EQUIVALENTS — The Company considers unrestricted cash on hand, cash balances not restricted as to withdrawal or usage, deposits in banks, certificates of deposit and short-term marketable securities with original maturities of three months or less to be cash and cash equivalents. RESTRICTED CASH AND DEBT SERVICE RESERVES — Cash balances restricted as to withdrawal or usage, primarily via contract, are considered restricted cash. The following table provides a summary of cash, cash equivalents, and restricted cash amounts reported on the Consolidated Balance Sheets that reconcile to the total of such amounts as shown on the Consolidated Statements of Cash Flows (in millions): December 31, 2019 December 31, 2018 Cash and cash equivalents $ 1,029 $ 1,166 Restricted cash 336 370 Debt service reserves and other deposits 207 467 Cash, Cash Equivalents and Restricted Cash $ 1,572 $ 2,003 INVESTMENTS IN MARKETABLE SECURITIES — The Company's marketable investments are primarily unsecured debentures, certificates of deposit, government debt securities and money market funds. Short-term investments consist of marketable equity securities and debt securities with original maturities in excess of three months with remaining maturities of less than one year. Marketable debt securities where the Company has both the positive intent and ability to hold to maturity are classified as held-to-maturity and are carried at amortized cost. Remaining marketable debt securities are classified as available-for-sale or trading and are carried at fair value. Unrealized gains or losses on available-for-sale debt securities are reflected in AOCL, a separate component of equity, and the Consolidated Statements of Operations, respectively. Unrealized gains or losses on equity investments are reported in Other income . Interest and dividends on investments are reported in Interest income and Other income , respectively. Gains and losses on sales of investments are determined using the specific identification method. ACCOUNTS AND NOTES RECEIVABLE AND ALLOWANCE FOR DOUBTFUL ACCOUNTS — Accounts and notes receivable are carried at amortized cost. The Company periodically assesses the collectability of accounts receivable, considering factors such as historical collection experience, the age of accounts receivable and other currently available evidence supporting collectability, and records an allowance for doubtful accounts for the estimated uncollectible amount as appropriate. Certain of our businesses charge interest on accounts receivable. Interest income is recognized on an accrual basis. When collection of such interest is not reasonably assured, interest income is recognized as cash is received. Individual accounts and notes receivable are written off when they are no longer deemed collectible. INVENTORY — Inventory primarily consists of fuel and other raw materials used to generate power, and operational spare parts and supplies used to maintain power generation and distribution facilities. Inventory is carried at lower of cost or net realizable value. Cost is the sum of the purchase price and expenditures incurred to bring the inventory to its existing location. Inventory is primarily valued using the average cost method. Generally, if it is expected fuel inventory will not be recovered through revenue earned from power generation, an impairment is recognized to reflect the fuel at market value. The carrying amount of spare parts and supplies is typically reduced only in instances where the items are considered obsolete. LONG-LIVED ASSETS — Long-lived assets include property, plant and equipment, assets under finance leases and intangible assets subject to amortization (i.e., finite-lived intangible assets). Property, plant and equipment — Property, plant and equipment are stated at cost, net of accumulated depreciation. The cost of renewals and improvements that extend the useful life of property, plant and equipment are capitalized. Construction progress payments, engineering costs, insurance costs, salaries, interest and other costs directly relating to construction in progress are capitalized during the construction period, provided the completion of the construction project is deemed probable, or expensed at the time construction completion is determined to no longer be probable. The continued capitalization of such costs is subject to risks related to successful completion, including those related to government approvals, site identification, financing, construction permitting and contract compliance. Construction-in-progress balances are transferred to electric generation and distribution assets when an asset group is ready for its intended use. Government subsidies, liquidated damages recovered for construction delays, and income tax credits are recorded as a reduction to property, plant and equipment and reflected in cash flows from investing activities. Maintenance and repairs are charged to expense as incurred. Depreciation, after consideration of salvage value and asset retirement obligations, is computed using the straight-line method over the estimated useful lives of the assets, which are determined on a composite or component basis. Capital spare parts, including rotable spare parts, are included in electric generation and distribution assets. If the spare part is considered a component, it is depreciated over its useful life after the part is placed in service. If the spare part is deemed part of a composite asset, the part is depreciated over the composite useful life even when being held as a spare part. Certain of the Company's subsidiaries operate under concession contracts. Certain estimates are utilized to determine depreciation expense for the subsidiaries, including the useful lives of the property, plant and equipment and the amounts to be recovered at the end of the concession contract. The amounts to be recovered under these concession contracts are based on estimates that are inherently uncertain and actual amounts recovered may differ from those estimates. These concession contracts are not within the scope of ASC 853— Service Concession Arrangements . Intangible Assets Subject to Amortization — Finite-lived intangible assets are amortized over their useful lives which range from 1 – 50 years and are included in the Consolidated Balance Sheet line item Other intangible assets. The Company accounts for purchased emission allowances as intangible assets and records an expense when they are utilized or sold. Granted emission allowances are valued at zero. Impairment of Long-lived Assets — When circumstances indicate the carrying amount of long-lived assets in a held-for-use asset group may not be recoverable, the Company evaluates the assets for potential impairment using internal projections of undiscounted cash flows resulting from the use and eventual disposal of the assets. Events or changes in circumstances that may necessitate a recoverability evaluation include, but are not limited to, adverse changes in the regulatory environment, unfavorable changes in power prices or fuel costs, increased competition due to additional capacity in the grid, technological advancements, declining trends in demand, or an expectation it is more likely than not that the asset will be disposed of before the end of its previously estimated useful life. If the carrying amount of the assets exceeds the undiscounted cash flows, an impairment expense is recognized for the amount by which the carrying amount of the asset group exceeds its fair value (subject to the carrying amount not being reduced below fair value for any individual long-lived asset that is determinable without undue cost and effort). An impairment expense for certain assets may be reduced by the establishment of a regulatory asset if recovery through approved rates is probable. SERVICE CONCESSION ASSETS — Service concession assets are stated at cost, net of accumulated amortization, in accordance with ASC 853. Service concession assets represent the cost of all infrastructure to be transferred to the public-sector entity grantors at the end of the concession. These costs primarily represent construction progress payments, engineering costs, insurance costs, salaries, interest and other costs directly relating to construction of the service concession infrastructure. Government subsidies, liquidated damages recovered for construction delays and income tax credits are recorded as a reduction to Service Concession Assets. Service concession assets are amortized and recognized in earnings as a cost of goods sold as infrastructure construction revenue is recognized. Services provided under concession arrangements are recognized on a straight line basis. DEBT ISSUANCE COSTS — Costs incurred in connection with the issuance of long-term debt are deferred and presented as a direct reduction from the face amount of that debt and amortized over the related financing period using the effective interest method. Debt issuance costs related to a line-of-credit or revolving credit facility are deferred and presented as an asset and amortized over the related financing period. Make-whole payments in connection with early debt retirements are classified as cash flows used in financing activities. GOODWILL AND INDEFINITE-LIVED INTANGIBLE ASSETS — The Company evaluates goodwill and indefinite-lived intangible assets for impairment on an annual basis and whenever events or changes in circumstances necessitate an evaluation for impairment. The Company's annual impairment testing date is October 1 st . Goodwill — Goodwill represents the excess of the purchase price of the business acquisition over the fair value of identifiable net assets acquired. Goodwill resulting from an acquisition is assigned to the reporting units that are expected to benefit from the synergies of the acquisition. Generally, each AES business with a goodwill balance constitutes a reporting unit as they are not similar to other businesses in a segment nor are they reported to segment management together with other businesses. Goodwill is evaluated for impairment either under the qualitative assessment option or the quantitative test option to determine the fair value of the reporting unit. If goodwill is determined to be impaired, an impairment loss measured at the amount by which the reporting unit’s carrying amount exceeds its fair value, not to exceed the carrying amount of goodwill, is recorded. Indefinite-Lived Intangible Assets — The Company's indefinite-lived intangible assets primarily include land-use rights and water rights. Indefinite-lived intangible assets are evaluated for impairment either under the qualitative assessment option or the two-step quantitative test. If the carrying amount of an intangible asset being tested for impairment exceeds its fair value, the excess is recognized as impairment expense. ACCOUNTS PAYABLE AND OTHER ACCRUED LIABILITIES — Accounts payable consists of amounts due to trade creditors related to the Company's core business operations. These payables include amounts owed to vendors and suppliers for items such as energy purchased for resale, fuel, maintenance, inventory and other raw materials. Other accrued liabilities include items such as income taxes, regulatory liabilities, legal contingencies and employee-related costs, including payroll, and benefits. REGULATORY ASSETS AND LIABILITIES — The Company recognizes assets and liabilities that result from regulated ratemaking processes. Regulatory assets generally represent incurred costs which have been deferred due to the probable future recovery via customer rates. Generally, returns earned on regulatory assets are reflected in the Consolidated Statement of Operations within Interest Income . Regulatory liabilities generally represent obligations to refund customers. Management continually assesses whether regulatory assets are probable of future recovery and regulatory liabilities are probable of future payment by considering factors such as applicable regulatory changes, recent rate orders applicable to other regulated entities, and the status of any pending or potential deregulation legislation. If future recovery of costs previously deferred ceases to be probable, the related regulatory assets are written off and recognized in income from continuing operations. PENSION AND OTHER POSTRETIREMENT PLANS — The Company recognizes in its Consolidated Balance Sheets an asset or liability reflecting the funded status of pension and other postretirement plans with current-year changes in actuarial gains or losses recognized in AOCL, except for those plans at certain of the Company's regulated utilities that can recover portions of their pension and postretirement obligations through future rates. All plan assets are recorded at fair value. AES follows the measurement date provisions of the accounting guidance, which require a year-end measurement date of plan assets and obligations for all defined benefit plans. INCOME TAXES — Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of the existing assets and liabilities, and their respective income tax basis. The Company establishes a valuation allowance when it is more likely than not that all or a portion of a deferred tax asset will not be realized. The Company's tax positions are evaluated under a more likely than not recognition threshold and measurement analysis before they are recognized for financial statement reporting. Uncertain tax positions have been classified as noncurrent income tax liabilities unless expected to be paid within one year. The Company's policy for interest and penalties related to income tax exposures is to recognize interest and penalties as a component of the provision for income taxes in the Consolidated Statements of Operations. The Company has elected to treat GILTI as an expense in the period in which the tax is accrued. Accordingly, no deferred tax assets or liabilities are recorded related to GILTI. ASSET RETIREMENT OBLIGATIONS — The Company records the fair value of a liability for a legal obligation to retire an asset in the period in which the obligation is incurred. When a new liability is recognized, the Company capitalizes the costs of the liability by increasing the carrying amount of the related long-lived asset. The liability is accreted to its present value each period and the capitalized cost is depreciated over the useful life of the related asset. Upon settlement of the obligation, the Company eliminates the liability and, based on the actual cost to retire, may incur a gain or loss. FOREIGN CURRENCY TRANSLATION — A business's functional currency is the currency of the primary economic environment in which the business operates and is generally the currency in which the business generates and expends cash. Subsidiaries and affiliates whose functional currency is a currency other than the U.S. dollar translate their assets and liabilities into U.S. dollars at the current exchange rates in effect at the end of the fiscal period. Adjustments arising from the translation of the balance sheet of such subsidiaries are included in AOCL. The revenue and expense accounts of such subsidiaries and affiliates are translated into U.S. dollars at the average exchange rates for the period. Gains and losses on intercompany foreign currency transactions that are long-term in nature and which the Company does not intend to settle in the foreseeable future, are also recognized in AOCL. Gains and losses that arise from exchange rate fluctuations on transactions denominated in a currency other than the functional currency are included in determining net income. Accumulated foreign currency translation adjustments are reclassified from AOCL to net income only when realized upon sale or upon complete or substantially complete liquidation of the investment in a foreign entity. The accumulated adjustments are included in carrying amounts in impairment assessments where the Company has committed to a plan that will cause the accumulated adjustments to be reclassified to earnings. REVENUE RECOGNITION — Revenue is earned from the sale of electricity from our utilities and the production and sale of electricity and capacity from our generation facilities. Revenue is recognized upon the transfer of control of promised goods or services to customers in an amount that reflects the consideration to which we expect to be entitled in exchange for those goods or services. Revenue is recorded net of any taxes assessed on and collected from customers, which are remitted to the governmental authorities. Utilities — Our utilities sell electricity directly to end-users, such as homes and businesses, and bill customers directly. The majority of our utility contracts have a single performance obligation, as the promises to transfer energy, capacity, and other distribution and/or transmission services are not distinct. Additionally, as the performance obligation is satisfied over time as energy is delivered, and the same method is used to measure progress, the performance obligation meets the criteria to be considered a series. Utility revenue is classified as regulated on the Consolidated Statements of Operations. In exchange for the right to sell or distribute electricity in a service territory, our utility businesses are subject to government regulation. This regulation sets the framework for the prices (“tariffs”) that our utilities are allowed to charge customers for electricity. Since tariffs are determined by the regulator, the price that our

Inventory

Inventory	12 Months Ended
	Dec. 31, 2019
Inventory Disclosure [Abstract]
INVENTORY	INVENTORY Inventory is valued primarily using the average-cost method. The following table summarizes the Company's inventory balances as of the dates indicated (in millions): December 31, 2019 2018 Fuel and other raw materials $ 230 $ 300 Spare parts and supplies 257 277 Total $ 487 $ 577

Property Plant and Equipment

Property Plant and Equipment	12 Months Ended
	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
PROPERTY, PLANT AND EQUIPMENT	PROPERTY, PLANT AND EQUIPMENT The following table summarizes the components of the electric generation and distribution assets and other property, plant and equipment (in millions) with their estimated useful lives (in years). The amounts are stated net of all prior asset impairment losses recognized. December 31, Estimated Useful Life 2019 2018 Electric generation and distribution facilities 5-40 $ 22,869 $ 22,875 Other buildings 5-50 1,612 1,651 Furniture, fixtures and equipment 3-27 319 310 Other 5-40 583 406 Total electric generation and distribution assets and other 25,383 25,242 Accumulated depreciation (8,505 ) (8,227 ) Net electric generation and distribution assets and other $ 16,878 $ 17,015 The following table summarizes depreciation expense (including the amortization of assets recorded under finance leases in 2019 or capital leases in prior periods, and the amortization of asset retirement obligations) and interest capitalized during development and construction on qualifying assets for the periods indicated (in millions): Years Ended December 31, 2019 2018 2017 Depreciation expense $ 977 $ 960 $ 1,005 Interest capitalized during development and construction 238 199 139 Property, plant and equipment, net of accumulated depreciation, of $10 billion and $11 billion was mortgaged, pledged or subject to liens as of December 31, 2019 and 2018 , respectively, including assets classified as held-for-sale. The following table summarizes regulated and non-regulated generation and distribution property, plant and equipment and accumulated depreciation as of the dates indicated (in millions): December 31, 2019 2018 Regulated generation and distribution assets and other, gross $ 9,246 $ 8,959 Regulated accumulated depreciation (3,707 ) (3,504 ) Regulated generation and distribution assets and other, net 5,539 5,455 Non-regulated generation and distribution assets and other, gross 16,137 16,283 Non-regulated accumulated depreciation (4,798 ) (4,723 ) Non-regulated generation and distribution assets and other, net 11,339 11,560 Net electric generation and distribution assets and other $ 16,878 $ 17,015

Asset Retirement Obligation (No

Asset Retirement Obligation (Notes)	12 Months Ended
	Dec. 31, 2019
Asset Retirement Obligation Disclosure [Abstract]
Asset Retirement Obligation Disclosure [Text Block]	4 . ASSET RETIREMENT OBLIGATIONS The following table presents amounts recognized related to asset retirement obligations for the periods indicated (in millions): 2019 2018 Balance at January 1 $ 415 $ 368 Additional liabilities incurred 19 19 Liabilities settled (12 ) (14 ) Accretion expense 21 18 Change in estimated cash flows 58 24 Sale of plants (71 ) — Other (2 ) — Balance at December 31 $ 428 $ 415 The Company's asset retirement obligations include active ash landfills, water treatment basins and the removal or dismantlement of certain plants and equipment. The Company uses the cost approach to determine the initial value of ARO liabilities, which is estimated by discounting expected cash outflows to their present value using market-based rates at the initial recording of the liabilities. Cash outflows are based on the approximate future disposal costs as determined by market information, historical information or other management estimates. Subsequent downward revisions of ARO liabilities are discounted using the market-based rates that existed when the liability was initially recognized. These inputs to the fair value of the ARO liabilities are considered Level 3 inputs under the fair value hierarchy. During the year ended December 31, 2019 , the Company increased the asset retirement obligation and corresponding asset at IPL by $75 million and decreased the asset retirement obligation at DPL by $87 million . The increase at IPL reflects an increase to estimated ash pond closure costs, including groundwater remediation as required by the EPA under the Resource Conservation and Recovery Act. The decrease at DPL was attributable to a revision of the estimated liabilities resulting from the retirement of the Stuart and Killen facilities, and their subsequent transfer in December 2019. During the year ended December 31, 2018 , the $24 million increase in estimated cash flows was primarily attributable to an increase of $55 million in estimated ash pond closure costs and revised closure dates associated with an EPA rule regulating CCR at IPL and an increase in coal pile remediation costs at DPL. These were partially offset by a decrease of $32 million due to reductions in estimated closure costs associated with ash ponds and landfills at DPL resulting in a reduction to Cost of Sales on the Consolidated Statements of Operations.

Fair Value

Fair Value	12 Months Ended
	Dec. 31, 2019
Fair Value Disclosures [Abstract]
FAIR VALUE	FAIR VALUE The fair value of current financial assets and liabilities, debt service reserves and other deposits approximate their reported carrying amounts. The estimated fair values of the Company's assets and liabilities have been determined using available market information. Because these amounts are estimates and based on hypothetical transactions to sell assets or transfer liabilities, the use of different market assumptions and/or estimation methodologies may have a material effect on the estimated fair value amounts. Valuation Techniques — The fair value measurement accounting guidance describes three main approaches to measuring the fair value of assets and liabilities: (1) market approach, (2) income approach and (3) cost approach. The market approach uses prices and other relevant information generated from market transactions involving identical or comparable assets or liabilities. The income approach uses valuation techniques to convert future amounts to a single present value amount. The measurement is based on current market expectations of the return on those future amounts. The cost approach is based on the amount that would currently be required to replace an asset. The Company measures its investments and derivatives at fair value on a recurring basis. Additionally, in connection with annual or event-driven impairment evaluations, certain nonfinancial assets and liabilities are measured at fair value on a nonrecurring basis. These include long-lived tangible assets (i.e., property, plant and equipment), goodwill and intangible assets (e.g., sales concessions, land use rights and water rights, etc.). In general, the Company determines the fair value of investments and derivatives using the market approach and the income approach, respectively. In the nonrecurring measurements of nonfinancial assets and liabilities, all three approaches are considered; however, the value estimated under the income approach is often the most representative of fair value. Investments — The Company's investments measured at fair value generally consist of marketable debt and equity securities. Equity securities are either measured at fair value using quoted market prices or based on comparisons to market data obtained for similar assets. Debt securities primarily consist of unsecured debentures and certificates of deposit held by our Brazilian subsidiaries. Returns and pricing on these instruments are generally indexed to the market interest rates in Brazil. Debt securities are measured at fair value based on comparisons to market data obtained for similar assets. Derivatives — Derivatives are measured at fair value using quoted market prices or the income approach utilizing volatilities, spot and forward benchmark interest rates (such as LIBOR and EURIBOR), foreign exchange rates, credit data, and commodity prices, as applicable. When significant inputs are not observable, the Company uses relevant techniques to determine the inputs, such as regression analysis or prices for similarly traded instruments available in the market. The Company's methodology to fair value its derivatives is to start with any observable inputs; however, in certain instances the published forward rates or prices may not extend through the remaining term of the contract and management must make assumptions to extrapolate the curve, which necessitates the use of unobservable inputs, such as proxy commodity prices or historical settlements to forecast forward prices. Specifically, where there is limited forward curve data with respect to foreign exchange contracts, beyond the traded points, the Company utilizes the interest rate differential approach to construct the remaining portion of the forward curve. Similarly, in certain instances, the spread that reflects the credit or nonperformance risk is unobservable requiring the use of proxy yield curves of similar credit quality. To determine the fair value of a derivative, cash flows are discounted using the relevant spot benchmark interest rate. The Company then makes a credit valuation adjustment ("CVA"), as applicable, by further discounting the cash flows for nonperformance or credit risk based on the observable or estimated debt spread of the Company's subsidiary or its counterparty and the tenor of the respective derivative instrument. The CVA for potential future scenarios in which the derivative is in an asset position is based on the counterparty's credit ratings, credit default swap spreads, and debt spreads, as available. The CVA for potential future scenarios in which the derivative is in a liability position is based on the Parent Company's or the subsidiary's current debt spread. In the absence of readily obtainable credit information, the Parent Company's or the subsidiary's estimated credit rating (based on applying a standard industry model to historical financial information and then considering other relevant information) and spreads of comparably rated entities or the respective country's debt spreads are used as a proxy. All derivative instruments are analyzed individually and are subject to unique risk exposures. The fair value hierarchy of an asset or a liability is based on the level of significance of the input assumptions. An input assumption is considered significant if it affects the fair value by at least 10%. Assets and liabilities are classified as Level 3 when the use of unobservable inputs is significant. When the use of unobservable inputs is insignificant, assets and liabilities are classified as Level 2. Transfers between Level 3 and Level 2 result from changes in significance of unobservable inputs used to calculate the CVA. Debt — Recourse and non-recourse debt are carried at amortized cost. The fair value of recourse debt is estimated based on quoted market prices. The fair value of non-recourse debt is estimated based upon interest rates and other features of the loan. In general, the carrying amount of variable rate debt is a close approximation of its fair value. For fixed rate loans, the fair value is estimated using quoted market prices or discounted cash flow ("DCF") analyses. The fair value of recourse and non-recourse debt excludes accrued interest at the valuation date. The fair value was determined using available market information as of December 31, 2019 . The Company is not aware of any factors that would significantly affect the fair value amounts subsequent to December 31, 2019 . Nonrecurring measurements — For nonrecurring measurements derived using the income approach, fair value is generally determined using valuation models based on the principles of DCF. The income approach is most often used in the impairment evaluation of long-lived tangible assets, equity method investments, goodwill, and intangible assets. Where the use of market observable data is limited or not available for certain input assumptions, the Company develops its own estimates using a variety of techniques such as regression analysis and extrapolations. Depending on the complexity of a valuation, an independent valuation firm may be engaged to assist management in the valuation process. For nonrecurring measurements derived using the market approach, recent market transactions involving the sale of identical or similar assets are considered. The use of this approach is limited because it is often difficult to identify sale transactions of identical or similar assets. This approach is used in impairment evaluations of certain intangible assets. Otherwise, it is used to corroborate the fair value determined under the income approach. For nonrecurring measurements derived using the cost approach, fair value is typically based upon a replacement cost approach. This approach involves a considerable amount of judgment, which is why its use is limited to the measurement of long-lived tangible assets. Like the market approach, this approach is also used to corroborate the fair value determined under the income approach. Fair Value Considerations — In determining fair value, the Company considers the source of observable market data inputs, liquidity of the instrument, the credit risk of the counterparty and the risk of the Company's or its counterparty's nonperformance. The conditions and criteria used to assess these factors are: Sources of market assumptions — The Company derives most of its market assumptions from market efficient data sources (e.g., Bloomberg and Reuters). To determine fair value, where market data is not readily available, management uses comparable market sources and empirical evidence to develop its own estimates of market assumptions. Market liquidity — The Company evaluates market liquidity based on whether the financial or physical instrument, or the underlying asset, is traded in an active or inactive market. An active market exists if the prices are fully transparent to market participants, can be measured by market bid and ask quotes, the market has a relatively large proportion of trading volume as compared to the Company's current trading volume and the market has a significant number of market participants that will allow the market to rapidly absorb the quantity of assets traded without significantly affecting the market price. Another factor the Company considers when determining whether a market is active or inactive is the presence of government or regulatory controls over pricing that could make it difficult to establish a market-based price when entering into a transaction. Nonperformance risk — Nonperformance risk refers to the risk that an obligation will not be fulfilled and affects the value at which a liability is transferred or an asset is sold. Nonperformance risk includes, but may not be limited to, the Company or its counterparty's credit and settlement risk. Nonperformance risk adjustments are dependent on credit spreads, letters of credit, collateral, other arrangements available and the nature of master netting arrangements. The Company is party to various interest rate swaps and options; foreign currency options and forwards; and derivatives and embedded derivatives, which subject the Company to nonperformance risk. The financial and physical instruments held at the subsidiary level are generally non-recourse to the Parent Company. Nonperformance risk on the investments held by the Company is incorporated in the fair value derived from quoted market data to mark the investments to fair value. Recurring Measurements — The following table presents, by level within the fair value hierarchy as described in Note 1 — General and Summary of Significant Accounting Policies , the Company's financial assets and liabilities that were measured at fair value on a recurring basis as of the dates indicated (in millions). For the Company's investments in marketable debt securities, the security classes presented were determined based on the nature and risk of the security and are consistent with how the Company manages, monitors and measures its marketable securities: December 31, 2019 December 31, 2018 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets DEBT SECURITIES: Available-for-sale: Unsecured debentures $ — $ — $ — $ — $ — $ 5 $ — $ 5 Certificates of deposit — 326 — 326 — 243 — 243 Total debt securities — 326 — 326 — 248 — 248 EQUITY SECURITIES: Mutual funds 22 61 — 83 19 49 — 68 Total equity securities 22 61 — 83 19 49 — 68 DERIVATIVES: Interest rate derivatives — 31 — 31 — 28 1 29 Cross-currency derivatives — — — — — 6 — 6 Foreign currency derivatives — 17 93 110 — 18 199 217 Commodity derivatives — 28 2 30 — 6 4 10 Total derivatives — assets — 76 95 171 — 58 204 262 TOTAL ASSETS $ 22 $ 463 $ 95 $ 580 $ 19 $ 355 $ 204 $ 578 Liabilities DERIVATIVES: Interest rate derivatives $ — $ 144 $ 184 $ 328 $ — $ 67 $ 141 $ 208 Cross-currency derivatives — 10 11 21 — 5 — 5 Foreign currency derivatives — 44 — 44 — 41 — 41 Commodity derivatives — 29 2 31 — 3 — 3 Total derivatives — liabilities — 227 197 424 — 116 141 257 TOTAL LIABILITIES $ — $ 227 $ 197 $ 424 $ — $ 116 $ 141 $ 257 As of December 31, 2019 , all AFS debt securities had stated maturities within one year. For the years ended December 31, 2019 , 2018 , and 2017 , no other-than-temporary impairment of marketable securities were recognized in earnings or Other Comprehensive Income (Loss) . Gains and losses on the sale of investments are determined using the specific-identification method. The following table presents gross proceeds from sale of AFS securities for the periods indicated (in millions): Year Ended December 31, 2019 2018 2017 Gross proceeds from sale of AFS securities (1) $ 663 $ 1,403 $ 1,398 _____________________________ (1) Proceeds in the year ended December 31, 2018 include $119 million of non-cash proceeds from non-convertible debentures at Guaimbê Solar Complex. See Note 26 —Acquisitions for further information. The following tables present a reconciliation of net derivative assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the years ended December 31, 2019 and 2018 (presented net by type of derivative in millions). Transfers between Level 3 and Level 2 principally result from changes in the significance of unobservable inputs used to calculate the credit valuation adjustment. Year Ended December 31, 2019 Interest Rate Cross Currency Foreign Currency Commodity Total Balance at January 1 $ (140 ) $ — $ 199 $ 4 $ 63 Total realized and unrealized gains (losses): Included in earnings (1 ) — (65 ) (2 ) (68 ) Included in other comprehensive income — derivative activity (97 ) — (17 ) — (114 ) Included in regulatory (assets) liabilities — — — (5 ) (5 ) Settlements 8 — (23 ) 2 (13 ) Transfers of assets/(liabilities), net into Level 3 (2 ) (11 ) — — (13 ) Transfers of (assets)/liabilities, net out of Level 3 48 — — — 48 Balance at December 31 $ (184 ) $ (11 ) $ 94 $ (1 ) $ (102 ) Total gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets and liabilities held at the end of the period $ — $ — $ (67 ) $ (2 ) $ (69 ) Year Ended December 31, 2018 Interest Rate Cross Currency Foreign Currency Commodity Total Balance at January 1 $ (151 ) $ — $ 240 $ 4 $ 93 Total realized and unrealized gains (losses): Included in earnings 22 — (14 ) (1 ) 7 Included in other comprehensive income — derivative activity (8 ) — — — (8 ) Included in regulatory (assets) liabilities — — — 5 5 Settlements 14 — (27 ) (4 ) (17 ) Transfers of assets/(liabilities), net into Level 3 (8 ) — — — (8 ) Transfers of (assets)/liabilities, net out of Level 3 (9 ) — — — (9 ) Balance at December 31 $ (140 ) $ — $ 199 $ 4 $ 63 Total gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets and liabilities held at the end of the period $ 29 $ — $ (41 ) $ (1 ) $ (13 ) The following table summarizes the significant unobservable inputs used for the Level 3 derivative assets (liabilities) as of December 31, 2019 (in millions, except range amounts): Type of Derivative Fair Value Unobservable Input Amount or Range (Weighted Average) Interest rate $ (184 ) Subsidiaries’ credit spreads 0.8% - 4.94% (3.7%) Cross-currency (11 ) Subsidiaries’ credit spreads 2.1 % Foreign currency: Argentine peso 94 Argentine peso to USD currency exchange rate after one year 61 - 495 (250) Commodity: Other (1 ) Total $ (102 ) For interest rate derivatives and foreign currency derivatives, increases (decreases) in the estimates of the Company's own credit spreads would decrease (increase) the value of the derivatives in a liability position. For foreign currency derivatives, increases (decreases) in the estimate of the above exchange rate would increase (decrease) the value of the derivative. Nonrecurring Measurements The Company measures fair value using the applicable fair value measurement guidance. Impairment expense is measured by comparing the fair value at the evaluation date to the then-latest available carrying amount. The following table summarizes our major categories of assets measured at fair value on a nonrecurring basis and their level within the fair value hierarchy (in millions): Year Ended December 31, 2019 Measurement Date Carrying Amount (1) Fair Value Pre-tax Loss Assets Level 1 Level 2 Level 3 Long-lived assets held and used: (2) Hawaii 12/31/2019 163 — — 103 60 Equity method investments: OPGC 12/31/2019 304 — — 212 92 Dispositions and held-for-sale businesses: (3) Kilroot and Ballylumford 04/12/2019 232 — 118 — 115 Year Ended December 31, 2018 Measurement Date Carrying Amount (1) Fair Value Pre-tax Loss Assets Level 1 Level 2 Level 3 Dispositions and held-for-sale businesses: (3) Shady Point 12/31/2018 211 — — 30 157 Long-lived assets held and used: (2) Nejapa 12/31/2018 $ 42 $ — $ — $ 5 $ 37 Equity method investments: Guacolda 10/01/2018 354 — — 209 144 Elsta 09/30/2018 19 — 16 — 3 _____________________________ (1) Represents the carrying values at the dates of initial measurement, before fair value adjustment. (2) See Note 22 — Asset Impairment Expense for further information. (3) Per the Company's policy, pre-tax loss is limited to the impairment of long-lived assets. Any additional loss will be recognized on completion of the sale. See Note 22 — Asset Impairment Expense and Note 25 — Held-for-Sale and Dispositions for further information. The following table summarizes the significant unobservable inputs used in the Level 3 measurement of long-lived assets held and used measured on a nonrecurring basis during the year ended December 31, 2019 (in millions, except range amounts): December 31, 2019 Fair Value Valuation Technique Unobservable Input Range (Weighted Average) Long-lived assets held and used: Hawaii $ 103 Discounted cash flow Annual revenue growth -11% to 1% (-6%) Pre-tax operating margin 5% to 35% (29%) Weighted-average cost of capital 5% to 15% Equity method investments: OPGC 212 Expected present value Annual dividend growth -27% to 41% (2%) Weighted-average cost of equity 9 % Total $ 315 Financial Instruments not Measured at Fair Value in the Consolidated Balance Sheets The following table presents (in millions) the carrying amount, fair value and fair value hierarchy of the Company's financial assets and liabilities that are not measured at fair value in the Consolidated Balance Sheets as of the periods indicated, but for which fair value is disclosed: December 31, 2019 Carrying Amount Fair Value Total Level 1 Level 2 Level 3 Assets: Accounts receivable — noncurrent (1) $ 98 $ 145 $ — $ — $ 145 Liabilities: Non-recourse debt 16,712 16,579 — 15,804 775 Recourse debt 3,396 3,529 — 3,529 — December 31, 2018 Carrying Amount Fair Value Total Level 1 Level 2 Level 3 Assets: Accounts receivable — noncurrent (1) $ 100 $ 209 $ — $ — $ 209 Liabilities: Non-recourse debt 15,645 16,225 — 13,524 2,701 Recourse debt 3,655 3,621 — 3,621 — _____________________________ (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 Consolidated Balance Sheets. The fair value and carrying amount of the Argentina receivables exclude VAT of $11 million and $16 million as of December 31, 2019 and 2018 , respectively.

Derivative Instruments and Hedg

Derivative Instruments and Hedging Activities	12 Months Ended
	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES	DERIVATIVE INSTRUMENTS AND HEDGING ACTIVITIES Volume of Activity — The following table presents the Company's maximum notional (in millions) over the remaining contractual period by type of derivative as of December 31, 2019 , regardless of whether they are in qualifying cash flow hedging relationships, and the dates through which the maturities for each type of derivative range: Interest Rate and Foreign Currency Derivatives Maximum Notional Translated to USD Latest Maturity Interest Rate (LIBOR and EURIBOR) $ 5,014 2044 Cross-currency swaps (Chilean Unidad de Fomento and Chilean peso) 260 2029 Foreign Currency: Argentine peso 30 2026 Chilean peso 163 2022 Colombian peso 139 2022 Brazilian real 5 2020 Others, primarily with weighted average remaining maturities of a year or less 90 2022 Commodity Derivatives Maximum Notional Latest Maturity Natural Gas (in MMBtu) 71 2020 Power (in MWhs) 1 2020 Coal (in Tons or Metric Tonnes) 10 2027 Accounting and Reporting — Assets and Liabilities — The following tables present the fair value of assets and liabilities related to the Company's derivative instruments as of the periods indicated (in millions): Fair Value December 31, 2019 December 31, 2018 Assets Designated Not Designated Total Designated Not Designated Total Interest rate derivatives $ 31 $ — $ 31 $ 29 $ — $ 29 Cross-currency derivatives — — — 6 — 6 Foreign currency derivatives 31 79 110 — 217 217 Commodity derivatives — 30 30 — 10 10 Total assets $ 62 $ 109 $ 171 $ 35 $ 227 $ 262 Liabilities Interest rate derivatives $ 323 $ 5 $ 328 $ 205 $ 3 $ 208 Cross-currency derivatives 21 — 21 5 — 5 Foreign currency derivatives 22 22 44 28 13 41 Commodity derivatives 2 29 31 — 3 3 Total liabilities $ 368 $ 56 $ 424 $ 238 $ 19 $ 257 December 31, 2019 December 31, 2018 Fair Value Assets Liabilities Assets Liabilities Current $ 72 $ 126 $ 75 $ 51 Noncurrent 99 298 187 206 Total $ 171 $ 424 $ 262 $ 257 As of December 31, 2019 and 2018 , all derivative instruments subject to credit risk-related contingent features were in an asset position. Earnings and Other Comprehensive Income (Loss) — The following table presents the pre-tax gains (losses) recognized in AOCL and earnings related to all derivative instruments for the periods indicated (in millions): Years Ended December 31, 2019 2018 2017 Cash flow hedges Gains (losses) recognized in AOCL Interest rate derivatives $ (290 ) $ (16 ) $ (66 ) Cross-currency derivatives (26 ) (26 ) 31 Foreign currency derivatives (23 ) (52 ) (5 ) Commodity derivatives — — 18 Total $ (339 ) $ (94 ) $ (22 ) Gains (losses) reclassified from AOCL to earnings Interest rate derivatives $ (28 ) $ (52 ) $ (82 ) Cross-currency derivatives (12 ) (43 ) 34 Foreign currency derivatives (13 ) (16 ) (20 ) Commodity derivatives (1 ) (6 ) 17 Total $ (54 ) $ (117 ) $ (51 ) Loss reclassified from AOCL to earnings due to discontinuance of hedge accounting (1) $ (2 ) $ — $ (13 ) Gain (losses) recognized in earnings related to Ineffective portion of cash flow hedges $ — $ (7 ) $ 3 Not designated as hedging instruments: Foreign currency derivatives (46 ) 148 1 Commodity derivatives and other (6 ) 25 14 Total $ (52 ) $ 173 $ 15 _____________________________ (1) Cash flow hedge was discontinued on a cross-currency swap in 2019 because the underlying debt was prepaid. Cash flow hedge was discontinued in 2017 because it was probable the forecasted transaction will not occur. AOCL is expected to decrease pre-tax income from continuing operations for the twelve months ended December 31, 2020 by $73 million , primarily due to interest rate derivatives.

Financing Receivables

Financing Receivables	12 Months Ended
	Dec. 31, 2019
Receivables [Abstract]
FINANCING RECEIVABLES	FINANCING RECEIVABLES Receivables with contractual maturities of greater than one year are considered financing receivables. The Company's financing receivables are primarily related to amended agreements or government resolutions that are due from CAMMESA, the administrator of the wholesale electricity market in Argentina. The following table presents financing receivables by country as of the dates indicated (in millions): December 31, 2019 2018 Argentina $ 64 $ 93 Chile 33 — Other 12 23 Total $ 109 $ 116 Argentina Collection of the principal and interest on these receivables is subject to various business risks and uncertainties, including, but not limited to, the continued operation of power plants which generate cash for payments of these receivables, regulatory changes that could impact the timing and amount of collections, and economic conditions in Argentina. The Company monitors these risks, including the credit ratings of the Argentine government, on a quarterly basis to assess the collectability of these receivables. The Company accrues interest on these receivables once the recognition criteria have been met. The Company's collection estimates are based on assumptions that it believes to be reasonable, but are inherently uncertain. Actual future cash flows could differ from these estimates. The decrease in Argentina financing receivables was primarily due to planned collections and unfavorable FX impacts. FONINVEMEM Agreements — As a result of energy market reforms in 2004 and 2010, AES Argentina entered into three agreements with the Argentine government, referred to as the FONINVEMEM Agreements, to contribute a portion of their accounts receivable into a fund for financing the construction of combined cycle and gas-fired plants. These receivables accrue interest and are collected in monthly installments over 10 years once the related plant begins operations. In addition, AES Argentina receives an ownership interest in these newly built plants once the receivables have been fully repaid. The FONINVEMEM receivables are denominated in Argentine pesos, but indexed to USD, which represents a foreign currency derivative. Due to differences between spot rates, used to remeasure the receivables, and discounted forward rates, used to value the foreign currency derivative, these two items will not perfectly offset over the life of the receivable. Once settled, the foreign currency derivative will offset the accumulated unrealized foreign currency losses resulting from the devaluation of the FONINVEMEM receivable. As of December 31, 2019 and 2018 , the amount of the foreign currency-related derivative assets associated with the FONINVEMEM financing receivables that were excluded from the table above had a fair value of $94 million and $199 million , respectively. The receivables under the FONINVEMEM Agreements have been actively collected since the related plants commenced operations in 2010 and 2016. In assessing the collectability of the receivables under these agreements, the Company also considers historic collection evidence in accordance with the agreements. Other Agreements — Other agreements primarily consist of resolutions passed by the Argentine government in which AES Argentina will receive compensation for investments in new generation plants and technologies. The timing of collections depend on corresponding agreements and collectability of these receivables are assessed on an ongoing basis. Chile AES Gener has recorded noncurrent receivables pertaining to revenues recognized on regulated energy contracts that were impacted by the Stabilization Fund created by the Chilean government in October 2019. Historically, the government updated the prices for these contracts every six months to reflect the indexation the contracts have to exchange rates and commodities prices. The Stabilization Fund does not allow the pass-through of these contractual indexation updates to customers beyond the pricing in effect at July 1, 2019, until new lower-cost renewable contracts are incorporated into pricing in 2023. Consequently, costs incurred in excess of the July 1, 2019 price will be accumulated and borne by generators. It is expected that these noncurrent receivables will be collected prior to December 31, 2027.

Investments In and Advances To

Investments In and Advances To Affiliates	12 Months Ended
	Dec. 31, 2019
Equity Method Investments and Joint Ventures [Abstract]
INVESTMENTS IN AND ADVANCES TO AFFILIATES	INVESTMENTS IN AND ADVANCES TO AFFILIATES The following table summarizes the relevant effective equity ownership interest and carrying values for the Company's investments accounted for under the equity method as of the periods indicated: December 31, 2019 2018 2019 2018 Affiliate Country Carrying Value (in millions) Ownership Interest % sPower United States $ 442 $ 515 50 % 50 % OPGC India 212 293 49 % 49 % Guacolda (1) Chile 74 209 33 % 33 % Uplight (2) United States 91 33 32 % 63 % Eólica Mesa La Paz (3) Mexico 66 8 50 % 50 % Gas Natural del Este Dominican Republic 48 — 43 % — % Barry (4) United Kingdom — — 100 % 100 % Other affiliates (5) Various 33 56 Total $ 966 $ 1,114 _____________________________ (1) The Company's ownership in Guacolda is held through AES Gener, a 67% -owned consolidated subsidiary. AES Gener owns 50% of Guacolda, resulting in an AES effective ownership in Guacolda of 33% . (2) Simple Energy merged with Tendril on July 1, 2019 to form Uplight. Prior year information reported relates to Simple Energy. (3) The Eólica Mesa La Paz project received funding throughout 2019 and began operations during December 2019. (4) Represents a VIE in which the Company holds a variable interest, but is not the primary beneficiary. (5) Includes Bosforo, Fluence, Distributed Energy equity method investments, and others. OPGC — In December 2019, an other-than-temporary impairment was identified at OPGC primarily due to the estimated market value of the Company's investment and other negative developments impacting future expected cash flows at the investee . A calculation of the fair value of the Company’s investment in OPGC was required to evaluate whether there was a loss in the carrying value of the investment. Based on management’s estimate of fair value of $212 million , the Company recognized an other-than-temporary impairment of $92 million in Other non-operating expense . The OPGC equity method investment is reported in the Eurasia SBU reportable segment. Guacolda — In October 2019, Guacolda management reviewed the recoverability of the Guacolda asset group and determined the undiscounted cash flows did not exceed the carrying amount. Guacolda recognized a long-lived asset impairment at the investee level, which negatively impacted the Company's Net equity in earnings (losses) of affiliates by $158 million . The Guacolda equity method investment is reported in the South America SBU reportable segment. In October 2018, an other-than-temporary impairment was identified at Guacolda primarily as a result of increased renewable generation in Chile lowering energy prices, impacting management's ability to re-contract Guacolda's generation after expiration of existing PPAs. A calculation of the fair value of Gener's investment in Guacolda was required to evaluate whether there was a loss in the carrying value of the investment. Based on management's estimate of fair value of $209 million , the Company recognized an other-than-temporary impairment of $144 million in Other non-operating expense . Gas Natural del Este — In September 2019, AES Andres completed an agreement with Energas Group to establish a joint venture for the purpose of selling natural gas and related terminal services, storage, regasification, and transportation to customers in the Dominican Republic. Gas Natural del Este, a wholly-owned subsidiary of the joint venture, acquired the Eastern Pipeline development project from AES Andres for total consideration of $55 million , resulting in a gain of $2 million . The transaction was considered a contribution of a nonfinancial asset in exchange for a noncontrolling interest in the joint venture. As the Company does not control the joint venture, it is accounted for as an equity method investment and is reported in the MCAC SBU reportable segment. Simple Energy — On July 1, 2019, Simple Energy merged with Tendril, a previously unrelated party, to form Uplight, a new company that offers a comprehensive platform for utility customer engagement. As part of this merger, the Company contributed its ownership interest in Simple Energy and $53 million of cash in exchange for an ownership interest in the merged company. This transaction resulted in a gain on sale of $12 million and a total investment in Uplight of $98 million . As the Company does not control Uplight, it is accounted for as an equity method investment and reported as part of Corporate and Other. In April 2018, the Company invested $35 million in Simple Energy, a provider of utility-branded marketplaces and omni-channel instant rebates, accounted for as an equity method investment. sPower — In April 2019, the Company closed on the sale of approximately 48% of its interest in a portfolio of sPower’s operating assets for $173 million , subject to customary purchase price adjustments, of which $58 million was retained at sPower to pay down debt. This sale resulted in a pre-tax gain on sale of business interests of $28 million. After the sale, the Company’s ownership interest in this portfolio of sPower’s operating assets decreased from 50% to approximately 26% . The sPower equity method investment is reported in the US and Utilities SBU reportable segment. Distributed Energy — In December 2018, Distributed Energy acquired the remaining equity interest in a partnership holding various solar projects for consideration of $23 million . This transaction resulted in a loss of $5 million , reported in Other expense in the Consolidated Statement of Operations. The projects, previously recorded as equity method investments, have been consolidated. See Note 26 —Acquisitions for further discussion. Fluence — On January 1, 2018, Siemens and AES closed on the creation of the Fluence joint venture with each party holding a 50% ownership interest. The Company contributed $7 million in cash and $20 million in non-cash assets from the AES Advancion energy storage development business as consideration for the transaction, and received an equity interest in Fluence with a fair value of $50 million . See Note 25 —Held-for-Sale and Dispositions for further discussion. Fluence is a global energy storage technology and services company. As the Company does not control Fluence, the investment is accounted for as an equity method investment. The Fluence equity method investment is reported as part of Corporate and Other. AES Barry Ltd. — The Company holds a 100% ownership interest in AES Barry Ltd. ("Barry"), a dormant entity in the U.K. that disposed of its generation and other operating assets. Due to a debt agreement, no material financial or operating decisions can be made without the banks' consent, and the Company does not control Barry. As of December 31, 2019 and 2018 , other long-term liabilities included $44 million and $43 million related to this debt agreement. Summarized Financial Information — The following tables summarize financial information of the Company's 50%-or-less-owned affiliates and majority-owned unconsolidated subsidiaries that are accounted for using the equity method (in millions): 50%-or-less Owned Affiliates Majority-Owned Unconsolidated Subsidiaries Years ended December 31, 2019 2018 2017 2019 2018 2017 Revenue $ 1,122 $ 962 $ 762 $ 49 $ 40 $ 16 Operating margin (loss) 124 135 165 (5 ) 3 5 Net income (loss) (724 ) 14 72 (7 ) (3 ) (15 ) December 31, 2019 2018 2019 2018 Current assets $ 831 $ 558 $ 166 $ 89 Noncurrent assets 7,220 5,918 982 41 Current liabilities 1,271 546 141 35 Noncurrent liabilities 3,966 3,309 1,052 122 Stockholders' equity 2,814 2,622 (45 ) (27 ) At December 31, 2019 , retained earnings included $14 million related to the undistributed earnings of the Company's 50%-or-less owned affiliates. Distributions received from these affiliates were $23 million , $83 million , and $69 million for the years ended December 31, 2019 , 2018 , and 2017 , respectively. As of December 31, 2019 , the underlying equity in the net assets of our equity affiliates exceeded the aggregate carrying amount of our investments in equity affiliates by $225 million .

Goodwill and Other Intangible A

Goodwill and Other Intangible Assets	12 Months Ended
	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
GOODWILL AND OTHER INTANGIBLE ASSETS	GOODWILL AND OTHER INTANGIBLE ASSETS Goodwill — The following table summarizes the carrying amount of goodwill by reportable segment for the years ended December 31, 2019 and 2018 (in millions): US and Utilities South America MCAC Eurasia Total Balance as of December 31, 2018 Goodwill $ 2,786 $ 868 $ 16 $ 122 $ 3,792 Accumulated impairment losses (2,611 ) — — (122 ) (2,733 ) Net balance 175 868 16 — 1,059 Balance as of December 31, 2019 Goodwill 2,786 868 16 — (1) 3,670 Accumulated impairment losses (2,611 ) — — — (1) (2,611 ) Net balance $ 175 $ 868 $ 16 $ — $ 1,059 _____________________________ (1) Goodwill and accumulated impairment losses at the Eurasia reportable segment were reduced by $122 million due to the sale of Kilroot in 2019 . Other Intangible Assets — The following table summarizes the balances comprising Other intangible assets in the accompanying Consolidated Balance Sheets (in millions) as of the periods indicated: December 31, 2019 December 31, 2018 Gross Balance Accumulated Amortization Net Balance Gross Balance Accumulated Amortization Net Balance Subject to Amortization Internal-use software $ 367 $ (228 ) $ 139 $ 467 $ (344 ) $ 123 Contracts 134 (29 ) 105 137 (24 ) 113 Project development rights 100 (1 ) 99 93 (1 ) 92 Contractual payment rights (1) — — — 57 (44 ) 13 Emissions allowances (2) 24 — 24 15 — 15 Other (3) 82 (49 ) 33 78 (44 ) 34 Subtotal 707 (307 ) 400 847 (457 ) 390 Indefinite-Lived Intangible Assets Land use rights 21 — 21 21 — 21 Water rights 20 — 20 20 — 20 Transmission rights 23 — 23 — — — Other 5 — 5 5 — 5 Subtotal 69 — 69 46 — 46 Total $ 776 $ (307 ) $ 469 $ 893 $ (457 ) $ 436 _____________________________ (1) Represent legal rights to receive system reliability payments from the regulator. (2) Acquired or purchased emissions allowances are finite-lived intangible assets that are expensed when utilized and included in net income for the year. (3) Includes management rights, sales concessions, renewable energy credits and incentives, and other individually insignificant intangible assets. The following tables summarize other intangible assets acquired during the periods indicated (in millions): December 31, 2019 Amount Subject to Amortization/Indefinite-Lived Weighted Average Amortization Period (in years) Amortization Method Internal-use software $ 61 Subject to Amortization 5 Straight-line Contracts 2 Subject to Amortization 35 Straight-line Project development rights 8 Subject to Amortization 29 Straight-line Emissions allowances 22 Subject to Amortization Various As utilized Transmission rights 23 Indefinite-Lived N/A N/A Other 5 Various N/A N/A Total $ 121 December 31, 2018 Amount Subject to Amortization/Indefinite-Lived Weighted Average Amortization Period (in years) Amortization Method Internal-use software $ 67 Subject to Amortization 6 Straight-line Contracts 50 Subject to Amortization 24 Straight-line Project development rights 35 Subject to Amortization 23 Straight-line Emissions allowances 16 Subject to Amortization Various As utilized Other 11 Various N/A N/A Total $ 179 The following table summarizes the estimated amortization expense by intangible asset category for 2020 through 2024 : (in millions) 2020 2021 2022 2023 2024 Internal-use software $ 34 $ 31 $ 22 $ 17 $ 15 Contracts 4 4 4 4 4 Other 6 5 5 5 5 Total $ 44 $ 40 $ 31 $ 26 $ 24 Intangible asset amortization expense was $45 million , $47 million and $34 million for the years ended December 31, 2019 , 2018 and 2017 , respectively.

Regulatory Assets and Liabiliti

Regulatory Assets and Liabilities	12 Months Ended
	Dec. 31, 2019
Regulated Operations [Abstract]
REGULATORY ASSETS AND LIABILITIES	REGULATORY ASSETS AND LIABILITIES The Company has recorded regulatory assets and liabilities (in millions) that it expects to pass through to its customers in accordance with, and subject to, regulatory provisions as follows: December 31, 2019 2018 Recovery/Refund Period Regulatory assets Current regulatory assets: El Salvador energy pass through costs recovery $ 56 $ 87 Quarterly Other 57 69 1 year Total current regulatory assets 113 156 Noncurrent regulatory assets: IPL and DPL defined benefit pension obligations (1) 262 283 Various IPL deferred Midwest ISO costs 75 88 9 years IPL environmental costs 85 89 Various Other 108 87 Various Total noncurrent regulatory assets 530 547 Total regulatory assets $ 643 $ 703 Regulatory liabilities Current regulatory liabilities: Overcollection of costs to be passed back to customers $ 80 $ 83 1 year Other 1 3 Various Total current regulatory liabilities 81 86 Noncurrent regulatory liabilities: IPL and DPL accrued costs of removal and AROs 863 847 Over life of assets IPL and DPL income taxes payable to customers through rates 209 246 Various Other 18 53 Various Total noncurrent regulatory liabilities 1,090 1,146 Total regulatory liabilities $ 1,171 $ 1,232 _____________________________ (1) Past expenditures on which the Company earns a rate of return . Our regulatory assets and current regulatory liabilities primarily consist of under or overcollection of costs that are generally non-controllable, such as purchased electricity, energy transmission, fuel costs, and other sector costs. These costs are recoverable or refundable as defined by the laws and regulations in our markets. Our regulatory assets also include defined pension and postretirement benefit obligations equal to the previously unrecognized actuarial gains and losses and prior service costs that are expected to be recovered through future rates. Other current and noncurrent regulatory assets primarily consist of: • Undercollections on rate riders such as wholesale margin sharing and MISO costs at IPL and storm costs at DPL; • Unamortized premiums reacquired or redeemed on long-term debt at IPL and DPL, which are amortized over the lives of the original issuances; and • OVEC costs at DPL. Our noncurrent regulatory liabilities primarily consist of obligations for removal costs which do not have an associated legal retirement obligation. Our noncurrent regulatory liabilities also include deferred income taxes related to differences in income recognition between tax laws and accounting methods, which will be passed through to our regulated customers via a decrease in future retail rates. See Note 23 — Income Taxes for further information. In the accompanying Consolidated Balance Sheets the current regulatory assets and liabilities are reflected in Other current assets and Accrued and other liabilities , respectively, and the noncurrent regulatory assets and liabilities are reflected in Other noncurrent assets and Other noncurrent liabilities , respectively. All of the regulatory assets and liabilities as of December 31, 2019 and December 31, 2018 related to the US and Utilities SBU.

Debt

Debt	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
DEBT	DEBT NON-RECOURSE DEBT — The following table summarizes the carrying amount and terms of non-recourse debt at our subsidiaries as of the periods indicated (in millions): NON-RECOURSE DEBT Weighted Average Interest Rate Maturity December 31, 2019 2018 Variable Rate: Bank loans 4.25% 2020 – 2050 $ 3,389 $ 2,600 Notes and bonds 3.99% 2020 – 2030 1,056 821 Debt to (or guaranteed by) multilateral, export credit agencies or development banks (1) 1.73% 2023 – 2033 460 3,292 Fixed Rate: Bank loans 5.19% 2020 – 2040 2,900 1,684 Notes and bonds 5.51% 2020 – 2079 8,098 7,346 Debt to (or guaranteed by) multilateral, export credit agencies or development banks (1) 6.09% 2023 – 2029 1,110 246 Other 4.20% 2061 17 24 Unamortized (discount) premium & debt issuance (costs), net (318 ) (368 ) Subtotal $ 16,712 $ 15,645 Less: Current maturities (2) (1,865 ) (1,659 ) Noncurrent maturities (2) $ 14,847 $ 13,986 _____________________________ (1) Multilateral loans include loans funded and guaranteed by bilaterals, multilaterals, development banks and other similar institutions. (2) Excludes $3 million (current) and $67 million (noncurrent) finance lease liabilities included in the respective non-recourse debt line items on the Consolidated Balance Sheet as of December 31, 2019 . See Note 14 — Leases for further information. The interest rate on variable rate debt represents the total of a variable component that is based on changes in an interest rate index and of a fixed component. The Company has interest rate swaps and option agreements that economically fix the variable component of the interest rates on the portion of the variable rate debt being hedged in an aggregate notional principal amount of approximately $1.8 billion on non-recourse debt outstanding at December 31, 2019 . Non-recourse debt as of December 31, 2019 is scheduled to reach maturity as shown below (in millions): December 31, Annual Maturities 2020 $ 1,883 2021 1,648 2022 999 2023 1,125 2024 1,180 Thereafter 10,195 Unamortized (discount) premium & debt issuance (costs), net (318 ) Total $ 16,712 As of December 31, 2019 , AES subsidiaries with facilities under construction had a total of approximately $470 million of committed but unused credit facilities available to fund construction and other related costs. Excluding these facilities under construction, AES subsidiaries had approximately $1.1 billion in various unused committed credit lines to support their working capital, debt service reserves and other business needs. These credit lines can be used for borrowings, letters of credit, or a combination of these uses. Significant transactions — During the year ended December 31, 2019 , the Company's subsidiaries had the following significant debt transactions: Subsidiary Transaction Period Issuances Repayments Gain (Loss) on Extinguishment of Debt Southland (1) Q1, Q2, Q3, Q4 $ 930 $ (210 ) $ (1 ) Gener Q1, Q2, Q4 1,000 (697 ) (29 ) DPL (2) Q2 825 (835 ) (43 ) Tietê Q2 561 (533 ) (3 ) Mong Duong (3) Q3 1,120 (1,081 ) (31 ) Colon Q3 610 (579 ) (28 ) Cochrane Q4 875 (833 ) (24 ) TEGTEP Q4 280 (248 ) (1 ) _____________________________ (1) Issuances relate to the June 2017 long-term non-recourse debt financing to fund the Southland re-powering construction projects, a non-recourse bridge loan in September 2019, and long-term non-recourse debt financing issued in December 2019 to settle the bridge loan. (2) Includes transactions at DPL and its subsidiary, DP&L. (3) Non-cash transaction via an equity affiliate. See below for further information. Cochrane — In November 2019, Cochrane issued $430 million aggregate principal of 5.50% senior unsecured notes due in 2027 and entered into a $445 million 6.25% senior secured facility agreement due in 2034 . The net proceeds from the issuance and draw down were used to prepay the outstanding principal of $833 million under its variable rate notes due in 2030 . As a result of these transactions, the Company recognized a loss on extinguishment of debt of $24 million . Gener — In March 2019, Gener issued $550 million aggregate principal of 7.125% senior unsecured notes due in 2079 . The net proceeds from the issuance were used to purchase via tender offer the outstanding principal of $450 million of its 8.375% senior unsecured notes due in 2073 . In October 2019, Gener issued $450 million aggregate principal of 6.35% senior unsecured notes due in 2079 . The net proceeds from the issuance were used to fund the acquisition of Los Cururos, purchase via tender offer $73 million and $55 million aggregate principal of its senior unsecured notes due in 2021 and 2025 , respectively, and prepay the remaining outstanding principal of $119 million of its senior unsecured notes due in 2021 . As a result of these transactions, the Company recognized a loss on extinguishment of debt of $29 million . Mong Duong — In August 2019, Mong Duong refinanced $1.1 billion aggregate principal of its existing senior secured notes due in 2029 with variable interest rates ranging from LIBOR + 2.25% to LIBOR + 4.15% in exchange for a fixed rate loan with a newly formed SPV, accounted for as an equity affiliate, due in 2029 with interest rates that vary from 4.41% to 7.18% . This refinancing was a non-cash transaction as the SPV acquired all of the outstanding rights and obligations of the original Mong Duong lenders. As a result of these transactions, the Company recognized a loss on extinguishment of debt of $31 million . DP&L — In June 2019, DP&L issued $425 million aggregate principal of 3.95% First Mortgage Bonds due in 2049 . The net proceeds from the issuance were used to prepay the outstanding principal of $435 million under its variable rate $445 million credit agreement due in 2022 . DPL — In April 2019, DPL issued $400 million aggregate principal of 4.35% senior unsecured notes due in 2029 . The net proceeds from the issuance were used to redeem $400 million of the $780 million aggregate principal outstanding of its 7.25% senior unsecured notes due in 2021 . As a result of these transactions, the Company recognized a loss on extinguishment of debt of $43 million . Non-Recourse Debt Covenants, Restrictions and Defaults — The terms of the Company's non-recourse debt include certain financial and nonfinancial covenants. These covenants are limited to subsidiary activity and vary among the subsidiaries. These covenants may include, but are not limited to, maintenance of certain reserves and financial ratios, minimum levels of working capital and limitations on incurring additional indebtedness. As of December 31, 2019 and 2018 , approximately $372 million and $627 million , respectively, of restricted cash was maintained in accordance with certain covenants of the non-recourse debt agreements, and these amounts were included within Restricted cash and Debt service reserves and other deposits in the accompanying Consolidated Balance Sheets. Various lender and governmental provisions restrict the ability of certain of the Company's subsidiaries to transfer their net assets to the Parent Company. Such restricted net assets of subsidiaries amounted to approximately $1.2 billion at December 31, 2019 . The following table summarizes the Company's subsidiary non-recourse debt in default (in millions) as of December 31, 2019 . Due to the defaults, these amounts are included in the current portion of non-recourse debt: Primary Nature December 31, 2019 Subsidiary Default Net Assets AES Puerto Rico Covenant $ 287 $ 151 AES Ilumina (Puerto Rico) Covenant 33 19 AES Jordan Solar (1) Covenant 5 4 Total $ 325 _____________________________ (1) Classified as current held-for-sale liability on the Consolidated Balance Sheets. The above defaults are not payment defaults. In Puerto Rico, the subsidiary non-recourse debt defaults were triggered by failure to comply with covenants or other requirements contained in the non-recourse debt documents due to the bankruptcy of the offtaker. The AES Corporation's recourse debt agreements include cross-default clauses that will trigger if a subsidiary or group of subsidiaries for which the non-recourse debt is in default provides 20% or more of the Parent Company's total cash distributions from businesses for the four most recently completed fiscal quarters. As of December 31, 2019 , the Company had no defaults which resulted in or were at risk of triggering a cross-default under the recourse debt of the Parent Company. In the event the Parent Company is not in compliance with the financial covenants of its senior secured revolving credit facility, restricted payments will be limited to regular quarterly shareholder dividends at the then-prevailing rate. Payment defaults and bankruptcy defaults would preclude the making of any restricted payments. RECOURSE DEBT — The following table summarizes the carrying amount and terms of recourse debt of the Company as of the periods indicated (in millions): Interest Rate Final Maturity December 31, 2019 December 31, 2018 Senior Unsecured Note 4.00% 2021 500 500 Senior Secured Term Loan LIBOR + 1.75% 2022 18 366 Senior Unsecured Note 4.875% 2023 613 713 Senior Unsecured Note 4.50% 2023 500 500 Drawings on secured credit facility LIBOR + 1.75% 2024 180 — Senior Unsecured Note 5.50% 2024 63 63 Senior Unsecured Note 5.50% 2025 544 544 Senior Unsecured Note 6.00% 2026 500 500 Senior Unsecured Note 5.125% 2027 500 500 Unamortized (discount) premium & debt issuance (costs), net (22 ) (31 ) Subtotal $ 3,396 $ 3,655 Less: Current maturities (5 ) (5 ) Noncurrent maturities $ 3,391 $ 3,650 The following table summarizes the principal amounts due under our recourse debt for the next five years and thereafter (in millions): December 31, Net Principal Amounts Due 2020 $ 5 2021 505 2022 8 2023 1,113 2024 243 Thereafter 1,544 Unamortized (discount) premium & debt issuance (costs), net (22 ) Total recourse debt $ 3,396 In September 2019, the Company prepaid $343 million aggregate principal of its LIBOR + 1.75% existing senior secured term loan due in 2022 and $100 million of its 4.875% senior unsecured notes due in 2023 . As a result of these transactions, the Company recognized a loss on extinguishment of debt of $5 million . In December 2018, the Company prepaid $150 million aggregate principal of its existing senior secured term loan due in 2022 . As a result of the transaction, the Company recognized a loss on extinguishment of debt of $1 million . In March 2018, the Company purchased via tender offers $671 million aggregate principal of its existing 5.50% senior unsecured notes due in 2024 and $29 million of its existing 5.50% senior unsecured notes due in 2025 . As a result of these transactions, the Company recognized a loss on extinguishment of debt of $44 million . In March 2018, the Company issued $500 million aggregate principal of 4.00% senior notes due in 2021 and $500 million of 4.50% senior notes due in 2023 . The Company used the proceeds from these issuances to purchase via tender offer in full the $228 million balance of its 8.00% senior notes due in 2020 and the $690 million balance of its 7.375% senior notes due in 2021 . As a result of these transactions, the Company recognized a loss on extinguishment of debt of $125 million . Recourse Debt Covenants and Guarantees — The Company's obligations under the senior secured credit facility and senior secured term loan are, subject to certain exceptions, secured by (i) all of the capital stock of domestic subsidiaries owned directly by the Company and 65% of the capital stock of certain foreign subsidiaries owned directly or indirectly by the Company; and (ii) certain intercompany receivables, certain intercompany notes and certain intercompany tax sharing agreements. The senior secured credit facility and senior secured term loan are subject to mandatory prepayment under certain circumstances, including the sale of certain assets. In such a situation, the net cash proceeds from the sale must be applied pro rata to repay the term loan, if any, using 60% of net cash proceeds, reduced to 50% when and if the Parent Company's recourse debt to cash flow ratio is less than 5:1 . The lenders have the option to waive their pro rata redemption. The senior secured credit facility contains customary covenants and restrictions on the Company's ability to engage in certain activities, including, but not limited to, limitations on other indebtedness, liens, investments and guarantees; limitations on restricted payments such as shareholder dividends and equity repurchases; restrictions on mergers and acquisitions, sales of assets, leases, transactions with affiliates and off-balance sheet or derivative arrangements; and other financial reporting requirements. The senior secured credit facility also contains financial covenants, evaluated quarterly, requiring the Company to maintain a minimum ratio of adjusted operating cash flow to interest charges on recourse debt of 2.5 times and a maximum ratio of recourse debt to adjusted operating cash flow of 5.75 times. The terms of the Company's senior unsecured notes and senior secured term loan contain certain covenants including limitations on the Company's ability to incur liens or enter into sale and leaseback transactions.

Commitments

Commitments	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
COMMITMENTS	COMMITMENTS The Company enters into long-term contracts for construction projects, maintenance and service, transmission of electricity, operations services and purchases of electricity and fuel. In general, these contracts are subject to variable quantities or prices and are terminable only in limited circumstances. The following table shows the future minimum commitments for continuing operations under these contracts as of December 31, 2019 for 2020 through 2024 and thereafter as well as actual purchases under these contracts for the years ended December 31, 2019 , 2018 , and 2017 (in millions): Actual purchases during the year ended December 31, Electricity Purchase Contracts Fuel Purchase Contracts Other Purchase Contracts 2017 $ 747 $ 1,619 $ 1,945 2018 827 1,838 1,671 2019 1,597 1,824 1,684 Future commitments for the year ending December 31, 2020 $ 699 $ 1,385 $ 1,551 2021 509 1,086 723 2022 406 756 538 2023 439 643 538 2024 459 568 529 Thereafter 5,110 2,601 1,745 Total $ 7,622 $ 7,039 $ 5,624

Contingencies

Contingencies	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
CONTINGENCIES	CONTINGENCIES Guarantees and Letters of Credit — In connection with certain project financings, acquisitions and dispositions, power purchases and other agreements, the Parent Company has expressly undertaken limited obligations and commitments, most of which will only be effective or will be terminated upon the occurrence of future events. In the normal course of business, the Parent Company has entered into various agreements, mainly guarantees and letters of credit, to provide financial or performance assurance to third parties on behalf of AES businesses. These agreements are entered into primarily to support or enhance the creditworthiness otherwise achieved by a business on a stand-alone basis, thereby facilitating the availability of sufficient credit to accomplish their intended business purposes. Most of the contingent obligations relate to future performance commitments which the Company or its businesses expect to fulfill within the normal course of business. The expiration dates of these guarantees vary from less than one year to more than 15 years . The following table summarizes the Parent Company's contingent contractual obligations as of December 31, 2019 . Amounts presented in the following table represent the Parent Company's current undiscounted exposure to guarantees and the range of maximum undiscounted potential exposure. The maximum exposure is not reduced by the amounts, if any, that could be recovered under the recourse or collateralization provisions in the guarantees. There were no obligations made by the Parent Company for the direct benefit of the lenders associated with the non-recourse debt of its businesses. Contingent Contractual Obligations Amount (in millions) Number of Agreements Maximum Exposure Range for Each Agreement (in millions) Guarantees and commitments $ 853 37 $0 — 157 Letters of credit under the unsecured credit facility 342 11 $1 — 296 Letters of credit under the senior secured credit facility 19 28 $0 — 4 Asset sale related indemnities (1) 12 1 $12 Total $ 1,226 77 _____________________________ (1) Excludes normal and customary representations and warranties in agreements for the sale of assets (including ownership in associated legal entities) where the associated risk is considered to be nominal. During the year ended December 31, 2019 , the Company paid letter of credit fees ranging from 1% to 3% per annum on the outstanding amounts of letters of credit. Environmental — The Company periodically reviews its obligations as they relate to compliance with environmental laws, including site restoration and remediation. For the periods ended December 31, 2019 and 2018 , the Company recognized liabilities of $4 million and $5 million for projected environmental remediation costs, respectively. Due to the uncertainties associated with environmental assessment and remediation activities, future costs of compliance or remediation could be higher or lower than the amount currently accrued. Moreover, where no liability has been recognized, it is reasonably possible that the Company may be required to incur remediation costs or make expenditures in amounts that could be material but could not be estimated as of December 31, 2019 . In aggregate, the Company estimates the range of potential losses related to environmental matters, where estimable, to be up to $15 million . The amounts considered reasonably possible do not include amounts accrued as discussed above. Litigation — The Company is involved in certain claims, suits and legal proceedings in the normal course of business. The Company accrues for litigation and claims when it is probable that a liability has been incurred and the amount of loss can be reasonably estimated. The Company has recognized aggregate liabilities for all claims of approximately $55 million and $53 million as of December 31, 2019 and 2018 , respectively. These amounts are reported on the Consolidated Balance Sheets within Accrued and other liabilities and Other noncurrent liabilities . A significant portion of these accrued liabilities relate to regulatory matters and commercial disputes in international jurisdictions. There can be no assurance that these accrued liabilities will be adequate to cover all existing and future claims or that we will have the liquidity to pay such claims as they arise. Where no accrued liability has been recognized, it is reasonably possible that some matters could be decided unfavorably to the Company and could require the Company to pay damages or make expenditures in amounts that could be material but could not be estimated as of December 31, 2019 . The material contingencies where a loss is reasonably possible primarily include disputes with offtakers, suppliers and EPC contractors; alleged breaches of contract; alleged violation of laws and regulations; income tax and non-income tax matters with tax authorities; and regulatory matters. In aggregate, the Company estimates the range of potential losses, where estimable, related to these reasonably possible material contingencies to be between $75 million and $503 million . The amounts considered reasonably possible do not include amounts accrued, as discussed above. These material contingencies do not include income tax-related contingencies which are considered part of our uncertain tax positions.

Leases Leases

Leases Leases	12 Months Ended
	Dec. 31, 2019
Leases [Abstract]
Lessee, Operating Leases [Text Block]	LESSEE — Right-of-use assets are long-term by nature. The following table summarizes the amounts recognized on the Consolidated Balance Sheets related to lease asset and liability balances as of the period indicated (in millions): Consolidated Balance Sheet Classification December 31, 2019 Assets Right-of-use assets — finance leases Electric generation, distribution assets and other $ 67 Right-of-use assets — operating leases Other noncurrent assets 248 Total right-of-use assets $ 315 Liabilities Finance lease liabilities (current) Non-recourse debt (current liabilities) $ 3 Finance lease liabilities (noncurrent) Non-recourse debt (noncurrent liabilities) 67 Total finance lease liabilities 70 Operating lease liabilities (current) Accrued and other liabilities 16 Operating lease liabilities (noncurrent) Other noncurrent liabilities 261 Total operating lease liabilities 277 Total lease liabilities $ 347 The following table summarizes supplemental balance sheet information related to leases as of the period indicated: Lease Term and Discount Rate December 31, 2019 Weighted-average remaining lease term — finance leases 32 years Weighted-average remaining lease term — operating leases 23 years Weighted-average discount rate — finance leases 4.99 % Weighted-average discount rate — operating leases 6.99 % The following table summarizes the components of lease expense recognized in Cost of Sales on the Consolidated Statements of Operations for the year ended (in millions): Components of Lease Cost December 31, 2019 Operating lease cost $ 46 Finance lease cost: Amortization of right-of-use assets 2 Interest on lease liabilities 2 Short-term lease costs 38 Variable lease cost 1 Total lease cost $ 89 Operating cash outflows from operating leases included in the measurement of lease liabilities were $48 million for the twelve months ended December 31, 2019 . The following table shows the future lease payments under operating and finance leases for continuing operations together with the present value of the net lease payments as of December 31, 2019 for 2020 through 2024 and thereafter (in millions): Maturity of Lease Liabilities Finance Leases Operating Leases 2020 $ 4 $ 29 2021 4 27 2022 4 27 2023 4 26 2024 4 26 Thereafter 119 460 Total 139 595 Less: Imputed interest (69 ) (318 ) Present value of lease payments $ 70 $ 277
Lessor, Operating Leases [Text Block]	LESSOR — Lease revenue included in the Consolidated Statements of Operations was $600 million for the twelve months ended December 31, 2019 , of which $130 million was related to variable lease payments. Underlying gross assets and accumulated depreciation of operating leases included in Property, Plant and Equipment on the Consolidated Balance Sheets were $2.9 billion and $707 million , respectively, as of December 31, 2019 . The option to extend or terminate a lease is based on customary early termination provisions in the contract, such as payment defaults, bankruptcy, and lack of performance on energy delivery. The Company has not recognized any early terminations as of December 31, 2019 . Certain leases may provide for variable lease payments based on usage or index-based (e.g., the U.S. Consumer Price Index) adjustments to lease payments. The following table shows the future lease receipts as of December 31, 2019 for 2020 through 2024 and thereafter (in millions): Future Cash Receipts for Sales-Type Leases Operating Leases 2020 $ 2 $ 504 2021 2 474 2022 2 459 2023 2 395 2024 2 396 Thereafter 38 1,463 Total 48 $ 3,691 Less: Imputed interest (26 ) Present value of total lease receipts $ 22 The Company is constructing and operating projects that pair battery energy storage systems ("BESS") with solar energy systems, which allows the project more flexibility on when to provide energy to the grid. The Company will enter into PPAs for the full output of the facility that allow customers the ability to determine when to charge and discharge the BESS. These arrangements include both lease and non-lease elements under ASC 842, with the BESS component constituting a sales-type lease. Upon commencement of the lease, the book value of the leased asset is removed from the balance sheet and a net investment in sales-type lease is recognized based on the present value of fixed payments under the contract and the residual value of the underlying asset. Due to the variable nature of lease payments under these contracts, the Company recorded losses at commencement of sales-type leases of $36 million for the year ended December 31, 2019 . These amounts are recognized in Other expense in the Consolidated Statement of Operations. See Note 21 — Other Income and Expense for further information.

Benefit Plans

Benefit Plans	12 Months Ended
	Dec. 31, 2019
Retirement Benefits [Abstract]
BENEFIT PLANS	BENEFIT PLANS Defined Contribution Plan — The Company sponsors four defined contribution plans ("the DC Plans"). Two plans cover U.S. non-union employees; one for Parent Company and certain US and Utilities SBU business employees, and one for DPL employees. The remaining two plans include union and non-union employees at IPL and union employees at DPL. The DC Plans are qualified under section 401 of the Internal Revenue Code. Most U.S. employees of the Company are eligible to participate in the appropriate plan except for those employees who are covered by a collective bargaining agreement, unless such agreement specifically provides that the employee is considered an eligible employee under a plan. Within the DC Plans, the Company provides matching contributions in addition to other non-matching contributions. Participants are fully vested in their own contributions. The Company's contributions vest over various time periods ranging from immediate up to five years . For the years ended December 31, 2019 , 2018 and 2017 , costs for defined contribution plans were approximately $19 million , $21 million and $23 million , respectively. Defined Benefit Plans — Certain of the Company's subsidiaries have defined benefit pension plans covering substantially all of their respective employees ("the DB Plans"). Pension benefits are based on years of credited service, age of the participant, and average earnings. Of the 28 active DB Plans as of December 31, 2019 , five are at U.S. subsidiaries and the remaining plans are at foreign subsidiaries . The following table reconciles the Company's funded status, both domestic and foreign, as of the periods indicated (in millions): 2019 2018 U.S. Foreign U.S. Foreign CHANGE IN PROJECTED BENEFIT OBLIGATION: Benefit obligation as of January 1 $ 1,118 $ 417 $ 1,257 $ 470 Service cost 11 8 15 12 Interest cost 44 19 40 22 Employee contributions — — — 1 Plan amendments — — 10 — Plan settlements — — — (21 ) Benefits paid (65 ) (9 ) (105 ) (17 ) Plan combinations — — — (4 ) Divestitures — (244 ) — — Actuarial (gain) loss 134 37 (99 ) (8 ) Effect of foreign currency exchange rate changes — (4 ) — (38 ) Benefit obligation as of December 31 $ 1,242 $ 224 $ 1,118 $ 417 CHANGE IN PLAN ASSETS: Fair value of plan assets as of January 1 $ 1,026 $ 410 $ 1,127 $ 455 Actual return on plan assets 185 19 (35 ) 6 Employer contributions 8 5 39 21 Employee contributions — — — 1 Plan settlements — — — (21 ) Benefits paid (65 ) (9 ) (105 ) (17 ) Divestitures — (296 ) — — Effect of foreign currency exchange rate changes — — — (35 ) Fair value of plan assets as of December 31 $ 1,154 $ 129 $ 1,026 $ 410 RECONCILIATION OF FUNDED STATUS Funded status as of December 31 $ (88 ) $ (95 ) $ (92 ) $ (7 ) The following table summarizes the amounts recognized on the Consolidated Balance Sheets related to the funded status of the DB Plans, both domestic and foreign, as of the periods indicated (in millions): December 31, 2019 2018 Amounts Recognized on the Consolidated Balance Sheets U.S. Foreign U.S. Foreign Noncurrent assets $ — $ — $ — $ 64 Accrued benefit liability—current — (7 ) — (6 ) Accrued benefit liability—noncurrent (88 ) (88 ) (92 ) (65 ) Net amount recognized at end of year $ (88 ) $ (95 ) $ (92 ) $ (7 ) The following table summarizes the Company's U.S. and foreign accumulated benefit obligation as of the periods indicated (in millions): December 31, 2019 2018 U.S. Foreign U.S. Foreign Accumulated Benefit Obligation $ 1,224 $ 188 $ 1,101 $ 376 Information for pension plans with an accumulated benefit obligation in excess of plan assets: Projected benefit obligation $ 1,242 $ 197 $ 1,118 $ 89 Accumulated benefit obligation 1,224 178 1,101 79 Fair value of plan assets 1,154 114 1,026 33 Information for pension plans with a projected benefit obligation in excess of plan assets: Projected benefit obligation $ 1,242 $ 224 $ 1,118 $ 220 Fair value of plan assets 1,154 129 1,026 150 The following table summarizes the significant weighted average assumptions used in the calculation of benefit obligation and net periodic benefit cost, both domestic and foreign, as of the periods indicated: December 31, 2019 2018 U.S. Foreign U.S. Foreign Benefit Obligation: Discount rate 3.32 % 7.58 % 4.35 % 5.63 % Rate of compensation increase 3.33 % 6.11 % 3.34 % 4.79 % Periodic Benefit Cost: Discount rate 4.35 % 5.62 % (1) 3.67 % 5.23 % (1) Expected long-term rate of return on plan assets 5.08 % 4.10 % 5.73 % 3.94 % Rate of compensation increase 3.34 % 4.78 % 3.34 % 4.65 % _____________________________ (1) Includes an inflation factor that is used to calculate future periodic benefit cost, but is not used to calculate the benefit obligation. The Company establishes its estimated long-term return on plan assets considering various factors, which include the targeted asset allocation percentages, historic returns, and expected future returns. The measurement of pension obligations, costs, and liabilities is dependent on a variety of assumptions. These assumptions include estimates of the present value of projected future pension payments to all plan participants, taking into consideration the likelihood of potential future events such as salary increases and demographic experience. These assumptions may have an effect on the amount and timing of future contributions. The assumptions used in developing the required estimates include the following key factors: discount rates, salary growth, retirement rates, inflation, expected return on plan assets, and mortality rates. The effects of actual results differing from the Company's assumptions are accumulated and amortized over future periods and, therefore, generally affect the Company's recognized expense in such future periods. Unrecognized gains or losses are amortized using the “corridor approach,” under which the net gain or loss in excess of 10% of the greater of the projected benefit obligation or the market-related value of the assets, if applicable, is amortized. Sensitivity of the Company's pension funded status to the indicated increase or decrease in the discount rate and long-term rate of return on plan assets assumptions is shown below. Note that these sensitivities may be asymmetric and are specific to the base conditions at year-end 2019 . They also may not be additive, so the impact of changing multiple factors simultaneously cannot be calculated by combining the individual sensitivities shown. The funded status as of December 31, 2019 is affected by the assumptions as of that date. Pension expense for 2019 is affected by the December 31, 2018 assumptions. The impact on pension expense from a one percentage point change in these assumptions is shown in the following table (in millions): Increase of 1% in the discount rate $ (14 ) Decrease of 1% in the discount rate 10 Increase of 1% in the long-term rate of return on plan assets (11 ) Decrease of 1% in the long-term rate of return on plan assets 11 The following table summarizes the components of the net periodic benefit cost, both domestic and foreign, for the years indicated (in millions): December 31, 2019 2018 2017 Components of Net Periodic Benefit Cost: U.S. Foreign U.S. Foreign U.S. Foreign Service cost $ 11 $ 8 $ 15 $ 12 $ 13 $ 10 Interest cost 44 19 40 22 41 23 Expected return on plan assets (52 ) (14 ) (64 ) (17 ) (69 ) (21 ) Amortization of prior service cost 5 — 5 — 6 — Amortization of net loss 15 1 18 3 18 2 Curtailment loss recognized — — 1 — 4 — Settlement loss recognized — — — 4 — — Total pension cost $ 23 $ 14 $ 15 $ 24 $ 13 $ 14 The following table summarizes the amounts reflected in AOCL, including AOCL attributable to noncontrolling interests, on the Consolidated Balance Sheet as of December 31, 2019 , that have not yet been recognized as components of net periodic benefit cost (in millions): December 31, 2019 Accumulated Other Comprehensive Income (Loss) U.S. Foreign Prior service cost $ (4 ) $ 1 Unrecognized net actuarial loss (23 ) (63 ) Total $ (27 ) $ (62 ) The following table summarizes the Company's target allocation for 2019 and pension plan asset allocation, both domestic and foreign, as of the periods indicated: Percentage of Plan Assets as of December 31, Target Allocations 2019 2018 Asset Category U.S. Foreign U.S. Foreign U.S. Foreign Equity securities 33% 13% 32.22 % 15.37 % 16.85 % 3.75 % Debt securities 65% 81% 67.17 % 81.67 % 80.20 % 93.57 % Real estate 2% 2% 0.22 % 1.16 % 2.35 % 0.44 % Other —% 4% 0.39 % 1.80 % 0.60 % 2.24 % Total pension assets 100.00 % 100.00 % 100.00 % 100.00 % The U.S. DB Plans seek to achieve the following long-term investment objectives: • maintenance of sufficient income and liquidity to pay retirement benefits and other lump sum payments; • long-term rate of return in excess of the annualized inflation rate; • long-term rate of return, net of relevant fees, that meets or exceeds the assumed actuarial rate; and • long-term competitive rate of return on investments, net of expenses, that equals or exceeds various benchmark rates. The asset allocation is reviewed periodically to determine a suitable asset allocation which seeks to manage risk through portfolio diversification and takes into account the above-stated objectives, in conjunction with current funding levels, cash flow conditions, and economic and industry trends. The following table summarizes the Company's U.S. DB Plan assets by category of investment and level within the fair value hierarchy as of the periods indicated (in millions): December 31, 2019 December 31, 2018 U.S. Plans Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Equity securities (2) : Mutual funds $ — $ 372 $ — $ 372 $ 173 $ — $ — $ 173 Debt securities (2) : Government debt securities — — — — 170 — — 170 Mutual funds (1) — 775 — 775 653 — — 653 Real estate (2) : Real estate — 3 — 3 — 24 — 24 Other: Cash and cash equivalents 4 — — 4 6 — — 6 Total plan assets $ 4 $ 1,150 $ — $ 1,154 $ 1,002 $ 24 $ — $ 1,026 _____________________________ (1) Mutual funds categorized as debt securities consist of mutual funds for which debt securities are the primary underlying investment. (2) In 2019, the U.S. plans moved all investments except cash and cash equivalents into collective trusts; therefore, the 2019 balances under the equity securities, debt securities, and real estate categories shown above represent investments through collective trusts. The plans have chosen collective trusts for which the underlying investments are mutual funds, mutual funds for which debt securities are the primary underlying investment, or real estate in alignment with the target asset allocation. The investment strategy of the foreign DB Plans seeks to maximize return on investment while minimizing risk. The assumed asset allocation has less exposure to equities in order to closely match market conditions and near term forecasts. The following table summarizes the Company's foreign DB plan assets by category of investment and level within the fair value hierarchy as of the periods indicated (in millions): December 31, 2019 December 31, 2018 Foreign Plans Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Equity securities: Mutual funds $ 19 $ — $ — $ 19 $ 14 $ — $ — $ 14 Private equity — — 1 1 — — 1 1 Debt securities: Government debt securities — — — — 13 — — 13 Mutual funds (1) 17 88 — 105 287 84 — 371 Real estate: Real estate — — 2 2 — — 2 2 Other: Cash and cash equivalents — — — — 2 — — 2 Other assets 1 — 1 2 1 — 6 7 Total plan assets $ 37 $ 88 $ 4 $ 129 $ 317 $ 84 $ 9 $ 410 _____________________________ (1) Mutual funds categorized as debt securities consist of mutual funds for which debt securities are the primary underlying investment. The following table summarizes the estimated cash flows for U.S. and foreign expected employer contributions and expected future benefit payments, both domestic and foreign (in millions): U.S. Foreign Expected employer contribution in 2020 $ 8 $ 8 Expected benefit payments for fiscal year ending: 2020 71 15 2021 72 13 2022 73 14 2023 73 15 2024 73 17 2025 - 2029 365 105

Equity

Equity	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Equity	EQUITY Equity Transactions with Noncontrolling Interests Distributed Energy — In 2019 and 2018 , Distributed Energy, through multiple transactions, sold noncontrolling interests in multiple project companies to tax equity partners. These transactions resulted in a $133 million and $98 million increase to noncontrolling interest in 2019 and 2018 , respectively. Distributed Energy is reported in the US and Utilities SBU reportable segment. Alto Maipo — In March 2017, AES Gener completed the legal and financial restructuring of Alto Maipo. As part of this restructuring, AES indirectly acquired the 40% ownership interest of the noncontrolling shareholder for a de minimis payment, and sold a 6.7% interest in the project to the construction contractor. This transaction resulted in a $196 million increase to the Parent Company’s Stockholders’ Equity due to an increase in additional paid-in-capital of $229 million , offset by the reclassification of accumulated other comprehensive losses from NCI to the Parent Company Stockholders’ Equity of $33 million . No gain or loss was recognized in net income as the sale was not considered to be a sale of in-substance real estate. After completion of the sale, the Company has an effective 62% economic interest in Alto Maipo. As the Company maintained control of the partnership after the sale, Alto Maipo continues to be consolidated by the Company within the South America SBU reportable segment. Dominican Republic — In September 2017, Linda Group acquired 5% of our Dominican Republic business for $60 million , pre-tax. This transaction resulted in a net increase of $25 million to the Company’s additional paid-in-capital and noncontrolling interest, respectively. No gain or loss was recognized in net income as the sale was not considered a sale of in-substance real estate. As the Company maintained control after the sale, our businesses in the Dominican Republic continue to be consolidated by the Company within the MCAC SBU reportable segment. The following table summarizes the net income attributable to The AES Corporation and all transfers (to) from noncontrolling interests for the periods indicated (in millions): December 31, 2019 2018 2017 Net income (loss) attributable to The AES Corporation $ 303 $ 1,203 $ (1,161 ) Transfers from noncontrolling interest: Increase (decrease) in The AES Corporation's paid-in capital for sale of subsidiary shares (5 ) (3 ) 13 Increase (decrease) in The AES Corporation's paid-in-capital for purchase of subsidiary shares — — 240 Net transfers (to) from noncontrolling interest (5 ) (3 ) 253 Change from net income (loss) attributable to The AES Corporation and transfers (to) from noncontrolling interests $ 298 $ 1,200 $ (908 ) Accumulated Other Comprehensive Loss — The changes in AOCL by component, net of tax and noncontrolling interests, for the periods indicated were as follows (in millions): Foreign currency translation adjustment, net Derivative gains (losses), net Unfunded pension obligations, net Total Balance at December 31, 2017 $ (1,486 ) $ (333 ) $ (57 ) $ (1,876 ) Other comprehensive loss before reclassifications (214 ) (64 ) — (278 ) Amount reclassified to earnings (21 ) 78 7 64 Other comprehensive income (loss) $ (235 ) $ 14 $ 7 $ (214 ) Cumulative effect of a change in accounting principle — 19 — 19 Balance at December 31, 2018 $ (1,721 ) $ (300 ) $ (50 ) $ (2,071 ) Other comprehensive loss before reclassifications $ (23 ) $ (202 ) $ (15 ) $ (240 ) Amount reclassified to earnings 23 36 27 86 Other comprehensive income (loss) $ — $ (166 ) $ 12 $ (154 ) Cumulative effect of a change in accounting principle — (4 ) — (4 ) Balance at December 31, 2019 $ (1,721 ) $ (470 ) $ (38 ) $ (2,229 ) Reclassifications out of AOCL are presented in the following table. Amounts for the periods indicated are in millions and those in parenthesis indicate debits to the Consolidated Statements of Operations: Details About December 31, AOCL Components Affected Line Item in the Consolidated Statements of Operations 2019 2018 2017 Foreign currency translation adjustments, net Gain (loss) on disposal and sale of business interests $ (23 ) $ 19 $ (188 ) Net gain from disposal of discontinued operations — 2 (455 ) Net income (loss) attributable to The AES Corporation $ (23 ) $ 21 $ (643 ) Derivative gains (losses), net Non-regulated revenue $ (1 ) $ (6 ) $ 25 Non-regulated cost of sales (12 ) (3 ) (12 ) Interest expense (26 ) (49 ) (79 ) Gain (loss) on disposal and sale of business interests 1 — — Foreign currency transaction gains (losses) (12 ) (59 ) 15 Income from continuing operations before taxes and equity in earnings of affiliates (50 ) (117 ) (51 ) Income tax expense 13 24 1 Net equity in earnings (losses) of affiliates (5 ) — — Income (loss) from continuing operations (42 ) (93 ) (50 ) Less: Income from continuing operations attributable to noncontrolling interests and redeemable stock of subsidiaries 6 15 13 Net income (loss) attributable to The AES Corporation $ (36 ) $ (78 ) $ (37 ) Amortization of defined benefit pension actuarial losses, net Non-regulated cost of sales — — 1 General and administrative expenses — — (1 ) Other expense (2 ) (6 ) — Gain (loss) on disposal and sale of business interests (26 ) — — Income from continuing operations before taxes and equity in earnings of affiliates (28 ) (6 ) — Income tax expense — 2 — Income (loss) from continuing operations (28 ) (4 ) — Net gain (loss) from disposal of discontinued operations — (2 ) (266 ) Net income (loss) (28 ) (6 ) (266 ) Less: Income from continuing operations attributable to noncontrolling interests and redeemable stock of subsidiaries 1 (1 ) — Add: Loss from discontinued operations attributable to noncontrolling interests — — 18 Net income (loss) attributable to The AES Corporation $ (27 ) $ (7 ) $ (248 ) Total reclassifications for the period, net of income tax and noncontrolling interests $ (86 ) $ (64 ) $ (928 ) Common Stock Dividends — The Parent Company paid dividends of $0.1365 per outstanding share to its common stockholders during the first, second, third and fourth quarters of 2019 for dividends declared in December 2018 , February, July and October 2019 , respectively. On December 6, 2019, the Board of Directors declared a quarterly common stock dividend of $0.1433 per share payable on February 14, 2020 to shareholders of record at the close of business on January 31, 2020. Stock Repurchase Program — No shares were repurchased in 2019 . The cumulative repurchases from the commencement of the Program in July 2010 through December 31, 2019 totaled 154.3 million shares for a total cost of $1.9 billion , at an average price per share of $12.12 (including a nominal amount of commissions). As of December 31, 2019 , $264 million remained available for repurchase under the Program. The common stock repurchased has been classified as treasury stock and accounted for using the cost method. A total of 153,891,260 and 154,905,595 shares were held as treasury stock at December 31, 2019 and 2018 , respectively. Restricted stock units under the Company's employee benefit plans are issued from treasury stock. The Company has not retired any common stock repurchased since it began the Program in July 2010.

Segment and Geographic Informat

Segment and Geographic Information	12 Months Ended
	Dec. 31, 2019
Segment Reporting [Abstract]
SEGMENT AND GEOGRAPHIC INFORMATION	SEGMENTS AND GEOGRAPHIC INFORMATION The segment reporting structure uses the Company's management reporting structure as its foundation to reflect how the Company manages the businesses internally and is mainly organized by geographic regions which provides a socio-political-economic understanding of our business. The management reporting structure is organized by four SBUs led by our President and Chief Executive Officer: US and Utilities, South America, MCAC, and Eurasia SBUs. Using the accounting guidance on segment reporting, the Company determined that its four operating segments are aligned with its four reportable segments corresponding to its SBUs. Corporate and Other — Included in "Corporate and Other" are the results of the AES self-insurance company and certain equity affiliates, corporate overhead costs which are not directly associated with the operations of our four reportable segments, and certain intercompany charges such as self-insurance premiums which are fully eliminated in consolidation. The Company uses Adjusted PTC as its primary segment performance measure. Adjusted PTC, a non-GAAP measure, is defined by the Company as pre-tax income from continuing operations attributable to The AES Corporation excluding gains or losses of the consolidated entity due to (a) unrealized gains or losses related to derivative transactions and equity securities; (b) unrealized foreign currency gains or losses; (c) gains, losses, benefits and costs associated with dispositions and acquisitions of business interests, including early plant closures, and gains and losses recognized at commencement of sales-type leases; (d) losses due to impairments; (e) gains, losses and costs due to the early retirement of debt; and (f) costs directly associated with a major restructuring program, including, but not limited to, workforce reduction efforts, relocations and office consolidation . Adjusted PTC also includes net equity in earnings of affiliates on an after-tax basis adjusted for the same gains or losses excluded from consolidated entities. The Company has concluded Adjusted PTC better reflects the underlying business performance of the Company and is the most relevant measure considered in the Company's internal evaluation of the financial performance of its segments. Additionally, given its large number of businesses and complexity, the Company concluded that Adjusted PTC is a more transparent measure that better assists investors in determining which businesses have the greatest impact on the Company's results. Revenue and Adjusted PTC are presented before inter-segment eliminations, which includes the effect of intercompany transactions with other segments except for interest, charges for certain management fees, and the write-off of intercompany balances, as applicable. All intra-segment activity has been eliminated within the segment. Inter-segment activity has been eliminated within the total consolidated results. The following tables present financial information by segment for the periods indicated (in millions): Total Revenue Year Ended December 31, 2019 2018 2017 US and Utilities SBU $ 4,058 $ 4,230 $ 4,162 South America SBU 3,208 3,533 3,252 MCAC SBU 1,882 1,728 1,519 Eurasia SBU 1,047 1,255 1,590 Corporate and Other 46 41 35 Eliminations (52 ) (51 ) (28 ) Total Revenue $ 10,189 $ 10,736 $ 10,530 Reconciliation from Income from Continuing Operations before Taxes and Equity in Earnings of Affiliates: Total Adjusted PTC Year Ended December 31, 2019 2018 2017 Income from continuing operations before taxes and equity in earnings of affiliates $ 1,001 $ 2,018 $ 771 Add: Net equity in earnings (losses) of affiliates (172 ) 39 71 Less: Income from continuing operations before taxes, attributable to noncontrolling interests (277 ) (509 ) (521 ) Pre-tax contribution 552 1,548 321 Unrealized derivative and equity securities losses (gains) 113 33 (3 ) Unrealized foreign currency losses (gains) 36 51 (59 ) Disposition/acquisition losses (gains) 12 (934 ) 123 Impairment expense 406 307 542 Loss on extinguishment of debt 121 180 62 Restructuring costs — — 31 Total Adjusted PTC $ 1,240 $ 1,185 $ 1,017 Total Adjusted PTC Year Ended December 31, 2019 2018 2017 US and Utilities SBU $ 569 $ 511 $ 424 South America SBU 504 519 446 MCAC SBU 367 300 277 Eurasia SBU 159 222 290 Corporate and Other (347 ) (346 ) (411 ) Eliminations (12 ) (21 ) (9 ) Total Adjusted PTC $ 1,240 $ 1,185 $ 1,017 Total Assets Depreciation and Amortization Capital Expenditures Year Ended December 31, 2019 2018 2017 2019 2018 2017 2019 2018 2017 US and Utilities SBU $ 13,334 $ 12,286 $ 11,548 $ 465 $ 449 $ 487 $ 1,484 $ 1,373 $ 905 South America SBU 11,314 10,941 11,126 315 300 301 692 662 477 MCAC SBU 4,770 4,462 4,087 183 141 122 344 302 435 Eurasia SBU 3,990 4,538 6,002 67 99 127 30 51 — 211 Discontinued operations — — 86 — — 123 — — 315 Corporate and Other 240 294 263 15 14 9 1 8 13 Total $ 33,648 $ 32,521 $ 33,112 $ 1,045 $ 1,003 $ 1,169 $ 2,551 $ 2,396 $ 2,356 Interest Income Interest Expense Year Ended December 31, 2019 2018 2017 2019 2018 2017 US and Utilities SBU $ 18 $ 10 $ 5 $ 301 $ 287 $ 315 South America SBU 95 92 95 285 283 297 MCAC SBU 22 20 13 142 124 111 Eurasia SBU 180 186 130 127 145 167 Corporate and Other 3 2 1 195 217 280 Total $ 318 $ 310 $ 244 $ 1,050 $ 1,056 $ 1,170 Investments in and Advances to Affiliates Net Equity in Earnings (Losses) of Affiliates Year Ended December 31, 2019 2018 2017 2019 2018 2017 US and Utilities SBU $ 465 $ 538 $ 535 $ 11 $ 35 $ 41 South America SBU 77 213 358 (129 ) 15 28 MCAC SBU 107 5 (5 ) (13 ) (7 ) (4 ) Eurasia SBU 215 293 307 (9 ) 14 9 Corporate and Other 102 65 2 (32 ) (18 ) (3 ) Total $ 966 $ 1,114 $ 1,197 $ (172 ) $ 39 $ 71 The following table presents information, by country, about the Company's consolidated operations for each of the three years ended December 31, 2019 , 2018 , and 2017 , and as of December 31, 2019 and 2018 (in millions). Revenue is recorded in the country in which it is earned and assets are recorded in the country in which they are located. Total Revenue Property, Plant & Equipment, net Year Ended December 31, 2019 2018 2017 2019 2018 United States (1) $ 3,230 $ 3,462 $ 3,487 $ 9,706 $ 8,731 Non-U.S.: Chile 1,839 2,087 1,944 5,939 5,453 Dominican Republic 877 884 826 1,002 903 El Salvador 824 768 686 343 334 Panama 601 438 338 1,819 1,777 Brazil 525 527 541 1,260 1,287 Colombia 472 428 332 340 302 Bulgaria 459 426 367 1,104 1,183 Mexico 402 399 352 648 666 Argentina 373 487 435 392 234 Vietnam (2) 343 245 278 2 2 United Kingdom (3) 147 390 328 — 90 Jordan (4) 95 95 95 — 418 Philippines (5) — 93 449 — — Kazakhstan — — 67 — — Other Non-U.S. 2 7 5 19 16 Total Non-U.S. 6,959 7,274 7,043 12,868 12,665 Total $ 10,189 $ 10,736 $ 10,530 $ 22,574 $ 21,396 _____________________________ (1) Includes Puerto Rico revenues of $294 million , $257 million and $247 million for the years ended December 31, 2019 , 2018 and 2017 , respectively, and property, plant & equipment of $538 million and $553 million as of December 31, 2019 and 2018 , respectively. (2) The Mong Duong II power project is operated under a build, operate and transfer contract. Future expected payments for the construction performance obligation are recognized in Loan receivable on the Consolidated Balance Sheets. See Note 20 — Revenue for further information. (3) The Kilroot and Ballylumford property, plant and equipment was deconsolidated upon completion of the sale in June 2019. See Note 25 — Held-For-Sale and Dispositions for further information. (4) The property, plant and equipment in Jordan was classified as held-for-sale as of December 31, 2019. See Note 25 — Held-For-Sale and Dispositions for further information. (5) The Masinloc property, plant and equipment was classified as held-for-sale as of December 31, 2017, and deconsolidated upon completion of the sale in March 2018. See Note 25 — Held-For-Sale and Dispositions for further information.

Share-Based Compensation

Share-Based Compensation	12 Months Ended
	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
SHARE-BASED COMPENSATION	SHARE-BASED COMPENSATION RESTRICTED STOCK Restricted Stock Units — The Company issues RSUs under its long-term compensation plan. The RSUs are generally granted based upon a percentage of the participant's base salary. The units have a three -year vesting schedule and vest in one-third increments over the three -year period. In all circumstances, RSUs granted by AES do not entitle the holder the right, or obligate AES, to settle the RSU in cash or other assets of AES. For the years ended December 31, 2019 , 2018 , and 2017 , RSUs issued had a grant date fair value equal to the closing price of the Company's stock on the grant date. The Company does not discount the grant date fair values to reflect any post-vesting restrictions. RSUs granted to employees during the years ended December 31, 2019 , 2018 , and 2017 had grant date fair values per RSU of $17.53 , $10.55 and $11.93 , respectively. The following table summarizes the components of the Company's stock-based compensation related to its employee RSUs recognized in the Company's consolidated financial statements (in millions): December 31, 2019 2018 2017 RSU expense before income tax $ 10 $ 11 $ 17 Tax benefit (1 ) (2 ) (4 ) RSU expense, net of tax $ 9 $ 9 $ 13 Total value of RSUs converted (1) $ 12 $ 10 $ 10 Total fair value of RSUs vested $ 10 $ 16 $ 15 _____________________________ (1) Amount represents fair market value on the date of conversion. Cash was not used to settle RSUs or compensation cost capitalized as part of the cost of an asset for the years ended December 31, 2019 , 2018 , and 2017 . As of December 31, 2019 , total unrecognized compensation cost related to RSUs of $10 million is expected to be recognized over a weighted average period of approximately 1.8 years . There were no modifications to RSU awards during the year ended December 31, 2019 . A summary of the activity of RSUs for the year ended December 31, 2019 follows (RSUs in thousands): RSUs Weighted Average Grant Date Fair Values Weighted Average Remaining Vesting Term Nonvested at December 31, 2018 1,923 $ 10.80 Vested (996 ) 10.37 Forfeited and expired (68 ) 11.97 Granted 625 17.53 Nonvested at December 31, 2019 1,484 $ 13.73 1.4 Vested and expected to vest at December 31, 2019 1,360 $ 13.57 The Company initially recognizes compensation cost on the estimated number of instruments for which the requisite service is expected to be rendered. In 2019 , AES has estimated a weighted average forfeiture rate of 11.95% for RSUs granted in 2019 . This estimate will be revised if subsequent information indicates that the actual number of instruments forfeited is likely to differ from previous estimates. Based on the estimated forfeiture rate, the Company expects to expense $10 million on a straight-line basis over a three -year period. The following table summarizes the RSUs that vested and were converted during the periods indicated (RSUs in thousands): Year Ended December 31, 2019 2018 2017 RSUs vested during the year 996 1,428 1,337 RSUs converted during the year, net of shares withheld for taxes 666 950 865 Shares withheld for taxes 329 478 472 OTHER SHARE BASED COMPENSATION The Company has three other share-based award programs. The Company has recorded expenses of $22 million , $20 million and $8 million for 2019 , 2018 and 2017 , respectively, related to these programs. Stock options — AES grants options to purchase shares of common stock under stock option plans to non-employee directors. Under the terms of the plans, the Company may issue options to purchase shares of the Company's common stock at a price equal to 100% of the market price at the date the option is granted. Stock options issued in 2017 , 2018 and 2019 have a three -year vesting schedule and vest in one-third increments over the three -year period. The stock options have a contractual term of 10 years . In all circumstances, stock options granted by AES do not entitle the holder the right, or obligate AES, to settle the stock option in cash or other assets of AES. Performance Stock Units — In 2017 , 2018 and 2019 , the Company issued PSUs to officers under its long-term compensation plan. PSUs are stock units which include performance conditions. Performance conditions are based on the Company's Proportional Free Cash Flow targets for 2017 , 2018 and 2019 . The performance conditions determine the vesting and final share equivalent per PSU and can result in earning an award payout range of 0% to 200% , depending on the achievement. The Company believes that it is probable that the performance condition will be met and will continue to be evaluated throughout the performance period. In all circumstances, PSUs granted by AES do not entitle the holder the right, or obligate AES, to settle the stock units in cash or other assets of AES. Performance Cash Units — In 2017 , 2018 and 2019 , the Company issued PCUs to its officers under its long-term compensation plan. The value of these units is dependent on the market condition of total stockholder return on AES common stock as compared to the total stockholder return of the Standard and Poor's 500 Utilities Sector Index, Standard and Poor's 500 Index and MSCI Emerging Market Index over a three

Redeemable Stock of Subsidiarie

Redeemable Stock of Subsidiaries	12 Months Ended
	Dec. 31, 2019
Temporary Equity [Abstract]
REDEEMABLE STOCK OF SUBSIDIARES	REDEEMABLE STOCK OF SUBSIDIARIES The following table is a reconciliation of changes in redeemable stock of subsidiaries (in millions): December 31, 2019 2018 Balance at the beginning of the period $ 879 $ 837 Contributions from holders of redeemable stock of subsidiaries 10 34 Net income (loss) attributable to redeemable stock of subsidiaries (7 ) 2 Fair value adjustment 6 4 Other comprehensive income (loss) attributable to redeemable stock of subsidiaries — 2 Balance at the end of the period $ 888 $ 879 The following table summarizes the Company's redeemable stock of subsidiaries balances as of the periods indicated (in millions): December 31, 2019 2018 IPALCO common stock $ 618 $ 618 Colon quotas (1) 210 201 IPL preferred stock 60 60 Total redeemable stock of subsidiaries $ 888 $ 879 _____________________________ (1) Characteristics of quotas are similar to common stock. Colon — Our partner in Colon made capital contributions of $10 million and $34 million during the year ended December 31, 2019 and 2018 , respectively. Any subsequent adjustments to allocate earnings and dividends to our partner, or measure the investment at fair value, will be classified as temporary equity each reporting period as it is probable that the shares will become redeemable. IPL — IPL had $60 million of cumulative preferred stock outstanding at December 31, 2019 and 2018 , which represents five series of preferred stock. The total annual dividend requirements were approximately $3 million at December 31, 2019 and 2018 . Certain series of the preferred stock were redeemable solely at the option of the issuer at prices between $100 and $118 per share. Holders of the preferred stock are entitled to elect a majority of IPL's board of directors if IPL has not paid dividends to its preferred stockholders for four

Revenue (Notes)

Revenue (Notes)	12 Months Ended
	Dec. 31, 2019
Revenue [Abstract]
Revenue from Contract with Customer [Text Block]	The following table presents our revenue from contracts with customers and other revenue for the periods indicated (in millions): Year Ended December 31, 2019 US and Utilities SBU South America SBU MCAC SBU Eurasia SBU Corporate, Other and Eliminations Total Regulated Revenue Revenue from contracts with customers $ 2,979 $ — $ — $ — $ — $ 2,979 Other regulated revenue 49 — — — — 49 Total regulated revenue 3,028 — — — — 3,028 Non-Regulated Revenue Revenue from contracts with customers 767 3,205 1,788 799 (4 ) 6,555 Other non-regulated revenue (1) 263 3 94 248 (2 ) 606 Total non-regulated revenue 1,030 3,208 $ 1,882 1,047 (6 ) 7,161 Total revenue $ 4,058 $ 3,208 $ 1,882 $ 1,047 $ (6 ) $ 10,189 Year Ended December 31, 2018 US and Utilities SBU South America SBU MCAC SBU Eurasia SBU Corporate, Other and Eliminations Total Regulated Revenue Revenue from contracts with customers $ 2,885 $ — $ — $ — $ — $ 2,885 Other regulated revenue 54 — — — — 54 Total regulated revenue 2,939 — $ — — $ — 2,939 Non-Regulated Revenue Revenue from contracts with customers 972 3,529 1,642 $ 943 (11 ) $ 7,075 Other non-regulated revenue (1) 319 4 86 312 1 722 Total non-regulated revenue 1,291 $ 3,533 1,728 $ 1,255 (10 ) $ 7,797 Total revenue $ 4,230 $ 3,533 $ 1,728 $ 1,255 $ (10 ) $ 10,736 _____________________________ (1) Other non-regulated revenue primarily includes lease and derivative revenue not accounted for under ASC 606. Contract Balances — The timing of revenue recognition, billings, and cash collections results in accounts receivable and contract liabilities. The contract liabilities from contracts with customers were $117 million and $109 million as of December 31, 2019 and December 31, 2018 , respectively. During the years ended December 31, 2019 and 2018 , we recognized revenue of $13 million and $36 million , respectively, that was included in the corresponding contract liability balance at the beginning of the periods. A significant financing arrangement exists for our Mong Duong plant in Vietnam. The plant was constructed under a build, operate, and transfer contract and will be transferred to the Vietnamese government after the completion of a 25 year PPA. The performance obligation to construct the facility was substantially completed in 2015. Approximately $1.4 billion of contract consideration related to the construction, but not yet collected through the 25 year PPA, was reflected as a loan receivable as of December 31, 2019 . Remaining Performance Obligations — The transaction price allocated to remaining performance obligations represents future consideration for unsatisfied (or partially unsatisfied) performance obligations at the end of the reporting period. As of December 31, 2019 , the aggregate amount of transaction price allocated to remaining performance obligations was $12 million , primarily consisting of fixed consideration for the sale of renewable energy credits (RECs) in long-term contracts in the U.S. We expect to recognize revenue on approximately one-fifth of the remaining performance obligations in 2020 and 2021, with the remainder recognized thereafter.

Other Income and Expense

Other Income and Expense	12 Months Ended
	Dec. 31, 2019
Other Income and Expenses [Abstract]
OTHER INCOME AND EXPENSE	OTHER INCOME AND EXPENSE Other income generally includes gains on insurance recoveries in excess of property damage, gains on asset sales and liability extinguishments, favorable judgments on contingencies, gains on contract terminations, allowance for funds used during construction and other income from miscellaneous transactions. Other expense generally includes losses on asset sales and dispositions, losses on legal contingencies, defined benefit plan non-service costs, and losses from other miscellaneous transactions. The components are summarized as follows (in millions): Year Ended December 31, 2019 2018 2017 Other Income Gain on insurance proceeds (1) $ 118 $ — $ — Gain on remeasurement of contingent consideration (2) — 32 — AFUDC (US Utilities) 3 8 26 Legal settlements (3) — — 60 Other 24 32 34 Total other income $ 145 $ 72 $ 120 Other Expenses Loss on commencement of sales-type leases (4) 36 — — Loss on sale and disposal of assets (5) 22 30 28 Non-service pension and other postretirement costs 17 10 1 Allowance for other receivables — 7 — Water rights write-off — — 19 Other 5 11 10 Total other expense $ 80 $ 58 $ 58 _____________________________ (1) Associated with recoveries for property damage at the Andres facility in the Dominican Republic from a lightning incident in September 2018 and the upgrade of the tunnel lining at Changuinola. (2) Related to the amendment of the Oahu purchase agreement. See Note 26 — Acquisitions for further information. (3) In December 2016, the Company and YPF entered into a settlement in which all parties agreed to give up any and all legal action related to gas supply contracts that were terminated in 2008 and have been in dispute since 2009. In January 2017, the YPF board approved the agreement and paid the Company $60 million , thereby resolving all uncertainties around the dispute. (4) Related to losses recognized at commencement of sales-type leases at Distributed Energy. See Note 14 — Leases for further information. (5) Associated with a loss due to damage from a lightning incident at the Andres facility in the Dominican Republic in September 2018 and a loss associated with upgrading the tunnel lining at Changuinola in 2019.

Asset Impairment Expense

Asset Impairment Expense	12 Months Ended
	Dec. 31, 2019
Impairment or Disposal of Tangible Assets Disclosure [Abstract]
ASSET IMPAIRMENT EXPENSE	ASSET IMPAIRMENT EXPENSE Year ended December 31, (in millions) 2019 2018 2017 Kilroot and Ballylumford $ 115 $ — $ 37 Hawaii 60 — — Shady Point — 157 — Nejapa — 37 — DPL — — 175 Laurel Mountain — — 121 Kazakhstan Hydroelectric — — 92 Kazakhstan CHPs — — 94 Other 10 14 18 Total $ 185 $ 208 $ 537 Hawaii — During the fourth quarter of 2019, the Company tested the recoverability of its long-lived coal-fired asset in Hawaii. Uncertainty around the ability to contract the asset upon expiration of its existing PPA resulted in management's decision to reassess the economic useful life of the generation facility. A decrease in the economic useful life was identified as an impairment indicator. The Company determined that the carrying amount was not recoverable. The asset group, consisting of property, plant and equipment and intangible assets, was determined to have a fair value of $103 million using the income approach. As a result, the Company recognized asset impairment expense of $60 million as of December 31, 2019. Hawaii is reported in the US and Utilities SBU reportable segment. Kilroot and Ballylumford — During the fourth quarter of 2017, the Company tested the recoverability of its long-lived assets at Kilroot, a coal and oil-fired plant in Northern Ireland, as Kilroot was not successful in bidding its coal units into the December 2017 capacity auction for the newly implemented I-SEM market. The Company determined that the carrying amount of the asset group was not recoverable. The Kilroot asset group was determined to have a fair value of $20 million using the income approach. As a result, the Company recognized asset impairment expense of $37 million during the year ended December 31, 2017, which was limited to the carrying value of the coal units. In April 2019, the Company entered into an agreement to sell its entire 100% interest in the Kilroot coal and oil-fired plant and energy storage facility and the Ballylumford gas-fired plant in the United Kingdom. Upon meeting the held-for-sale criteria, the Company performed an impairment analysis and determined that the carrying value of the asset group of $232 million was greater than its fair value less costs to sell of $114 million . As a result, the Company recognized asset impairment expense of $115 million . The Company completed the sale of Kilroot and Ballylumford in June 2019. Prior to their sale, Kilroot and Ballylumford were reported in the Eurasia SBU reportable segment. See Note 25 —Held-for-Sale and Dispositions for further information. Shady Point — In December 2018, the Company entered into an agreement to sell Shady Point, a coal-fired generation facility in the U.S. Due first to the uncertainty around future cash flows, and then upon meeting the held-for-sale criteria, the Company performed an impairment analysis of the Shady Point asset group in the second, third and fourth quarters of 2018, resulting in the recognition of total asset impairment expense of $157 million for the year ended December 31, 2018. Using the market approach, the asset group was determined to have a fair value of $30 million as of December 31, 2018. The sale was completed in May 2019. Prior to the sale, Shady Point was reported in the US and Utilities SBU reportable segment. See Note 25 — Held-for-Sale and Dispositions for further information. Nejapa — During the fourth quarter of 2018, the Company tested the recoverability of its long-lived assets at Nejapa, a landfill gas plant in El Salvador. Decreased production as a result of the landfill owner's failure to perform improvements necessary to continue extracting gas from the landfill was identified as an impairment indicator. The Company determined that the carrying amount was not recoverable. The asset group, consisting of property, plant, and equipment and intangible assets, was determined to have a fair value of $5 million using the income approach. As a result, the Company recognized asset impairment expense of $37 million as of December 31, 2018. Nejapa is reported in the US and Utilities SBU reportable segment. DPL — In March 2017, the Board of Directors of DPL approved the retirement of the DPL operated and co-owned Stuart coal-fired and diesel-fired generating units, and the Killen coal-fired generating unit and combustion turbine on or before June 1, 2018. The Company performed an impairment analysis and determined that the carrying amounts of the facilities were not recoverable. The Stuart and Killen asset groups were determined to have fair values of $3 million and $8 million , respectively, using the income approach. As a result, the Company recognized total asset impairment expense of $66 million . The Stuart and Killen units were retired in May 2018. Prior to their retirement, Stuart and Killen were reported in the US and Utilities SBU reportable segment. In December 2017, DPL entered into an agreement for the sale of six of its combustion turbine and diesel-fired generation facilities and related assets ("DPL peaker assets"). Upon meeting the held-for-sale criteria, the Company performed an impairment analysis and determined that the carrying value of the asset group of $346 million was greater than its fair value less costs to sell of $237 million . As a result, the Company recognized asset impairment expense of $109 million . DPL completed the sale of the peaker assets in March 2018. Prior to their sale, the DPL peaker assets were reported in the US and Utilities SBU reportable segment. See Note 25 — Held-for-Sale and Dispositions for further information. Laurel Mountain — During the fourth quarter of 2017, the Company tested the recoverability of its long-lived assets at Laurel Mountain, a wind farm in the U.S. Impairment indicators were identified based on a decline in forward pricing. The Company determined that the carrying amount was not recoverable. The Laurel Mountain asset group was determined to have a fair value of $33 million using the income approach. As a result, the Company recognized asset impairment expense of $121 million . Laurel Mountain is reported in the US and Utilities SBU reportable segment. Kazakhstan Hydroelectric — In April 2017, the Republic of Kazakhstan stated the concession agreements would not be extended for Shulbinsk HPP and Ust-Kamenogorsk HPP, two hydroelectric plants in Kazakhstan, and initiated the process to transfer these plants back to the government. Upon meeting the held-for-sale criteria in the second quarter of 2017, the Company performed an impairment analysis and determined the carrying value of the asset group of $190 million , which included cumulative translation losses of $100 million , was greater than its fair value less costs to sell of $92 million . As a result, the Company recognized asset impairment expense of $92 million limited to the carrying value of the long-lived assets. The Company completed the transfer of the plants in October 2017. Prior to their transfer, the Kazakhstan hydroelectric plants were reported in the Eurasia SBU reportable segment. See Note 25 — Held-for-Sale and Dispositions for further information. Kazakhstan CHPs — In January 2017, the Company entered into an agreement for the sale of Ust-Kamenogorsk CHP and Sogrinsk CHP, its combined heating and power coal plants in Kazakhstan. Upon meeting the held-for-sale criteria in the first quarter of 2017, the Company performed an impairment analysis and determined that the carrying value of the asset group of $171 million , which included cumulative translation losses of $92 million , was greater than its fair value less costs to sell of $29 million . As a result, the Company recognized asset impairment expense of $94 million limited to the carrying value of the long-lived assets. The Company completed the sale of its interest in the Kazakhstan CHP plants in April 2017. Prior to their sale, the plants were reported in the Eurasia SBU reportable segment. See Note 25 — Held-for-Sale and Dispositions for further information.

Income Taxes

Income Taxes	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
INCOME TAXES	INCOME TAXES U.S. Tax Reform — In 2017, the U.S. enacted the Tax Cuts and Jobs Act (the “TCJA”). The TCJA significantly changed U.S. corporate income tax law. Among other changes effective in 2017, the TCJA required companies to pay a one-time tax on certain unrepatriated earnings of foreign subsidiaries. Many other changes took effect in 2018, including a limit on the deductibility of interest expense and a new regime for taxing certain earnings of foreign subsidiaries. The Company recognized the income tax effects of the TCJA in accordance with Staff Accounting Bulletin No. 118 (“SAB 118”) which provides SEC guidance on the application of ASC 740, Income Taxes , in the reporting period in which the TCJA was signed into law. Accordingly, the Company’s 2017 financial statements reflected provisional amounts for those impacts for which the accounting under ASC 740 was incomplete, but a reasonable estimate could be determined. As of December 31, 2018, the Company's accounting for the initial impacts of the TCJA was complete under SAB 118. For the year ended December 31, 2018 the Company increased its estimate of the one-time transition tax by $194 million to $869 million . The estimated tax expense recognized for the year ended December 31, 2017 relating to the remeasurement of deferred tax assets and liabilities from an income tax rate of 35% to 21% , decreased $77 million , resulting in a total remeasurement benefit of $38 million . In 2019, the U.S. Treasury issued final regulations related to the one-time transition tax which further amended the guidance of previously proposed regulations. As a result, $17 million of tax benefit was recorded in 2019, decreasing the total one-time transition tax to $852 million . This impact was partially offset by $7 million of deferred tax remeasurement expense, decreasing the total remeasurement benefit to $31 million . Argentine Tax Reform — In December 2017, the Argentine government enacted reforms to its income tax laws that resulted in a decrease to statutory income tax rates for our Argentine businesses from 35% to 30% in 2018-2019 and to 25% for 2020 and future years. The impact of remeasuring deferred taxes to account for the enacted change in future applicable income tax rates was recognized as income tax benefit in the fourth quarter of 2017, resulting in a decrease of $21 million to consolidated income tax expense. In December 2019, the Argentine government delayed certain impacts of the 2017 reform. The corporate income tax rate for 2020 and 2021 will remain at 30% , reducing to 25% only from 2022. The impact of remeasuring deferred taxes for this latest change to enacted income tax rates was recognized as income tax expense of $4 million in the fourth quarter of 2019. Income Tax Provision — The following table summarizes the expense for income taxes on continuing operations for the periods indicated (in millions): December 31, 2019 2018 2017 Federal: Current $ (7 ) $ 7 $ — Deferred (4 ) 186 545 State: Current (1 ) 2 — Deferred — 5 1 Foreign: Current 368 378 335 Deferred (4 ) 130 109 Total $ 352 $ 708 $ 990 Effective and Statutory Rate Reconciliation — The following table summarizes a reconciliation of the U.S. statutory federal income tax rate to the Company's effective tax rate as a percentage of income from continuing operations before taxes for the periods indicated: December 31, 2019 2018 2017 Statutory Federal tax rate 21 % 21 % 35 % State taxes, net of Federal tax benefit 6 % 2 % (7 )% Taxes on foreign earnings 12 % 9 % — % Valuation allowance (2 )% (2 )% 10 % Change in tax law (1 )% 6 % 90 % Other—net (1 )% (1 )% — % Effective tax rate 35 % 35 % 128 % For 2019, the 12% taxes on foreign earnings item includes $19 million of tax benefit associated with the Company's equity investment in Guacolda. Included in the 2019 change in tax law amount of (1)% are the downward adjustments to the U.S. one-time transition tax expense and deferred tax remeasurement benefit resulting from the issuance of the final regulations in 2019, offset by the impact of deferred tax remeasurement expense related to the December 2019 Argentina tax law change. For 2018, the 6% change in tax law item relates primarily to changes in estimate under SAB 118 of the impacts of adoption of the TCJA. The Company recognized tax expense of $194 million related to revised estimates of the one-time transition tax in accordance with proposed regulations issued by the U.S. Treasury in 2018. The adjustment was due in large part to the approach the proposed regulations adopted to determine the fair value of our interests in publicly traded subsidiaries. The Company also recognized tax benefit of $77 million related to revised estimates of deferred tax remeasurement. Included in the 9% taxes on foreign earnings item is $124 million of U.S. GILTI tax expense related to foreign subsidiaries, including the sale of our interest in Masinloc. For 2017, the 90% change in tax law item relates primarily to the impact of U.S. and Argentine tax reform. The impact of the U.S one-time transition tax and remeasurement of deferred taxes represents 88% and 5% , respectively, which is partially offset by the tax benefit resulting from Argentine tax reform representing 3% . Income Tax Receivables and Payables — The current income taxes receivable and payable are included in Other Current Assets and Accrued and Other Liabilities , respectively, on the accompanying Consolidated Balance Sheets. The noncurrent income taxes receivable and payable are included in Other Noncurrent Assets and Other Noncurrent Liabilities , respectively, on the accompanying Consolidated Balance Sheets. The following table summarizes the income taxes receivable and payable as of the periods indicated (in millions): December 31, 2019 2018 Income taxes receivable—current $ 131 $ 163 Income taxes receivable—noncurrent 10 8 Total income taxes receivable $ 141 $ 171 Income taxes payable—current $ 172 $ 210 Income taxes payable—noncurrent — 7 Total income taxes payable $ 172 $ 217 Deferred Income Taxes — Deferred income taxes reflect the net tax effects of (a) temporary differences between the carrying amounts of assets and liabilities for financial reporting purposes and the amounts used for income tax purposes and (b) operating loss and tax credit carryforwards. These items are stated at the enacted tax rates that are expected to be in effect when taxes are actually paid or recovered. As of December 31, 2019 , the Company had federal net operating loss carryforwards for tax return purposes of approximately $0.8 billion expiring in years 2033 to 2036. The Company also had federal general business tax credit carryforwards of approximately $23 million expiring primarily from 2021 to 2039, and federal alternative minimum tax credits of approximately $8 million that may be fully recovered by 2021 under the TCJA. Additionally, the Company had state net operating loss carryforwards as of December 31, 2019 of approximately $6.9 billion expiring primarily in years 2020 to 2039. As of December 31, 2019 , the Company had foreign net operating loss carryforwards of approximately $2.7 billion that expire at various times beginning in 2020 and some of which carry forward without expiration, and tax credits available in foreign jurisdictions of approximately $14 million , $12 million of which expire in 2021. Valuation allowances decreased $44 million during 2019 to $824 million at December 31, 2019 . This net decrease was primarily the result of valuation allowance activity at certain U.S. states. Valuation allowances decreased $120 million during 2018 to $868 million at December 31, 2018 . This net decrease was primarily the result of valuation allowance activity at certain of our Brazil subsidiaries and U.S. states. The Company believes that it is more likely than not that the net deferred tax assets as shown below will be realized when future taxable income is generated through the reversal of existing taxable temporary differences and income that is expected to be generated by businesses that have long-term contracts or a history of generating taxable income. The following table summarizes deferred tax assets and liabilities, as of the periods indicated (in millions): December 31, 2019 2018 Differences between book and tax basis of property $ (1,426 ) $ (1,418 ) Other taxable temporary differences (287 ) (243 ) Total deferred tax liability (1,713 ) (1,661 ) Operating loss carryforwards 1,060 1,066 Capital loss carryforwards 57 52 Bad debt and other book provisions 74 62 Tax credit carryforwards 33 55 Other deductible temporary differences 256 111 Total gross deferred tax asset 1,480 1,346 Less: valuation allowance (824 ) (868 ) Total net deferred tax asset 656 478 Net deferred tax liability $ (1,057 ) $ (1,183 ) The Company considers undistributed earnings of certain foreign subsidiaries to be indefinitely reinvested outside of the U.S. Except for the one-time transition tax in the U.S., no taxes have been recorded with respect to our indefinitely reinvested earnings in accordance with the relevant accounting guidance for income taxes. Should the earnings be remitted as dividends, the Company may be subject to additional foreign withholding and state income taxes. Under the TCJA, future distributions from foreign subsidiaries will generally be subject to a federal dividends received deduction in the U.S. As of December 31, 2019, the cumulative amount of U.S. GAAP foreign un-remitted earnings upon which additional income taxes have not been provided is approximately $4 billion . It is not practicable to estimate the amount of any additional taxes which may be payable on the undistributed earnings. Income from operations in certain countries is subject to reduced tax rates as a result of satisfying specific commitments regarding employment and capital investment. The Company's income tax benefits related to the tax status of these operations are estimated to be $26 million , $35 million and $26 million for the years ended December 31, 2019 , 2018 and 2017 , respectively. The per share effect of these benefits after noncontrolling interests was $0.02 , $0.04 and $0.03 for the years ended December 31, 2019 , 2018 and 2017 , respectively. Included in the Company's income tax benefits is the benefit related to our operations in Vietnam, which is estimated to be $13 million , $19 million and $13 million for the years ended December 31, 2019 , 2018 and 2017 , respectively. The per share effect of these benefits related to our operations in Vietnam after noncontrolling interest was $0.01 , $0.01 and $0.01 for the years ended December 31, 2019, 2018 and 2017, respectively. The following table shows the income (loss) from continuing operations, before income taxes, net equity in earnings of affiliates and noncontrolling interests, for the periods indicated (in millions): December 31, 2019 2018 2017 U.S. $ (57 ) $ (218 ) $ (511 ) Non-U.S. 1,058 2,236 1,282 Total $ 1,001 $ 2,018 $ 771 Uncertain Tax Positions — Uncertain tax positions have been classified as noncurrent income tax liabilities unless they are expected to be paid within one year. The Company's policy for interest and penalties related to income tax exposures is to recognize interest and penalties as a component of the provision for income taxes in the Consolidated Statements of Operations. The following table shows the total amount of gross accrued income taxes related to interest and penalties included in the Consolidated Balance Sheets for the periods indicated (in millions): December 31, 2019 2018 Interest related $ 2 $ 4 Penalties related — — The following table shows the expense/(benefit) related to interest and penalties on unrecognized tax benefits for the periods indicated (in millions): December 31, 2019 2018 2017 Total expense (benefit) for interest related to unrecognized tax benefits $ (2 ) $ (3 ) $ 1 Total expense for penalties related to unrecognized tax benefits — — — We are potentially subject to income tax audits in numerous jurisdictions in the U.S. and internationally until the applicable statute of limitations expires. Tax audits by their nature are often complex and can require several years to complete. The following is a summary of tax years potentially subject to examination in the significant tax and business jurisdictions in which we operate: Jurisdiction Tax Years Subject to Examination Argentina 2014-2019 Brazil 2014-2019 Chile 2016-2019 Colombia 2016-2019 Dominican Republic 2015-2019 El Salvador 2017-2019 Netherlands 2013-2019 Panama 2016-2019 United Kingdom 2016-2019 United States (Federal) 2016-2019 As of December 31, 2019 , 2018 and 2017 , the total amount of unrecognized tax benefits was $465 million , $463 million and $348 million , respectively. The total amount of unrecognized tax benefits that would benefit the effective tax rate as of December 31, 2019 , 2018 and 2017 is $448 million , $446 million and $332 million , respectively, of which $33 million , $33 million and $29 million , respectively, would be in the form of tax attributes that would warrant a full valuation allowance. Further, the total amount of unrecognized tax benefit that would benefit the effective tax rate as of 2019 would be reduced by approximately $161 million of tax expense related to remeasurement from 35% to 21% . The total amount of unrecognized tax benefits anticipated to result in a net decrease to unrecognized tax benefits within 12 months of December 31, 2019 is estimated to be between $0 million and $10 million , primarily relating to statute of limitation lapses and tax exam settlements. The following is a reconciliation of the beginning and ending amounts of unrecognized tax benefits for the periods indicated (in millions): 2019 2018 2017 Balance at January 1 $ 463 $ 348 $ 352 Additions for current year tax positions 6 2 — Additions for tax positions of prior years 4 146 2 Reductions for tax positions of prior years (5 ) (26 ) (5 ) Lapse of statute of limitations (3 ) (7 ) (1 ) Balance at December 31 $ 465 $ 463 $ 348 The Company and certain of its subsidiaries are currently under examination by the relevant taxing authorities for various tax years. The Company regularly assesses the potential outcome of these examinations in each of the taxing jurisdictions when determining the adequacy of the amount of unrecognized tax benefit recorded. While it is often difficult to predict the final outcome or the timing of resolution of any particular uncertain tax position, we believe we have appropriately accrued for our uncertain tax benefits. However, audit outcomes and the timing of audit settlements and future events that would impact our previously recorded unrecognized tax benefits and the range of anticipated increases or decreases in unrecognized tax benefits are subject to significant uncertainty. It is possible that the ultimate outcome of current or future examinations may exceed our provision for current unrecognized tax benefits in amounts that could be material, but cannot be estimated as of December 31, 2019 . Our effective tax rate and net income in any given future period could therefore be materially impacted.

Discontinued Operations

Discontinued Operations	12 Months Ended
	Dec. 31, 2019
Discontinued Operations and Disposal Groups [Abstract]
DISCONTINUED OPERATIONS AND HELD-FOR-SALE BUSINESSES	DISCONTINUED OPERATIONS Due to a portfolio evaluation in the first half of 2016, management decided to pursue a strategic shift to reduce the Company's exposure to the Brazilian distribution market. Eletropaulo — In November 2017, Eletropaulo converted its preferred shares into ordinary shares and transitioned the listing of those shares to the Novo Mercado, which is a listing segment of the Brazilian stock exchange with the highest standards of corporate governance. Upon conversion of the preferred shares into ordinary shares, AES no longer controlled Eletropaulo, but maintained significant influence over the business. As a result, the Company deconsolidated Eletropaulo. After deconsolidation, the Company's 17% ownership interest was reflected as an equity method investment. The Company recorded an after-tax loss on deconsolidation of $611 million , which primarily consisted of $455 million related to cumulative translation losses and $243 million related to pension losses reclassified from AOCL. In December 2017, all remaining criteria were met for Eletropaulo to qualify as a discontinued operation. Therefore, its results of operations and financial position were reported as such in the consolidated financial statements for all periods presented. In June 2018, the Company completed the sale of its entire 17% ownership interest in Eletropaulo through a bidding process hosted by the Brazilian securities regulator, CVM. Gross proceeds of $340 million were received at our subsidiary in Brazil, subject to the payment of taxes. Upon disposal of Eletropaulo, the Company recorded a pre-tax gain on sale of $243 million (after-tax $199 million ). Excluding the gain on sale, Eletropaulo's pre-tax loss attributable to AES was immaterial for the year ended December 31, 2018. Eletropaulo's pre-tax loss attributable to AES, including the loss on deconsolidation, for the year ended December 31, 2017 was $633 million . Prior to its classification as discontinued operations, Eletropaulo was reported in the South America SBU reportable segment. Borsod — In 2011, Borsod, which held two coal and biomass-fired generation plants in Hungary, filed for liquidation and was deconsolidated with its historical operating results reflected in discontinued operations under prior accounting guidance. In October 2018, the liquidation was completed and the Company recognized a deferred gain of $26 million , primarily comprised of a $20 million write-off of cumulative translation balances. Prior to its liquidation, Borsod was reported in the Eurasia SBU reportable segment. Excluding the gain on sale of Eletropaulo and the deferred gain on liquidation of Borsod, income from discontinued operations and cash flows from operating and investing activities of discontinued operations were immaterial for the year ended December 31, 2018. The following table summarizes the major line items constituting loss from discontinued operations for the period indicated (in millions): December 31, 2017 Income (loss) from discontinued operations, net of tax: Revenue — regulated $ 3,320 Cost of sales (3,151 ) Other income and expense items that are not major (1) (166 ) Income from operations of discontinued businesses 3 Loss from disposal and impairments of discontinued businesses (611 ) Loss from discontinued operations (608 ) Less: Net income attributable to noncontrolling interests (25 ) Loss from discontinued operations attributable to The AES Corporation (633 ) Income tax expense (21 ) Loss from discontinued operations, net of tax $ (654 ) _____________________________ (1) Includes a loss contingency recognized by our equity method investment in discontinued operations. The following table summarizes the operating and investing cash flows from discontinued operations for the period indicated (in millions): December 31, 2017 Cash flows provided by operating activities of discontinued operations $ 164 Cash flows used in investing activities of discontinued operations (288 )

Held-for-Sale and Dispositions

Held-for-Sale and Dispositions	12 Months Ended
	Dec. 31, 2019
Business Combinations [Abstract]
Held-for-Sale and Dispositions	Held-for-Sale Jordan — In February 2019, the Company entered into an agreement to sell its 36% ownership interest in two generation plants, IPP1 and IPP4, and a solar plant in Jordan for $86 million , subject to customary post-closing adjustments, plus capital contributions to the solar project of approximately $5 million . The sale of IPP1 and IPP4 is expected to close in the first half of 2020 and the sale of the solar plant is expected to close in the second half of 2020. As of December 31, 2019 , the generation plants and solar plant were classified as held-for-sale, but did not meet the criteria to be reported as discontinued operations. On a consolidated basis, the carrying value of the plants held-for-sale as of December 31, 2019 was $153 million . Pre-tax income attributable to AES was $19 million , $10 million and $11 million for the years ended December 31, 2019 , 2018 and 2017 , respectively. Jordan is reported in the Eurasia SBU reportable segment. Redondo Beach — In October 2018, the Company entered into an agreement to sell land held by AES Redondo Beach, a gas-fired generating facility in California. The sale is expected to close by the end of the first quarter of 2020. As of December 31, 2019 , the $24 million carrying value of the land held by Redondo Beach was classified as held-for-sale. Redondo Beach is reported in the US and Utilities SBU reportable segment. Dispositions Stuart and Killen — In December 2019, DPL completed the transfer of the co-owned Stuart coal-fired and diesel-fired generating units and the Killen coal-fired generating unit and combustion turbine retired in May 2018, including the associated environmental liabilities. The transfer resulted in cash expenditures of $51 million and a gain on disposal of $20 million . Prior to their transfer, Stuart and Killen were reported in the US and Utilities SBU reportable segment. See Note 22 —Asset Impairment Expense for further information. Kilroot and Ballylumford — In June 2019, the Company completed the sale of its entire interest in the Kilroot coal and oil-fired plant and energy storage facility and the Ballylumford gas-fired plant in the United Kingdom for $118 million , subject to customary post-closing adjustments, resulting in a pre-tax loss on sale of $33 million primarily due to the write-off of cumulative translation adjustments and accumulated other comprehensive income balances. The sale did not meet the criteria to be reported as discontinued operations. Prior to the sale, Kilroot and Ballylumford were reported in the Eurasia SBU reportable segment. See Note 22 —Asset Impairment Expense for further information. Shady Point — In May 2019, the Company completed the sale of Shady Point, a U.S. coal-fired generating facility, for $29 million . The sale did not meet the criteria to be reported as discontinued operations. Prior to its sale, Shady Point was reported in the US and Utilities SBU reportable segment. See Note 22 —Asset Impairment Expense for further information. CTNG — In December 2018, AES Gener completed the sale of CTNG, an entity that holds transmission lines in Chile, for $225 million , resulting in a pre-tax gain on sale of $126 million after post-closing adjustments. The sale did not meet the criteria to be reported as discontinued operations. Prior to its sale, CTNG was reported in the South America SBU reportable segment. Electrica Santiago — In May 2018, AES Gener completed the sale of Electrica Santiago for total consideration of $287 million , resulting in a final pre-tax gain on sale of $70 million after post-closing adjustments. Electrica Santiago consisted of four gas and diesel-fired generation plants in Chile. The sale did not meet the criteria to be reported as discontinued operations. Prior to its sale, Electrica Santiago was reported in the South America SBU reportable segment. Masinloc — In March 2018, the Company completed the sale of its entire 51% equity interest in Masinloc for cash proceeds of $1.05 billion , resulting in a pre-tax gain on sale of $772 million after post-closing adjustments, subject to U.S. income tax. Masinloc consisted of a coal-fired generation plant in operation, a coal-fired generation plant under construction and an energy storage facility all located in the Philippines. The sale did not meet the criteria to be reported as discontinued operations. Prior to its sale, Masinloc was reported in the Eurasia SBU reportable segment. In 2014, the Company completed the sale of 45% of its ownership interest in Masinloc for $436 million , including $23 million of consideration that was contingent upon the achievement of certain tax restructuring efficiencies. In December 2017, the related contingency expired and the $23 million of contingent consideration was recognized as a gain in Gain (loss) on disposal and sale of business interests in the Consolidated Statement of Operations. DPL peaker assets — In March 2018, DPL completed the sale of six of its combustion turbine and diesel-fired generation facilities and related assets ("DPL peaker assets") for total proceeds of $239 million , resulting in a loss on sale of $2 million . The sale did not meet the criteria to be reported as discontinued operations. Prior to their sale, the DPL peaker assets were reported in the US and Utilities SBU reportable segment. Beckjord facility — In February 2018, DPL transferred its interest in Beckjord, a coal-fired generation facility retired in 2014, including its obligations to remediate the facility and its site. The transfer resulted in cash expenditures of $15 million , inclusive of disposal charges, and a loss on disposal of $12 million . Prior to the transfer, Beckjord was reported in the US and Utilities SBU reportable segment. Advancion Energy Storage — In January 2018, the Company deconsolidated the AES Advancion energy storage development business and contributed it to the Fluence joint venture, resulting in a gain on sale of $23 million . See Note 8 —Investments in and Advances to Affiliates for further discussion. Prior to the transfer, the AES Advancion energy storage development business was reported as part of Corporate and Other. Zimmer and Miami Fort — In December 2017, DPL and AES Ohio Generation completed the sale of Zimmer and Miami Fort, two coal-fired generating plants, for net proceeds of $70 million , resulting in a gain on sale of $13 million . The sale did not meet the criteria to be reported as discontinued operations. Prior to their sale, Zimmer and Miami Fort were reported in the US and Utilities SBU reportable segment. Kazakhstan Hydroelectric — Affiliates of the Company (the “Affiliates”) previously operated Shulbinsk HPP and Ust-Kamenogorsk HPP (the “HPPs”), two hydroelectric plants in Kazakhstan, under a concession agreement with the Republic of Kazakhstan (“RoK”). In April 2017, the RoK initiated the process to transfer these plants back to the RoK. The RoK indicated that arbitration would be necessary to determine the correct Return Share Transfer Payment ("RST") and, rather than paying the Affiliates, deposited the RST into an escrow account. In exchange, the Affiliates transferred 100% of the shares in the HPPs to the RoK, under protest and with a full reservation of rights. The Company recorded a loss on disposal of $33 million in the fourth quarter of 2017. In February 2018, the Affiliates initiated the arbitration process in international court to recover at least $75 million of the RST placed in escrow, based on the September 30, 2017 RST calculation. As of December 31, 2019 , the arbitration proceedings are ongoing, and additional losses are not considered probable at this time. However, additional losses may be incurred if some or all of the disputed consideration is not paid by the RoK via a mutually acceptable settlement, or upon any unfavorable decision rendered by the arbiter. The transfer did not meet the criteria to be reported as discontinued operations. Prior to their transfer, the Kazakhstan HPPs were reported in the Eurasia SBU reportable segment. See Note 22 — Asset Impairment Expense for further information. Kazakhstan CHPs — In April 2017, the Company completed the sale of Ust-Kamenogorsk CHP and Sogrinsk CHP, its combined heating and power coal plants in Kazakhstan, for net proceeds of $24 million . The Company recognized a pre-tax loss on sale of $49 million , primarily related to cumulative translation losses. The sale did not meet the criteria to be reported as discontinued operations. Prior to their sale, the Kazakhstan CHP plants were reported in the Eurasia SBU reportable segment. See Note 22 — Asset Impairment Expense for further information. Excluding any impairment charge or gain/loss on sale, pre-tax income (loss) attributable to AES of disposed businesses was as follows (in millions): Year Ended December 31, 2019 2018 2017 Kilroot and Ballylumford $ (1 ) $ 35 $ 38 Stuart and Killen (1)(2) 52 77 17 Shady Point (5 ) 19 19 Masinloc — 9 103 Zimmer and Miami Fort — — 26 Kazakhstan Hydroelectric — — 33 Other — 21 39 Total $ 46 $ 161 $ 275 _____________________________ (1) After the retirement of Stuart and Killen in 2018, the Company entered into contracts to buy back all open capacity years for the plants at prices lower than the PJM capacity revenue prices. As such, the Company continued to earn capacity margin until the plants were transferred in December 2019. (2) Reductions in the asset retirement obligations for ash ponds and landfills at Stuart and Killen in 2018 resulted in a $32 million reduction to cost of sales. See Note 4 — Asset Retirement Obligations for further information.

Acquisitions Acquisitions

Acquisitions Acquisitions	12 Months Ended
	Dec. 31, 2019
Business Combinations [Abstract]
Acquisitions Disclosures [Text Block]	ACQUISITIONS Los Cururos — In November 2019, AES Gener completed the acquisition of the Los Cururos wind farm and transmission lines in Chile from EPM Chile S.A. for total consideration of $143 million , including $5 million in working capital adjustments paid in the first quarter of 2020. The transaction was accounted for as an asset acquisition, therefore the consideration transferred, plus transaction costs, was allocated to the individual assets acquired and liabilities assumed based on their relative fair values. Any differences arising from post-closing adjustments will be allocated accordingly. Los Cururos is reported in the South America SBU reportable segment. Distributed Energy — In December 2018, Distributed Energy acquired the outstanding noncontrolling interest in a partnership holding various solar projects from its tax equity partner for $23 million of consideration in a non-cash transaction through the assumption of debt, increasing the Company's ownership to 100% . The partnership was previously classified as an equity method investment. The transaction was accounted for as an asset acquisition, therefore the Company remeasured the equity investment at fair value and recognized a loss of $5 million in Other expense in the Consolidated Statement of Operations. The fair value of the investment, along with the consideration transferred, plus transaction costs, was allocated to the individual assets acquired and liabilities assumed based on their relative fair values. Distributed Energy is reported in the US and Utilities SBU reportable segment. Oahu — In November 2018, AES Oahu amended a 2017 agreement to acquire 100% of Na Pua Makani Power Partners, a partnership designed to develop and hold a wind project in Hawaii. The fair value of the initial consideration was $53 million , of which $48 million was contingent on meeting predefined development milestones. The transaction was accounted for as an acquisition of a variable interest entity that did not meet the definition of a business, therefore the assets acquired and liabilities assumed were recorded at their fair values, which equaled the fair value of the consideration. As a result of the amendment, the Company paid $11 million in 2018 and the contingent consideration was reduced to $5 million , resulting in a $32 million gain on remeasurement of contingent consideration recorded in Other income in the Consolidated Statement of Operations. AES Oahu is reported in the US and Utilities SBU reportable segment. Guaimbê Solar Complex — In September 2018, AES Tietê completed the acquisition of the Guaimbê Solar Complex (“Guaimbê”) from Cobra do Brasil for $152 million , comprised of the exchange of $119 million of non-convertible debentures in project financing and additional cash consideration of $33 million . The transaction was accounted for as an asset acquisition, therefore the consideration transferred, plus transaction costs, was allocated to the individual assets acquired and liabilities assumed based on their relative fair values. Guaimbê is reported in the South America SBU reportable segment. Alto Sertão II — In August 2017, the Company completed the acquisition of the Alto Sertão II Wind Complex (“Alto Sertão II”) from Renova Energia S.A. for $179 million , plus the assumption of $346 million of non-recourse debt. At closing, the Company made a cash payment of $143 million , which excluded holdbacks related to indemnifications. In September 2018, an additional $12 million was paid to settle a portion of the remaining indemnification liability. In the first quarter of 2018, the Company finalized the purchase price allocation related to the acquisition of Alto Sertão II. There were no significant adjustments made to the preliminary purchase price allocation recorded in the third quarter of 2017 when the acquisition was completed. The assets acquired and liabilities assumed at the acquisition date were recorded at fair value, including a contingent liability for earn-out payments of $18 million , based on the final purchase price allocation at March 31, 2018. Subsequent changes to the fair value of the earn-out payments will be reflected in earnings. Alto Sertão II is reported in the South America SBU reportable segment.

Earnings Per Share

Earnings Per Share	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
EARNINGS PER SHARE	EARNINGS PER SHARE Basic and diluted earnings per share are based on the weighted-average number of shares of common stock and potential common stock outstanding during the period. Potential common stock, for purposes of determining diluted earnings per share, includes the effects of dilutive RSUs and stock options. The effect of such potential common stock is computed using the treasury stock method. The following table is a reconciliation of the numerator and denominator of the basic and diluted earnings per share computation for income from continuing operations for the years ended December 31, 2019 , 2018 and 2017 , where income represents the numerator and weighted-average shares represent the denominator. Year Ended December 31, 2019 2018 2017 (in millions, except per share data) Income Shares $ per Share Income Shares $ per Share Loss Shares $ per Share BASIC EARNINGS (LOSS) PER SHARE Income (loss) from continuing operations attributable to The AES Corporation common stockholders $ 302 664 $ 0.46 $ 985 662 $ 1.49 $ (507 ) 660 $ (0.77 ) EFFECT OF DILUTIVE SECURITIES Restricted stock units — 3 (0.01 ) — 3 (0.01 ) — — — DILUTED EARNINGS (LOSS) PER SHARE $ 302 667 $ 0.45 $ 985 665 $ 1.48 $ (507 ) 660 $ (0.77 ) The calculation of diluted earnings per share excluded stock awards which would be anti-dilutive. The calculation of diluted earnings per share excluded 2 million and 7 million stock awards outstanding for the years ended December 31, 2018 and 2017 , respectively, that could potentially dilute basic earnings per share in the future. For the year ended December 31, 2017, the calculation of diluted earnings per share also excluded 4 million outstanding restricted stock units that could potentially dilute earnings per share in the future, because their impact would be anti-dilutive given the loss from continuing operations. Had the Company generated income, 2 million potential shares of common stock related to the restricted stock units would have been included in diluted weighted-average shares outstanding.

Risks and Uncertainties

Risks and Uncertainties	12 Months Ended
	Dec. 31, 2019
Risks and Uncertainties [Abstract]
RISKS AND UNCERTAINTIES	RISKS AND UNCERTAINTIES AES is a diversified power generation and utility company organized into four market-oriented SBUs. See additional discussion of the Company's principal markets in Note 18 — Segments and Geographic Information . Within our four SBUs, we have two primary lines of business: generation and utilities. The generation line of business uses a wide range of fuels and technologies to generate electricity such as coal, gas, hydro, wind, solar, and biomass. Our utilities business comprises businesses that transmit, distribute, and in certain circumstances, generate power. In addition, the Company has operations in the renewables area. These efforts include projects primarily in wind, solar, and energy storage. Operating and Economic Risks — The Company operates in several developing economies where macroeconomic conditions are typically more volatile than developed economies. Deteriorating market conditions and evolving industry expectations to transition away from fossil fuel sources for generation expose the Company to the risk of decreased earnings and cash flows due to, among other factors, adverse fluctuations in the commodities and foreign currency spot markets, and potential changes in the estimated useful lives of our coal-fired generation assets. Additionally, credit markets around the globe continue to tighten their standards, which could impact our ability to finance growth projects through access to capital markets. Currently, the Company has an investment grade rating from Fitch of BBB-, and a below-investment grade rating from Standard & Poor's of BB+ and Moody's of Ba1. This could affect the Company's ability to finance new and/or existing development projects at competitive interest rates. As of December 31, 2019 , the Company had $1 billion of unrestricted cash and cash equivalents. During 2019 , 68% of our revenue was generated outside the U.S. and a significant portion of our international operations is conducted in developing countries. We continue to invest in several developing countries to expand our existing platform and operations. International operations, particularly the operation, financing, and development of projects in developing countries, entail significant risks and uncertainties, including, without limitation: • economic, social, and political instability in any particular country or region; • inability to economically hedge energy prices; • volatility in commodity prices; • adverse changes in currency exchange rates; • government restrictions on converting currencies or repatriating funds; • unexpected changes in foreign laws, regulatory framework, or in trade, monetary or fiscal policies; • high inflation and monetary fluctuations; • restrictions on imports of solar panels, wind turbines, coal, oil, gas, or other raw materials required by our generation businesses to operate; • threatened or consummated expropriation or nationalization of our assets by foreign governments; • unwillingness of governments, government agencies, similar organizations, or other counterparties to honor their commitments; • unwillingness of governments, government agencies, courts, or similar bodies to enforce contracts that are economically advantageous to subsidiaries of the Company and economically unfavorable to counterparties, against such counterparties, whether such counterparties are governments or private parties; • inability to obtain access to fair and equitable political, regulatory, administrative, and legal systems; • adverse changes in government tax policy; • potentially adverse tax consequences of operating in multiple jurisdictions; and • difficulties in enforcing our contractual rights, enforcing judgments, or obtaining a just result in local jurisdictions. Any of these factors, individually or in combination with others, could materially and adversely affect our business, results of operations, and financial condition. In addition, our Latin American operations experience volatility in revenue and earnings which have caused and are expected to cause significant volatility in our results of operations and cash flows. The volatility is caused by regulatory and economic difficulties, political instability, indexation of certain PPAs to fuel prices, and currency fluctuations being experienced in many of these countries. This volatility reduces the predictability and enhances the uncertainty associated with cash flows from these businesses. Our inability to predict, influence or respond appropriately to changes in law or regulatory schemes, including any inability to obtain reasonable increases in tariffs or tariff adjustments for increased expenses, could adversely impact our results of operations or our ability to meet publicly announced projections or analysts' expectations. Furthermore, changes in laws or regulations or changes in the application or interpretation of regulatory provisions in jurisdictions where we operate, particularly our utility businesses where electricity tariffs are subject to regulatory review or approval, could adversely affect our business, including, but not limited to: • changes in the determination, definition, or classification of costs to be included as reimbursable or pass-through costs; • changes in the definition or determination of controllable or noncontrollable costs; • adverse changes in tax law; • changes in the definition of events which may or may not qualify as changes in economic equilibrium; • changes in the timing of tariff increases; • other changes in the regulatory determinations under the relevant concessions; or • changes in environmental regulations, including regulations relating to GHG emissions in any of our businesses. Any of the above events may result in lower margins for the affected businesses, which can adversely affect our results of operations. Goodwill — The Company considers a reporting unit at risk of impairment when its fair value does not exceed its carrying amount by more than 10%. During the annual goodwill impairment test performed as of October 1, 2019, the Company determined that the fair value of its Gener reporting unit exceeded its carrying value by 3% . Therefore, Gener's $868 million goodwill balance was considered to be "at risk" as of December 31, 2019 , largely due to the Chilean Government's announcement to phase out coal generation by 2040, and a decline in long-term energy prices. The Company monitors its reporting units at risk of impairment for interim impairment indicators, and believes that the estimates and assumptions used in the calculations are reasonable as of December 31, 2019 . Should the fair value of any of the Company’s reporting units fall below its carrying amount because of reduced operating performance, market declines, changes in the discount rate, regulatory changes, or other adverse conditions, goodwill impairment charges may be necessary in future periods. Foreign Currency Risks — AES operates businesses in many foreign countries and such operations could be impacted by significant fluctuations in foreign currency exchange rates. Fluctuations in currency exchange rate between the USD and the following currencies could create significant fluctuations in earnings and cash flows: the Argentine peso, the Brazilian real, the Chilean peso, the Colombian peso, the Dominican Republic peso, the Euro, the Indian rupee, and the Mexican peso. Argentina — In September 2019, currency controls were established by the Argentine government in order to control the devaluation of the Argentine peso and keep Argentine central bank reserves at acceptable levels. Restrictions on the flow of capital have limited the availability of international credit, and economic conditions in Argentina have further deteriorated, triggering additional devaluation of the Argentine peso and a deterioration of the country’s risk profile. Concentrations — Due to the geographical diversity of its operations, the Company does not have any significant concentration of customers or sources of fuel supply. Several of the Company's generation businesses rely on PPAs with one or a limited number of customers for the majority of, and in some cases all of, the relevant businesses' output over the term of the PPAs. However, no single customer accounted for 10% or more of total revenue in 2019 , 2018 or 2017 . The cash flows and results of operations of our businesses depend on the credit quality of our customers and the continued ability of our customers and suppliers to meet their obligations under PPAs and fuel supply agreements. If a substantial portion of the Company's long-term PPAs and/or fuel supply were modified or terminated, the Company would be adversely affected to the extent that it would be unable to replace such contracts at equally favorable terms.

Related Party Transactions

Related Party Transactions	12 Months Ended
	Dec. 31, 2019
Related Party Transactions [Abstract]
RELATED PARTY TRANSACTIONS	RELATED PARTY TRANSACTIONS Certain of our businesses in Panama and the Dominican Republic are partially owned by governments either directly or through state-owned institutions. In the ordinary course of business, these businesses enter into energy purchase and sale transactions, and transmission agreements with other state-owned institutions which are controlled by such governments. At two of our generation businesses in Mexico, the offtakers exercise significant influence, but not control, through representation on these businesses' Boards of Directors. These offtakers are also required to hold a nominal ownership interest in such businesses. In Chile, we provide capacity and energy under contractual arrangements to our investment which is accounted for under the equity method of accounting. Additionally, the Company provides certain support and management services to several of its affiliates under various agreements. The Company's Consolidated Statements of Operations included the following transactions with related parties for the periods indicated (in millions): Years Ended December 31, 2019 2018 2017 Revenue—Non-Regulated $ 1,544 $ 1,533 $ 1,297 Cost of Sales—Non-Regulated 531 342 220 Interest income 21 14 8 Interest expense 74 54 36 The following table summarizes the balances receivable from and payable to related parties included in the Company's Consolidated Balance Sheets as of the periods indicated (in millions): December 31, 2019 2018 Receivables from related parties $ 370 $ 371 Accounts and notes payable to related parties (1) 1,976 754 _____________________________ (1) Includes $1.1 billion of debt to Mong Duong Finance Holdings B.V., an SPV accounted for as an equity affiliate as of December 31, 2019 (See Note 11 — Debt ); $415 million and $382 million of debt to Banco General S.A., a bank in Panama where our minority partner in Colon is part of its board of directors as of December 31, 2019 and 2018, respectively; and $287 million and $165 million of debt to Strabag, our EPC contractor and minority partner in Alto Maipo as of December 31, 2019 and 2018, respectively.

Selected Quarterly Financial Da

Selected Quarterly Financial Data	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED)	SELECTED QUARTERLY FINANCIAL DATA (UNAUDITED) Quarterly Financial Data — The following tables summarize the unaudited quarterly Condensed Consolidated Statements of Operations for the Company for 2019 and 2018 (amounts in millions, except per share data). Amounts have been restated to reflect discontinued operations in all periods presented and reflect all adjustments necessary in the opinion of management for a fair statement of the results for interim periods. Quarter Ended 2019 Mar 31 Jun 30 Sep 30 Dec 31 Revenue $ 2,650 $ 2,483 $ 2,625 $ 2,431 Operating margin 586 502 701 560 Income (loss) from continuing operations, net of tax (1) 233 66 298 (120 ) Income from discontinued operations, net of tax — 1 — — Net income (loss) $ 233 $ 67 $ 298 $ (120 ) Net income (loss) attributable to The AES Corporation $ 154 $ 17 $ 210 $ (78 ) Basic earnings (loss) per share: Income (loss) from continuing operations attributable to The AES Corporation common stockholders, net of tax $ 0.23 $ 0.02 $ 0.32 $ (0.12 ) Income from discontinued operations attributable to The AES Corporation common stockholders, net of tax — — — — Net income (loss) attributable to The AES Corporation common stockholders $ 0.23 $ 0.02 $ 0.32 $ (0.12 ) Diluted earnings (loss) per share: Income (loss) from continuing operations attributable to The AES Corporation common stockholders, net of tax $ 0.23 $ 0.02 $ 0.32 $ (0.12 ) Income from discontinued operations attributable to The AES Corporation common stockholders, net of tax — — — — Net income (loss) attributable to The AES Corporation common stockholders $ 0.23 $ 0.02 $ 0.32 $ (0.12 ) Dividends declared per common share $ 0.14 $ — $ 0.14 $ 0.28 Quarter Ended 2018 Mar 31 Jun 30 Sep 30 Dec 31 Revenue $ 2,740 $ 2,537 $ 2,837 $ 2,622 Operating margin 656 600 671 646 Income from continuing operations, net of tax (2) 778 224 192 155 Income (loss) from discontinued operations, net of tax (3) (1 ) 192 (1 ) 26 Net income $ 777 $ 416 $ 191 $ 181 Net income attributable to The AES Corporation $ 684 $ 290 $ 101 $ 128 Basic earnings per share: Income from continuing operations attributable to The AES Corporation common stockholders, net of tax $ 1.04 $ 0.15 $ 0.15 $ 0.15 Income from discontinued operations attributable to The AES Corporation common stockholders, net of tax — 0.29 — 0.04 Net income attributable to The AES Corporation common stockholders $ 1.04 $ 0.44 $ 0.15 $ 0.19 Diluted earnings per share: Income from continuing operations attributable to The AES Corporation common stockholders, net of tax $ 1.03 $ 0.15 $ 0.15 $ 0.15 Income from discontinued operations attributable to The AES Corporation common stockholders, net of tax — 0.29 — 0.04 Net income attributable to The AES Corporation common stockholders $ 1.03 $ 0.44 $ 0.15 $ 0.19 Dividends declared per common share $ 0.13 $ — $ 0.13 $ 0.27 _____________________________ (1) Includes pre-tax impairment expense of $116 million and $69 million , in the second and fourth quarters of 2019 , respectively (See Note 22 — Asset Impairment Expense ), other-than-temporary impairment of OPGC of $92 million and net equity in losses of affiliates, primarily at Guacolda, of $175 million , in the fourth quarter of 2019 (See Note 8 — Investments in and Advances to Affiliates ). (2) Includes pre-tax gains on sales of business interests of $788 million , $89 million and $128 million , in the first, second and fourth quarters of 2018 , respectively, and pre-tax losses of $21 million in the third quarter of 2018 (See Note 25 — Held-for-Sale and Dispositions ), pre-tax impairment expense of $92 million , $74 million and $42 million , in the second, third and fourth quarters of 2018 , respectively (See Note 22 — Asset Impairment Expense ), other-than-temporary impairment of Guacolda of $144 million in the fourth quarter of 2018 (See Note 8 — Investments in and Advances to Affiliates ), SAB 118 charges to finalize the provisional estimate of one-time transition tax on foreign earnings of $33 million and $161 million in the third and fourth quarters of 2018 , respectively, and a SAB 118 income tax benefit to finalize the provisional estimate of remeasurement of deferred tax assets and liabilities to the lower corporate tax rate of $77 million in the fourth quarter of 2018 (See Note 23 — Income Taxes ). (3) Includes gain on sale of Eletropaulo of $199 million in the second quarter of 2018 (See Note 24 — Discontinued Operations ).

Schedule I - Condensed Financia

Schedule I - Condensed Financial Information of Parent	12 Months Ended
	Dec. 31, 2019
Condensed Financial Information Disclosure [Abstract]
SCHEDULE I CONDENSED FINANCIAL INFORMATION OF PARENT	THE AES CORPORATION SCHEDULE I CONDENSED FINANCIAL INFORMATION OF PARENT BALANCE SHEETS December 31, 2019 2018 (in millions) ASSETS Current Assets: Cash and cash equivalents $ 11 $ 19 Accounts and notes receivable from subsidiaries 238 285 Prepaid expenses and other current assets 35 31 Total current assets 284 335 Investment in and advances to subsidiaries and affiliates 6,782 6,834 Office Equipment: Cost 27 27 Accumulated depreciation (20 ) (19 ) Office equipment, net 7 8 Other Assets: Other intangible assets, net of accumulated amortization 1 3 Deferred financing costs, net of accumulated amortization of $5 and $4, respectively 5 4 Deferred income taxes 14 24 Other assets 16 2 Total other assets 36 33 Total assets $ 7,109 $ 7,210 LIABILITIES AND STOCKHOLDERS' EQUITY Current Liabilities: Accounts payable $ 20 $ 15 Accounts and notes payable to subsidiaries 339 74 Accrued and other liabilities 221 206 Senior notes payable—current portion 5 5 Total current liabilities 585 300 Long-term Liabilities: Senior notes payable 3,391 3,650 Accounts and notes payable to subsidiaries 28 28 Other long-term liabilities 109 24 Total long-term liabilities 3,528 3,702 Stockholders' equity: Common stock 8 8 Additional paid-in capital 7,776 8,154 Accumulated deficit (692 ) (1,005 ) Accumulated other comprehensive loss (2,229 ) (2,071 ) Treasury stock (1,867 ) (1,878 ) Total stockholders' equity 2,996 3,208 Total liabilities and equity $ 7,109 $ 7,210 See Notes to Schedule I. THE AES CORPORATION SCHEDULE I CONDENSED FINANCIAL INFORMATION OF PARENT STATEMENTS OF OPERATIONS For the Years Ended December 31, 2019 2018 2017 (in millions) Revenue from subsidiaries and affiliates $ 30 $ 36 $ 28 Equity in earnings of subsidiaries and affiliates 674 1,909 630 Interest income 53 39 49 General and administrative expenses (148 ) (142 ) (158 ) Other income 1 25 5 Other expense (103 ) — (554 ) Loss on extinguishment of debt (5 ) (171 ) (92 ) Interest expense (197 ) (220 ) (317 ) Income (loss) before income taxes 305 1,476 (409 ) Income tax (expense) (2 ) (273 ) (752 ) Net income (loss) $ 303 $ 1,203 $ (1,161 ) See Notes to Schedule I. THE AES CORPORATION SCHEDULE I CONDENSED FINANCIAL INFORMATION OF PARENT STATEMENTS OF COMPREHENSIVE INCOME (LOSS) YEARS ENDED DECEMBER 31, 2019 , 2018 , AND 2017 2019 2018 2017 (in millions) NET INCOME (LOSS) $ 303 $ 1,203 $ (1,161 ) Foreign currency translation activity: Foreign currency translation adjustments, net of income tax benefit of $1, $2 and $11, respectively (23 ) (214 ) 18 Reclassification to earnings, net of $0 income tax for all periods 23 (21 ) 643 Total foreign currency translation adjustments, net of tax — (235 ) 661 Derivative activity: Change in derivative fair value, net of income tax benefit of $53, $16 and $13, respectively (202 ) (64 ) (14 ) Reclassification to earnings, net of income tax benefit (expense) of $(4), $(13) and $1, respectively 36 78 37 Total change in fair value of derivatives, net of tax (166 ) 14 23 Pension activity: Prior service cost for the period, net of income tax expense of $0, $1 and $1, respectively 1 (2 ) 1 Change in pension adjustments due to net actuarial gain (loss) for the period, net of income tax benefit (expense) of $6, $(1) and $6, respectively (16 ) 2 (20 ) Reclassification of earnings, net of income tax expense of $13, $2 and $126, respectively 27 7 248 Total change in unfunded pension obligation 12 7 229 OTHER COMPREHENSIVE INCOME (LOSS) (154 ) (214 ) 913 COMPREHENSIVE INCOME (LOSS) $ 149 $ 989 $ (248 ) See Notes to Schedule I. THE AES CORPORATION SCHEDULE I CONDENSED FINANCIAL INFORMATION OF PARENT STATEMENTS OF CASH FLOWS For the Years Ended December 31, 2019 2018 2017 (in millions) Net cash provided by operating activities $ 583 $ 409 $ 148 Investing Activities: Proceeds from the sale of business interests, net of expenses 196 1,222 — Investment in and net advances to subsidiaries (596 ) (216 ) (339 ) Return of capital 411 242 243 Additions to property, plant and equipment (8 ) (13 ) (13 ) Net cash provided by (used in) investing activities 3 1,235 (109 ) Financing Activities: (Repayments) Borrowings under the revolver, net 180 (207 ) 207 Borrowings of notes payable and other coupon bearing securities — 1,000 1,025 Repayments of notes payable and other coupon bearing securities (450 ) (1,933 ) (1,353 ) Loans from (Repayments to) subsidiaries 40 (143 ) 309 Proceeds from issuance of common stock 6 7 1 Common stock dividends paid (362 ) (344 ) (317 ) Payments for deferred financing costs (3 ) (11 ) (12 ) Other financing (4 ) (5 ) (7 ) Net cash used in financing activities (593 ) (1,636 ) (147 ) Effect of exchange rate changes on cash (1 ) 1 6 Increase (Decrease) in cash and cash equivalents (8 ) 9 (102 ) Cash and cash equivalents, beginning 19 10 112 Cash and cash equivalents, ending $ 11 $ 19 $ 10 Supplemental Disclosures: Cash payments for interest, net of amounts capitalized $ 192 $ 232 $ 282 Cash payments (refunds) for income taxes $ (5 ) $ 10 $ 2 SCHEDULE I NOTES TO SCHEDULE I 1. Application of Significant Accounting Principles The Schedule I Condensed Financial Information of the Parent includes the accounts of The AES Corporation (the “Parent Company”) and certain holding companies. ACCOUNTING FOR SUBSIDIARIES AND AFFILIATES — The Parent Company has accounted for the earnings of its subsidiaries on the equity method in the financial information. INCOME TAXES — Positions taken on the Parent Company's income tax return which satisfy a more-likely-than-not threshold will be recognized in the financial statements. The income tax expense or benefit computed for the Parent Company reflects the tax assets and liabilities on a stand-alone basis and the effect of filing a consolidated U.S. income tax return with certain other affiliated companies as well as effects of U.S. tax law reform enacted in 2017. ACCOUNTS AND NOTES RECEIVABLE FROM SUBSIDIARIES — Amounts have been shown in current or long-term assets based on terms in agreements with subsidiaries, but payment is dependent upon meeting conditions precedent in the subsidiary loan agreements. 2. Debt Senior and Secured Notes and Loans Payable ($ in millions) December 31, Interest Rate Maturity 2019 2018 Senior Unsecured Note 4.00% 2021 500 500 Senior Secured Term Loan LIBOR + 1.75% 2022 18 366 Senior Unsecured Note 4.875% 2023 613 713 Senior Unsecured Note 4.50% 2023 500 500 Drawings on secured credit facility LIBOR + 1.75% 2024 180 — Senior Unsecured Note 5.50% 2024 63 63 Senior Unsecured Note 5.50% 2025 544 544 Senior Unsecured Note 6.00% 2026 500 500 Senior Unsecured Note 5.125% 2027 500 500 Unamortized (discounts)/premiums & debt issuance (costs) (22 ) (31 ) Subtotal $ 3,396 $ 3,655 Less: Current maturities (5 ) (5 ) Total $ 3,391 $ 3,650 FUTURE MATURITIES OF RECOURSE DEBT — As of December 31, 2019 scheduled maturities are presented in the following table (in millions): December 31, Annual Maturities 2020 $ 5 2021 505 2022 8 2023 1,113 2024 243 Thereafter 1,544 Unamortized (discount)/premium & debt issuance (costs) (22 ) Total debt $ 3,396 3. Dividends from Subsidiaries and Affiliates Cash dividends received from consolidated subsidiaries were $1.0 billion , $1.9 billion and $1.2 billion for the years ended December 31, 2019 , 2018 , and 2017 , respectively. For the years ended December 31, 2019 and 2018 , $200 million and $1.2 billion , respectively, of the dividends paid to the Parent Company are derived from the sale of business interests and are classified as an investing activity for cash flow purposes. All other dividends are classified as operating activities. There were no cash dividends received from affiliates accounted for by the equity method for the years ended December 31, 2019 , 2018 , and 2017 . 4. Guarantees and Letters of Credit GUARANTEES — In connection with certain project financing, acquisitions and dispositions, power purchases and other agreements, the Parent Company has expressly undertaken limited obligations and commitments, most of which will only be effective or will be terminated upon the occurrence of future events. These obligations and commitments, excluding those collateralized by letter of credit and other obligations discussed below, were limited as of December 31, 2019 by the terms of the agreements, to an aggregate of approximately $865 million , representing 38 agreements with individual exposures ranging up to $157 million . These amounts exclude normal and customary representations and warranties in agreements for the sale of assets (including ownership in associated legal entities) where the associated risk is considered to be nominal. LETTERS OF CREDIT — At December 31, 2019 , the Parent Company had $19 million in letters of credit outstanding under the senior secured credit facility, representing 28 agreements with individual exposures up to $4 million , and $342 million in letters of credit outstanding under the senior unsecured credit facility, representing 11 agreements with individual exposures ranging from $1 million to $296 million . During the year ended December 31, 2019 , the Parent Company paid letter of credit fees ranging from 1% to 3% per annum on the outstanding amounts.

General and Summary of Signif_2

General and Summary of Significant Accounting Policies (Policies)	12 Months Ended
	Dec. 31, 2019
Accounting Policies [Abstract]
PRINCIPLES OF CONSOLIDATION	PRINCIPLES OF CONSOLIDATION — The consolidated financial statements of the Company include the accounts of The AES Corporation and its controlled subsidiaries. Furthermore, VIEs in which the Company has an ownership interest and is the primary beneficiary, thus controlling the VIE, have been consolidated. Intercompany transactions and balances are eliminated in consolidation. Investments in entities where the Company has the ability to exercise significant influence, but not control, are accounted for using the equity method of accounting.
USE OF ESTIMATES	USE OF ESTIMATES — U.S. GAAP requires the Company to make estimates and assumptions that affect the asset and liability balances reported as of the date of the consolidated financial statements, as well as the revenues and expenses recognized during the reporting period. Actual results could differ from those estimates. Items subject to such estimates and assumptions include: the carrying amount and estimated useful lives of long-lived assets; asset retirement obligations; impairment of goodwill, long-lived assets and equity method investments; valuation allowances for receivables and deferred tax assets; the recoverability of regulatory assets; regulatory liabilities; the fair value of financial instruments; the fair value of assets and liabilities acquired as business combinations or as asset acquisitions by variable interest entities; contingent consideration arising from business combinations or asset acquisitions by variable interest entities; the measurement of equity method investments or noncontrolling interest using the HLBV method for certain renewable generation partnerships; the determination of whether a sale of noncontrolling interests is considered to be a sale of in-substance real estate (as opposed to an equity transaction); pension liabilities; the incremental borrowing rates used in the determination of lease liabilities; the determination of lease and non-lease components in certain generation contracts; environmental liabilities; and potential litigation claims and settlements.
Held-for-sale and Disposal Groups [Policy Text Block]	HELD-FOR-SALE DISPOSAL GROUPS — A disposal group classified as held-for-sale is reflected on the balance sheet at the lower of its carrying amount or estimated fair value less cost to sell. A loss is recognized if the carrying amount of the disposal group exceeds its estimated fair value less cost to sell. This loss is limited to the carrying value of long-lived assets until the completion of the sale, at which point, any additional loss is recognized. If the fair value of the disposal group subsequently exceeds the carrying amount while the disposal group is still held-for-sale, any impairment expense previously recognized will be reversed up to the lesser of the previously recognized expense or the subsequent excess. Assets and liabilities related to a disposal group classified as held-for-sale are segregated in the current balance sheet in the period in which the disposal group is classified as held-for-sale. Assets and liabilities of held-for-sale disposal groups are classified as current when they are expected to be disposed of within twelve months. Transactions between the held-for-sale disposal group and businesses that are expected to continue to exist after the disposal are not eliminated to appropriately reflect the continuing operations and balances held-for-sale. See Note 25 — Held-for-Sale and Dispositions for further information.
DISCONTINUED OPERATIONS AND RECLASSIFICATIONS	DISCONTINUED OPERATIONS — Discontinued operations reporting occurs only when the disposal of a business or a group of businesses represents a strategic shift that has (or will have) a major effect on the Company's operations and financial results. The Company reports financial results for discontinued operations separately from continuing operations to distinguish the financial impact of disposal transactions from ongoing operations. Prior period amounts in the Consolidated Statements of Operations and Consolidated Balance Sheets are retrospectively revised to reflect the businesses determined to be discontinued operations. The cash flows of businesses that are determined to be discontinued operations are included within the relevant categories within operating, investing and financing activities on the face of the Consolidated Statements of Cash Flows. Transactions between the businesses determined to be discontinued operations and businesses that are expected to continue to exist after the disposal are not eliminated to appropriately reflect the continuing operations and balances held-for-sale. The results of discontinued operations include any gain or loss recognized on closing or adjustment of the carrying amount to fair value less cost to sell, including gains or losses associated with noncontrolling interests upon completion of the disposal transaction. Adjustments related to components previously reported as discontinued operations under prior accounting guidance are presented as discontinued operations in the current period even if the disposed-of component to which the adjustments are related would not meet the criteria for presentation as a discontinued operation under current guidance. See Note 24 — Discontinued Operations for further information.
FAIR VALUE	FAIR VALUE — Fair value is the price that would be received to sell an asset or paid to transfer a liability in an orderly, hypothetical transaction between market participants at the measurement date, or exit price. The Company applies the fair value measurement accounting guidance to financial assets and liabilities in determining the fair value of investments in marketable debt and equity securities, included in the Consolidated Balance Sheet line items Short-term investments and Other noncurrent assets ; derivative assets, included in Other current assets and Other noncurrent assets ; and, derivative liabilities, included in Accrued and other liabilities (current) and Other noncurrent liabilities . The Company applies the fair value measurement guidance to nonfinancial assets and liabilities upon the acquisition of a business or an asset acquisition by a variable interest entity, or in conjunction with the measurement of an asset retirement obligation or a potential impairment loss on an asset group, equity method investments, or goodwill. When determining the fair value measurements for assets and liabilities required to be reflected at their fair values, the Company considers the principal or most advantageous market in which it would transact and considers assumptions that market participants would use when pricing the assets or liabilities, such as inherent risk, transfer restrictions and risk of nonperformance. The Company is prohibited from including transaction costs and any adjustments for blockage factors in determining fair value. In determining fair value measurements, the Company maximizes the use of observable inputs and minimizes the use of unobservable inputs. Assets and liabilities are categorized within a fair value hierarchy based upon the lowest level of input that is significant to the fair value measurement: • Level 1: Quoted prices in active markets for identical assets or liabilities; • Level 2: Inputs other than Level 1 that are observable, either directly or indirectly, such as quoted prices in active markets for similar assets or liabilities, quoted prices for identical or similar assets or liabilities in markets that are not active or other inputs that are observable or can be corroborated by observable market data for substantially the full term of the assets or liabilities; or • Level 3: Unobservable inputs that are supported by little or no market activity and that are significant to the fair values of the assets or liabilities. Any transfers between all levels within the fair value hierarchy levels are recognized at the end of the reporting period.
CASH AND CASH EQUIVALENTS	CASH AND CASH EQUIVALENTS — The Company considers unrestricted cash on hand, cash balances not restricted as to withdrawal or usage, deposits in banks, certificates of deposit and short-term marketable securities with original maturities of three months or less to be cash and cash equivalents.
RESTRICTED CASH AND DEBT SERVICE RESERVES	RESTRICTED CASH AND DEBT SERVICE RESERVES — Cash balances restricted as to withdrawal or usage, primarily via contract, are considered restricted cash. The following table provides a summary of cash, cash equivalents, and restricted cash amounts reported on the Consolidated Balance Sheets that reconcile to the total of such amounts as shown on the Consolidated Statements of Cash Flows (in millions): December 31, 2019 December 31, 2018 Cash and cash equivalents $ 1,029 $ 1,166 Restricted cash 336 370 Debt service reserves and other deposits 207 467 Cash, Cash Equivalents and Restricted Cash $ 1,572 $ 2,003
INVESTMENTS IN MARKETABLE SECURITIES	INVESTMENTS IN MARKETABLE SECURITIES — The Company's marketable investments are primarily unsecured debentures, certificates of deposit, government debt securities and money market funds. Short-term investments consist of marketable equity securities and debt securities with original maturities in excess of three months with remaining maturities of less than one year. Marketable debt securities where the Company has both the positive intent and ability to hold to maturity are classified as held-to-maturity and are carried at amortized cost. Remaining marketable debt securities are classified as available-for-sale or trading and are carried at fair value. Unrealized gains or losses on available-for-sale debt securities are reflected in AOCL, a separate component of equity, and the Consolidated Statements of Operations, respectively. Unrealized gains or losses on equity investments are reported in Other income . Interest and dividends on investments are reported in Interest income and Other income , respectively. Gains and losses on sales of investments are determined using the specific identification method.
ACCOUNTS AND NOTES RECEIVABLE AND ALLOWANCE FOR DOUBTFUL ACCOUNTS	ACCOUNTS AND NOTES RECEIVABLE AND ALLOWANCE FOR DOUBTFUL ACCOUNTS — Accounts and notes receivable are carried at amortized cost. The Company periodically assesses the collectability of accounts receivable, considering factors such as historical collection experience, the age of accounts receivable and other currently available evidence supporting collectability, and records an allowance for doubtful accounts for the estimated uncollectible amount as appropriate. Certain of our businesses charge interest on accounts receivable. Interest income is recognized on an accrual basis. When collection of such interest is not reasonably assured, interest income is recognized as cash is received. Individual accounts and notes receivable are written off when they are no longer deemed collectible.
INVENTORY	INVENTORY — Inventory primarily consists of fuel and other raw materials used to generate power, and operational spare parts and supplies used to maintain power generation and distribution facilities. Inventory is carried at lower of cost or net realizable value. Cost is the sum of the purchase price and expenditures incurred to bring the inventory to its existing location. Inventory is primarily valued using the average cost method. Generally, if it is expected fuel inventory will not be recovered through revenue earned from power generation, an impairment is recognized to reflect the fuel at market value. The carrying amount of spare parts and supplies is typically reduced only in instances where the items are considered obsolete.
LONG-LIVED ASSETS	LONG-LIVED ASSETS — Long-lived assets include property, plant and equipment, assets under finance leases and intangible assets subject to amortization (i.e., finite-lived intangible assets). Property, plant and equipment — Property, plant and equipment are stated at cost, net of accumulated depreciation. The cost of renewals and improvements that extend the useful life of property, plant and equipment are capitalized. Construction progress payments, engineering costs, insurance costs, salaries, interest and other costs directly relating to construction in progress are capitalized during the construction period, provided the completion of the construction project is deemed probable, or expensed at the time construction completion is determined to no longer be probable. The continued capitalization of such costs is subject to risks related to successful completion, including those related to government approvals, site identification, financing, construction permitting and contract compliance. Construction-in-progress balances are transferred to electric generation and distribution assets when an asset group is ready for its intended use. Government subsidies, liquidated damages recovered for construction delays, and income tax credits are recorded as a reduction to property, plant and equipment and reflected in cash flows from investing activities. Maintenance and repairs are charged to expense as incurred. Depreciation, after consideration of salvage value and asset retirement obligations, is computed using the straight-line method over the estimated useful lives of the assets, which are determined on a composite or component basis. Capital spare parts, including rotable spare parts, are included in electric generation and distribution assets. If the spare part is considered a component, it is depreciated over its useful life after the part is placed in service. If the spare part is deemed part of a composite asset, the part is depreciated over the composite useful life even when being held as a spare part. Certain of the Company's subsidiaries operate under concession contracts. Certain estimates are utilized to determine depreciation expense for the subsidiaries, including the useful lives of the property, plant and equipment and the amounts to be recovered at the end of the concession contract. The amounts to be recovered under these concession contracts are based on estimates that are inherently uncertain and actual amounts recovered may differ from those estimates. These concession contracts are not within the scope of ASC 853— Service Concession Arrangements .
INTANGIBLE ASSETS SUBJECT TO AMORTIZATION	Intangible Assets Subject to Amortization — Finite-lived intangible assets are amortized over their useful lives which range from 1 – 50 years and are included in the Consolidated Balance Sheet line item Other intangible assets. The Company accounts for purchased emission allowances as intangible assets and records an expense when they are utilized or sold. Granted emission allowances are valued at zero.
IMPAIRMENT OF LONG-LIVED ASSETS	Impairment of Long-lived Assets — When circumstances indicate the carrying amount of long-lived assets in a held-for-use asset group may not be recoverable, the Company evaluates the assets for potential impairment using internal projections of undiscounted cash flows resulting from the use and eventual disposal of the assets. Events or changes in circumstances that may necessitate a recoverability evaluation include, but are not limited to, adverse changes in the regulatory environment, unfavorable changes in power prices or fuel costs, increased competition due to additional capacity in the grid, technological advancements, declining trends in demand, or an expectation it is more likely than not that the asset will be disposed of before the end of its previously estimated useful life. If the carrying amount of the assets exceeds the undiscounted cash flows, an impairment expense is recognized for the amount by which the carrying amount of the asset group exceeds its fair value (subject to the carrying amount not being reduced below fair value for any individual long-lived asset that is determinable without undue cost and effort). An impairment expense for certain assets may be reduced by the establishment of a regulatory asset if recovery through approved rates is probable.
DEFERRED FINANCING COSTS	DEBT ISSUANCE COSTS — Costs incurred in connection with the issuance of long-term debt are deferred and presented as a direct reduction from the face amount of that debt and amortized over the related financing period using the effective interest method. Debt issuance costs related to a line-of-credit or revolving credit facility are deferred and presented as an asset and amortized over the related financing period. Make-whole payments in connection with early debt retirements are classified as cash flows used in financing activities.
EQUITY METHOD INVESTMENTS	EQUITY METHOD INVESTMENTS — Investments in entities over which the Company has the ability to exercise significant influence, but not control, are accounted for using the equity method of accounting and reported in Investments in and advances to affiliates on the Consolidated Balance Sheets. The Company’s proportionate share of the net income or loss of these companies is included in Net equity in earnings (losses) of affiliates on the Consolidated Statements of Operations . The Company utilizes the cumulative earning approach to determine whether distributions received from equity method investees are returns on investment or returns of investment. The Company discontinues the application of the equity method when an investment is reduced to zero and the Company is not otherwise committed to provide further financial support to the investee. The Company resumes the application of the equity method accounting to the extent that net income is greater than the share of net losses not previously recorded. Upon acquiring the investment, we determine the fair value of the identifiable assets and assumed liabilities and the basis difference between each fair value and the carrying amount of the corresponding asset or liability in the financial statements of the investee. The AES share of the amortization of the basis difference is recognized in Net equity in earnings of affiliates in the Consolidated Statements of Operations over the life of the asset or liability. The Company periodically assesses if impairment indicators exist at our equity method investments. When an impairment is observed, any excess of the carrying amount over its estimated fair value is recognized as impairment expense when the loss in value is deemed other-than-temporary and included in Other non-operating expense in the Consolidated Statements of Operations.
GOODWILL AND INDEFINITE-LIVED INTANGIBLE ASSETS	GOODWILL AND INDEFINITE-LIVED INTANGIBLE ASSETS — The Company evaluates goodwill and indefinite-lived intangible assets for impairment on an annual basis and whenever events or changes in circumstances necessitate an evaluation for impairment. The Company's annual impairment testing date is October 1 st . Goodwill — Goodwill represents the excess of the purchase price of the business acquisition over the fair value of identifiable net assets acquired. Goodwill resulting from an acquisition is assigned to the reporting units that are expected to benefit from the synergies of the acquisition. Generally, each AES business with a goodwill balance constitutes a reporting unit as they are not similar to other businesses in a segment nor are they reported to segment management together with other businesses. Goodwill is evaluated for impairment either under the qualitative assessment option or the quantitative test option to determine the fair value of the reporting unit. If goodwill is determined to be impaired, an impairment loss measured at the amount by which the reporting unit’s carrying amount exceeds its fair value, not to exceed the carrying amount of goodwill, is recorded. Indefinite-Lived Intangible Assets — The Company's indefinite-lived intangible assets primarily include land-use rights and water rights. Indefinite-lived intangible assets are evaluated for impairment either under the qualitative assessment option or the two-step quantitative test. If the carrying amount of an intangible asset being tested for impairment exceeds its fair value, the excess is recognized as impairment expense.
ACCOUNTS PAYABLE AND OTHER ACCRUED LIABILITIES	ACCOUNTS PAYABLE AND OTHER ACCRUED LIABILITIES — Accounts payable consists of amounts due to trade creditors related to the Company's core business operations. These payables include amounts owed to vendors and suppliers for items such as energy purchased for resale, fuel, maintenance, inventory and other raw materials. Other accrued liabilities include items such as income taxes, regulatory liabilities, legal contingencies and employee-related costs, including payroll, and benefits.
REGULATORY ASSETS AND LIABILITIES	REGULATORY ASSETS AND LIABILITIES — The Company recognizes assets and liabilities that result from regulated ratemaking processes. Regulatory assets generally represent incurred costs which have been deferred due to the probable future recovery via customer rates. Generally, returns earned on regulatory assets are reflected in the Consolidated Statement of Operations within Interest Income . Regulatory liabilities generally represent obligations to refund customers. Management continually assesses whether regulatory assets are probable of future recovery and regulatory liabilities are probable of future payment by considering factors such as applicable regulatory changes, recent rate orders applicable to other regulated entities, and the status of any pending or potential deregulation legislation. If future recovery of costs previously deferred ceases to be probable, the related regulatory assets are written off and recognized in income from continuing operations.
PENSION AND OTHER POSTRETIREMENT PLANS	PENSION AND OTHER POSTRETIREMENT PLANS — The Company recognizes in its Consolidated Balance Sheets an asset or liability reflecting the funded status of pension and other postretirement plans with current-year changes in actuarial gains or losses recognized in AOCL, except for those plans at certain of the Company's regulated utilities that can recover portions of their pension and postretirement obligations through future rates. All plan assets are recorded at fair value. AES follows the measurement date provisions of the accounting guidance, which require a year-end measurement date of plan assets and obligations for all defined benefit plans.
INCOME TAXES	INCOME TAXES — Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of the existing assets and liabilities, and their respective income tax basis. The Company establishes a valuation allowance when it is more likely than not that all or a portion of a deferred tax asset will not be realized. The Company's tax positions are evaluated under a more likely than not recognition threshold and measurement analysis before they are recognized for financial statement reporting. Uncertain tax positions have been classified as noncurrent income tax liabilities unless expected to be paid within one year. The Company's policy for interest and penalties related to income tax exposures is to recognize interest and penalties as a component of the provision for income taxes in the Consolidated Statements of Operations.
ASSET RETIREMENT OBLIGATIONS	ASSET RETIREMENT OBLIGATIONS — The Company records the fair value of a liability for a legal obligation to retire an asset in the period in which the obligation is incurred. When a new liability is recognized, the Company capitalizes the costs of the liability by increasing the carrying amount of the related long-lived asset. The liability is accreted to its present value each period and the capitalized cost is depreciated over the useful life of the related asset. Upon settlement of the obligation, the Company eliminates the liability and, based on the actual cost to retire, may incur a gain or loss.
NONCONTROLLING INTERESTS	NONCONTROLLING INTERESTS — Noncontrolling interests are classified as a separate component of equity in the Consolidated Balance Sheets and Consolidated Statements of Changes in Equity. Additionally, net income and comprehensive income attributable to noncontrolling interests are reflected separately from consolidated net income and comprehensive income on the Consolidated Statements of Operations and Consolidated Statements of Changes in Equity. Any change in ownership of a subsidiary while the controlling financial interest is retained is accounted for as an equity transaction between the controlling and noncontrolling interests (unless the transaction qualified as a sale of in-substance real estate). Losses continue to be attributed to the noncontrolling interests, even when the noncontrolling interests' basis has been reduced to zero. Equity securities with redemption features that are not solely within the control of the issuer are classified outside of permanent equity. Generally, initial measurement will be at fair value. Subsequent measurement and classification vary depending on whether the instrument is probable of becoming redeemable. When the equity instrument is not probable of becoming redeemable, subsequent allocation of income and dividends is classified in permanent equity. For those securities where it is probable that the instrument will become redeemable or that are currently redeemable, AES recognizes changes in the fair value at each accounting period against retained earnings or additional paid-in-capital in the absence of retained earnings, subject to the floor of the initial fair value. Further, the allocation of income and dividends, as well as the adjustment to fair value, is classified outside permanent equity. Instruments that are mandatorily redeemable are classified as a liability.
FOREIGN CURRENCY TRANSLATION	FOREIGN CURRENCY TRANSLATION — A business's functional currency is the currency of the primary economic environment in which the business operates and is generally the currency in which the business generates and expends cash. Subsidiaries and affiliates whose functional currency is a currency other than the U.S. dollar translate their assets and liabilities into U.S. dollars at the current exchange rates in effect at the end of the fiscal period. Adjustments arising from the translation of the balance sheet of such subsidiaries are included in AOCL. The revenue and expense accounts of such subsidiaries and affiliates are translated into U.S. dollars at the average exchange rates for the period. Gains and losses on intercompany foreign currency transactions that are long-term in nature and which the Company does not intend to settle in the foreseeable future, are also recognized in AOCL. Gains and losses that arise from exchange rate fluctuations on transactions denominated in a currency
REVENUE RECOGNITION	REVENUE RECOGNITION — Revenue is earned from the sale of electricity from our utilities and the production and sale of electricity and capacity from our generation facilities. Revenue is recognized upon the transfer of control of promised goods or services to customers in an amount that reflects the consideration to which we expect to be entitled in exchange for those goods or services. Revenue is recorded net of any taxes assessed on and collected from customers, which are remitted to the governmental authorities. Utilities — Our utilities sell electricity directly to end-users, such as homes and businesses, and bill customers directly. The majority of our utility contracts have a single performance obligation, as the promises to transfer energy, capacity, and other distribution and/or transmission services are not distinct. Additionally, as the performance obligation is satisfied over time as energy is delivered, and the same method is used to measure progress, the performance obligation meets the criteria to be considered a series. Utility revenue is classified as regulated on the Consolidated Statements of Operations. In exchange for the right to sell or distribute electricity in a service territory, our utility businesses are subject to government regulation. This regulation sets the framework for the prices (“tariffs”) that our utilities are allowed to charge customers for electricity. Since tariffs are determined by the regulator, the price that our utilities have the right to bill corresponds directly with the value to the customer of the utility's performance completed in each period. The Company also has some month-to-month contracts. Revenue under these contracts is recognized using an output method measured by the MWh delivered each month, which best depicts the transfer of goods or services to the customer, at the approved tariff. The Company has businesses where it sells and purchases power to and from ISOs and RTOs. Our utility businesses generally purchase power to satisfy the demand of customers that is not contracted through separate PPAs. In these instances, the Company accounts for these transactions on a net hourly basis because the transactions are settled on a net hourly basis. In limited situations, a utility customer may choose to receive generation services from a third-party provider, in which case the Company may serve as a billing agent for the provider and recognize revenue on a net basis. Generation — Most of our generation fleet sells electricity under contracts to customers such as utilities, industrial users, and other intermediaries. Our generation contracts, based on specific facts and circumstances, can have one or more performance obligations as the promise to transfer energy, capacity, and other services may or may not be distinct depending on the nature of the market and terms of the contract. As the performance obligations are generally satisfied over time and use the same method to measure progress, the performance obligations meet the criteria to be considered a series. In measuring progress toward satisfaction of a performance obligation, the Company applies the "right to invoice" practical expedient when available, and recognizes revenue in the amount to which the Company has a right to consideration from a customer that corresponds directly with the value of the performance completed to date. Revenue from generation businesses is classified as non-regulated on the Consolidated Statements of Operations. For contracts determined to have multiple performance obligations, we allocate revenue to each performance obligation based on its relative standalone selling price using a market or expected cost plus margin approach. Additionally, the Company allocates variable consideration to one or more, but not all, distinct goods or services that form part of a single performance obligation when (1) the variable consideration relates specifically to the efforts to transfer the distinct good or service and (2) the variable consideration depicts the amount to which the Company expects to be entitled in exchange for transferring the promised good or service to the customer. Revenue from generation contracts is recognized using an output method, as energy and capacity delivered best depicts the transfer of goods or services to the customer. Performance obligations including energy or ancillary services (such as operations and maintenance and dispatch services) are generally measured by the MWh delivered. Capacity, which is a stand-ready obligation to deliver energy when required by the customer, is measured using MWs. In certain contracts, if plant availability exceeds a contractual target, the Company may receive a performance bonus payment, or if the plant availability falls below a guaranteed minimum target, we may incur a non-availability penalty. Such bonuses or penalties represent a form of variable consideration and are estimated and recognized when it is probable that there will not be a significant reversal. In assessing whether variable quantities are considered variable consideration or an option to acquire additional goods and services, the Company evaluates the nature of the promise and the legally enforceable rights in the contract. In some contracts, such as requirement contracts, the legally enforceable rights merely give the customer a right to purchase additional goods and services which are distinct. In these contracts, the customer's action results in a new obligation, and the variable quantities are considered an option. When energy or capacity is sold or purchased in the spot market or to ISOs, the Company assesses the facts and circumstances to determine gross versus net presentation of spot revenues and purchases. Generally, the nature of the performance obligation is to sell surplus energy or capacity above contractual commitments, or to purchase energy or capacity to satisfy deficits. Generally, on an hourly basis, a generator is either a net seller or a net buyer in terms of the amount of energy or capacity transacted with the ISO. In these situations, the Company recognizes revenue for the hours where the generator is a net seller and cost of sales for the hours where the generator is a net buyer. Certain generation contracts contain operating leases where capacity payments are generally considered lease elements. In such cases, the allocation between the lease and non-lease elements is made at the inception of the lease following the guidance in ASC 842. The transaction price allocated to a construction performance obligation is recognized as revenue over time as construction activity occurs, with revenue being fully recognized upon completion of construction. These contracts may include a difference in timing between revenue recognition and the collection of cash receipts, which may be collected over the term of the entire arrangement. The timing difference could result in a significant financing component for the construction performance obligation if determined to be a material component of the transaction price. The Company accounts for a significant financing component under the effective interest rate method, recognizing a long-term receivable for the expected future payments related to the construction performance obligation in the Loan Receivable line item on the Consolidated Balance Sheets. As payments are collected from the customer over the term of the contract, consideration related to the construction performance obligation is bifurcated between the principal repayment of the long-term receivable and the related interest income, recognized in the Consolidated Statements of Operations. Contract Balances — The timing of revenue recognition, billings, and cash collections results in accounts receivable and contract liabilities. Accounts receivable represent unconditional rights to consideration and consist of both billed amounts and unbilled amounts typically resulting from sales under long-term contracts when revenue recognized exceeds the amount billed to the customer. We bill both generation and utilities customers on a contractually agreed-upon schedule, typically at periodic intervals (e.g., monthly). The calculation of revenue earned but not yet billed is based on the number of days not billed in the month, the estimated amount of energy delivered during those days and the estimated average price per customer class for that month. Our contract liabilities consist of deferred revenue which is classified as current or noncurrent based on the timing of when we expect to recognize revenue. The current portion of our contract liabilities is reported in Accrued and other liabilities and the noncurrent portion is reported in Other noncurrent liabilities on the Consolidated Balance Sheets. Remaining Performance Obligations — The transaction price allocated to remaining performance obligations represents future consideration for unsatisfied (or partially unsatisfied) performance obligations at the end of the reporting period. The Company has elected to apply the optional disclosure exemptions under ASC 606. Therefore, the amount disclosed in Note 20 — Revenue excludes contracts with an original length of one year or less, contracts for which we recognize revenue based on the amount we have the right to invoice for services performed, and variable consideration allocated entirely to a wholly unsatisfied performance obligation when the consideration relates specifically to our efforts to satisfy the performance obligation and depicts the amount to which we expect to be entitled. As such, consideration for energy is excluded from the amount disclosed as the variable consideration relates to the amount of energy delivered and reflects the value the Company expects to receive for the energy transferred. Estimates of revenue expected to be recognized in future periods also exclude unexercised customer options to purchase additional goods or services that do not represent material rights to the customer.
Lessee, Leases [Policy Text Block]	LEASES — The Company has operating and finance leases for energy production facilities, land, office space, transmission lines, vehicles and other operating equipment in which the Company is the lessee. Operating leases with an initial term of 12 months or less are not recorded on the balance sheet, but are expensed on a straight-line basis over the lease term. The Company’s leases do not contain any material residual value guarantees, restrictive covenants or subleases. Right-of-use assets represent our right to use an underlying asset for the lease term while lease liabilities represent our obligation to make lease payments arising from the lease. Right-of-use assets and lease liabilities are recognized on commencement of the lease based on the present value of lease payments over the lease term. Generally, the rate implicit in the lease is not readily determinable; as such, we use the subsidiaries’ incremental borrowing rate based on the information available at commencement date in determining the present value of lease payments. The Company determines discount rates based on its existing credit rates of its unsecured borrowings, which are then adjusted for the appropriate lease term and currency. The right-of-use asset also includes any lease payments made and excludes lease incentives that are paid or payable to the lessee at commencement. The lease term includes the option to extend or terminate the lease if it is reasonably certain that the option will be exercised.
Lessor, Leases [Policy Text Block]	The Company has operating leases for certain generation contracts that contain provisions to provide capacity to a customer, which is a stand-ready obligation to deliver energy when required by the customer in which the Company is the lessor. Capacity payments are generally considered lease elements as they cover the majority of available output from a facility. The allocation of contract payments between the lease and non-lease elements is made at the inception of the lease. Lease payments from such contracts are recognized as lease revenue on a straight-line basis over the lease term, whereas variable lease payments are recognized when earned. The Company has sales-type leases for battery energy storage systems ("BESS") in which the Company is the lessor. These arrangements allow customers the ability to determine when to charge and discharge the BESS, representing the transfer of control and constitutes the arrangement as a sales-type lease. Upon commencement of the lease, the book value of the leased asset is removed from the balance sheet and a net investment in sales-type lease is recognized based on the present value of fixed payments under the contract and the residual value of the underlying asset.
SHARE-BASED COMPENSATION	SHARE-BASED COMPENSATION — The Company grants share-based compensation in the form of stock options, restricted stock units, performance stock units, and performance cash units. The expense is based on the grant-date fair value of the equity or liability instrument issued and is recognized on a straight-line basis over the requisite service period, net of estimated forfeitures. The Company uses a Black-Scholes option pricing model to estimate the fair value of stock options granted to its employees.
GENERAL AND ADMINISTRATIVE EXPENSES	GENERAL AND ADMINISTRATIVE EXPENSES — General and administrative expenses include corporate and other expenses related to corporate staff functions and initiatives, primarily executive management, finance, legal, human resources and information systems, which are not directly allocable to our business segments. Additionally, all costs associated with corporate business development efforts are classified as general and administrative expenses.
DERIVATIVES AND HEDGING ACTIVITIES	DERIVATIVES AND HEDGING ACTIVITIES — Under the accounting standards for derivatives and hedging, the Company recognizes all contracts that meet the definition of a derivative, except those designated as normal purchase or normal sale at inception, as either assets or liabilities in the Consolidated Balance Sheets and measures those instruments at fair value. See Note 5 — Fair Value and Fair value in this section for additional discussion regarding the determination of fair value. PPAs and fuel supply agreements are evaluated to assess if they contain either a derivative or an embedded derivative requiring separate valuation and accounting. Generally, these agreements do not meet the definition of a derivative, often due to the inability to be net settled. On a quarterly basis, we evaluate the markets for commodities to be delivered under these agreements to determine if facts and circumstances have changed such that the agreements could be net settled and meet the definition of a derivative. The Company typically designates its derivative instruments as cash flow hedges if they meet the criteria specified in ASC 815, Derivatives and Hedging . The Company enters into interest rate swap agreements in order to hedge the variability of expected future cash interest payments. Foreign currency contracts are used to reduce risks arising from the change in fair value of certain foreign currency denominated assets and liabilities. The objective of these practices is to minimize the impact of foreign currency fluctuations on operating results. The Company also enters into commodity contracts to economically hedge price variability inherent in electricity sales arrangements. The objectives of the commodity contracts are to minimize the impact of variability in spot electricity prices and stabilize estimated revenue streams. The Company does not use derivative instruments for speculative purposes. For our hedges, changes in fair value are deferred in AOCL and are recognized into earnings as the hedged transactions affect earnings. If a derivative is no longer highly effective, hedge accounting will be discontinued prospectively. For cash flow hedges of forecasted transactions, AES estimates the future cash flows of the forecasted transactions and evaluates the probability of the occurrence and timing of such transactions. Changes in the fair value of derivatives not designated and qualifying as cash flow hedges are immediately recognized in earnings. Regardless of when gains or losses on derivatives are recognized in earnings, they are generally classified as interest expense for interest rate and cross-currency derivatives, foreign currency transaction gains or losses for foreign currency derivatives, and non-regulated revenue or non-regulated cost of sales for commodity and other derivatives. Cash flows arising from derivatives are included in the Consolidated Statements of Cash Flows as an operating activity given the nature of the underlying risk being economically hedged and the lack of significant financing elements, except that cash flows on designated and qualifying hedges of variable-rate interest during construction are classified as an investing activity. The Company has elected not to offset net derivative positions in the financial statements.
DERIVATIVES OFFSETTING FAIR VALUE AMOUNTS	The Company has elected not to offset net derivative positions in the financial statements.
NEW ACCOUNTING PRONOUNCEMENTS ADOPTED	NEW ACCOUNTING PRONOUNCEMENTS — The following table provides a brief description of recent accounting pronouncements that had an impact on the Company’s consolidated financial statements. Accounting pronouncements not listed below were assessed and determined to be either not applicable or did not have a material impact on the Company’s consolidated financial statements. New Accounting Standards Adopted ASU Number and Name Description Date of Adoption Effect on the financial statements upon adoption 2014-09, 2015-14, 2016-08, 2016-10, 2016-12, 2016-20, 2017-10, 2017-13, Revenue from Contracts with Customers (Topic 606) See discussion of the ASU below. January 1, 2018 See impact upon adoption of the standard below. 2018-02, Income Statement — Reporting Comprehensive Income (Topic 220), Reclassification of Certain Tax Effects from AOCI This amendment allows a reclassification of the stranded tax effects resulting from the implementation of the Tax Cuts and Jobs Act from AOCI to retained earnings at the election of the filer. Because this amendment only relates to the reclassification of the income tax effects of the Tax Cuts and Jobs Act, the underlying guidance that requires that the effect of a change in tax laws or rates be included in income from continuing operations is not affected. January 1, 2019 The Company has not elected to reclassify any amounts to retained earnings. The Company’s accounting policy for releasing the income tax effects from AOCI occurs on a portfolio basis. 2017-12, Derivatives and Hedging (Topic 815): Targeted improvements to Accounting for Hedging Activities The standard updates the hedge accounting model to expand the ability to hedge nonfinancial and financial risk components, reduce complexity, and ease certain documentation and assessment requirements. When facts and circumstances are the same as at the previous quantitative test, a subsequent quantitative effectiveness test is not required. The standard also eliminates the requirement to separately measure and report hedge ineffectiveness. For cash flow hedges, this means that the entire change in the fair value of a hedging instrument will be recorded in other comprehensive income and amounts deferred will be reclassified to earnings in the same income statement line as the hedged item. Transition method: modified retrospective with the cumulative effect adjustment recorded to the opening balance of retained earnings as of the initial application date. Prospective for presentation and disclosures. January 1, 2019 The adoption of this standard resulted in a $4 million decrease to accumulated deficit. 2014-09, 2015-14, 2016-08, 2016-10, 2016-12, 2016-20, 2017-10, 2017-13, Revenue from Contracts with Customers (Topic 606) ASC 606 was adopted by sPower on January 1, 2019. sPower was not required to adopt ASC 606 using the public adoption date, as sPower is an equity method investee that meets the definition of a public business entity only by virtue of the inclusion of its summarized financial information in the Company’s SEC filings. Under the previous revenue standard, the payment received by sPower for the transfer of Incentive Tax Credits related to projects was deferred and recognized in revenue over time. Under ASC 606, this payment is recognized at a point in time. January 1, 2019 The adoption of this standard resulted in a $6 million decrease to accumulated deficit attributable to the AES Corporation stockholders’ equity. 2016-02, 2018-01, 2018-10, 2018-11, 2018-20, 2019-01, Leases (Topic 842) See discussion of the ASU below. January 1, 2019 See impact upon adoption of the standard below. ASC 842 — Leases On January 1, 2019, the Company adopted ASC 842 Leases and its subsequent corresponding updates (“ASC 842”). Under this standard, lessees are required to recognize assets and liabilities for most leases on the balance sheet, and recognize expenses in a manner similar to the prior accounting method. For lessors, the guidance modifies the lease classification criteria and the accounting for sales-type and direct financing leases. The guidance eliminates previous real estate-specific provisions. Under ASC 842, fewer of our contracts contain a lease. However, due to the elimination of the real estate-specific guidance and changes to certain lessor classification criteria, more leases qualify as sales-type leases and direct financing leases. Under these two models, a lessor derecognizes the asset and recognizes a lease receivable. According to ASC 842, the net investment in the lease includes the fair value of residual interest in the asset after the contract period as well as the present value of the fixed lease payments, but does not include any variable payments under the lease. Therefore, the net investment in the lease could be significantly different than the carrying amount of the underlying asset at lease commencement. In such circumstances, the difference between the initially recognized net investment in the lease and the carrying amount of the underlying asset is recognized as a gain/loss at lease commencement. During the course of adopting ASC 842, the Company applied various practical expedients including: • The package of practical expedients (applied to all leases) that allowed lessees and lessors not to reassess: a. whether any expired or existing contracts are or contain leases, b. lease classification for any expired or existing leases, and c. whether initial direct costs for any expired or existing leases qualify for capitalization under ASC 842. • The transition practical expedient related to land easements, allowing us to carry forward our accounting treatment for land easements on existing agreements, and • The transition practical expedient for lessees that allowed businesses to not separate lease and non-lease components. The Company applied the practical expedient to all classes of underlying assets when valuing right-of-use assets and lease liabilities. Contracts where the Company is the lessor were separated between the lease and non-lease components. The Company applied the modified retrospective method of adoption and elected to continue to apply the guidance in ASC 840 Leases to the comparative periods presented in the year of adoption. Under this transition method, the Company applied the transition provisions starting at the date of adoption. The cumulative effect of the adoption of ASC 842 on our January 1, 2019 Consolidated Balance Sheet was as follows (in millions): Consolidated Balance Sheet Balance at December 31, 2018 Adjustments Due to ASC 842 Balance at January 1, 2019 Assets Other noncurrent assets $ 1,514 $ 253 $ 1,767 Liabilities Accrued and other liabilities 962 27 989 Other noncurrent liabilities 2,723 226 2,949 The primary impact of adoption was due to the recognition of a right-of-use-asset and lease liability for an operating land lease in Panama associated with the Colon LNG power plant and regasification terminal. ASC 606 — Revenue from Contracts with Customers On January 1, 2018, the Company adopted ASU 2014-09, "Revenue from Contracts with Customers," and its subsequent corresponding updates ("ASC 606"). Under this standard, an entity shall recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The Company applied the modified retrospective method of adoption to the contracts that were not completed as of January 1, 2018. Results for reporting periods beginning January 1, 2018 are presented under ASC 606, while prior period amounts were not adjusted and continue to be reported in accordance with the previous revenue recognition standard. For contracts that were modified before January 1, 2018, the Company reflected the aggregate effect of all modifications when identifying the satisfied and unsatisfied performance obligations, determining the transaction price and allocating the transaction price. The cumulative effect to our January 1, 2018 Consolidated Balance Sheet resulting from the adoption of ASC 606 was as follows (in millions): Consolidated Balance Sheet Balance at December 31, 2017 Adjustments Due to ASC 606 Balance at January 1, 2018 Assets Other current assets $ 630 $ 61 $ 691 Deferred income taxes 130 (24 ) 106 Service concession assets, net 1,360 (1,360 ) — Loan receivable — 1,490 1,490 Equity Accumulated deficit (2,276 ) 67 (2,209 ) Accumulated other comprehensive loss (1,876 ) 19 (1,857 ) Noncontrolling interest 2,380 81 2,461 The Mong Duong II power plant in Vietnam is the primary driver of changes in revenue recognition under the new standard. This plant is operated under a build, operate, and transfer contract and will be transferred to the Vietnamese government after the completion of a 25-year PPA. Under the previous revenue recognition standard, construction costs were deferred to a service concession asset, which was expensed in proportion to revenue recognized for the construction element over the term of the PPA. Under ASC 606, construction revenue and associated costs are recognized as construction activity occurs. As construction of the plant was substantially completed in 2015, revenues and costs associated with the construction were recognized through retained earnings, and the service concession asset was derecognized. A loan receivable was recognized for the future expected payments for the construction performance obligation. As the payments for the construction performance obligation occur over a 25-year term, a significant financing element was determined to exist which is accounted for under the effective interest rate method. The other performance obligation to operate and maintain the facility is measured based on the capacity made available. The impact to our Consolidated Balance Sheet as of December 31, 2018 resulting from the adoption of ASC 606 as compared to the previous revenue recognition standard was as follows (in millions): December 31, 2018 Consolidated Balance Sheet As Reported Balances Without Adoption of ASC 606 Adoption Impact Assets Other current assets $ 807 $ 741 $ 66 Deferred income taxes 97 122 (25 ) Service concession assets, net — 1,261 (1,261 ) Loan receivable 1,423 — 1,423 TOTAL ASSETS 32,521 32,318 203 Equity Accumulated deficit (1,005 ) (1,112 ) 107 Accumulated other comprehensive loss (2,071 ) (2,088 ) 17 Noncontrolling interest 2,396 2,317 79 TOTAL LIABILITIES AND EQUITY 32,521 32,318 203 The impact to our Consolidated Statement of Operations for the year ended December 31, 2018 resulting from the adoption of ASC 606 as compared to the previous revenue recognition standard was as follows (in millions): Year Ended December 31, 2018 Consolidated Statement of Operations As Reported Balances Without Adoption of ASC 606 Adoption Impact Total revenue $ 10,736 $ 10,800 $ (64 ) Total cost of sales (8,163 ) (8,207 ) 44 Operating margin 2,573 2,593 (20 ) Interest income 310 252 58 Other Income 72 70 2 Income from continuing operations before taxes and equity in earnings of affiliates 2,018 1,978 40 INCOME FROM CONTINUING OPERATIONS 1,349 1,309 40 NET INCOME 1,565 1,525 40 NET INCOME ATTRIBUTABLE TO THE AES CORPORATION 1,203 1,163 40 New Accounting Pronouncements Issued But Not Yet Effective — The following table provides a brief description of recent accounting pronouncements that could have a material impact on the Company’s consolidated financial statements once adopted. Accounting pronouncements not listed below were assessed and determined to be either not applicable or are expected to have no material impact on the Company’s consolidated financial statements. New Accounting Standards Issued But Not Yet Effective ASU Number and Name Description Date of Adoption Effect on the financial statements upon adoption 2019-12, Income Taxes (Topic 740): Simplifying the Accounting For Income Taxes The standard removes certain exceptions for recognizing deferred taxes for investments, performing intraperiod allocation and calculating income taxes in interim periods. It also adds guidance to reduce complexity in certain areas, including recognizing deferred taxes for tax goodwill and allocating taxes to members of a consolidated group. Transition Method: various January 1, 2021. Early adoption is permitted. The Company is currently evaluating the impact of adopting the standard on its consolidated financial statements. 2016-13, 2018-19, 2019-04, 2019-05, 2019-10, 2019-11, Financial Instruments — Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments See discussion of the ASU below. January 1, 2020. Early adoption is permitted only as of January 1, 2019. The Company will adopt the standard on January 1, 2020; see below for the evaluation of the impact of the adoption on the consolidated financial statements.
ACCOUNTING PRONOUNCEMENTS ISSUED BUT NOT YET EFFECTIVE	New Accounting Pronouncements Issued But Not Yet Effective — The following table provides a brief description of recent accounting pronouncements that could have a material impact on the Company’s consolidated financial statements once adopted. Accounting pronouncements not listed below were assessed and determined to be either not applicable or are expected to have no material impact on the Company’s consolidated financial statements. New Accounting Standards Issued But Not Yet Effective ASU Number and Name Description Date of Adoption Effect on the financial statements upon adoption 2019-12, Income Taxes (Topic 740): Simplifying the Accounting For Income Taxes The standard removes certain exceptions for recognizing deferred taxes for investments, performing intraperiod allocation and calculating income taxes in interim periods. It also adds guidance to reduce complexity in certain areas, including recognizing deferred taxes for tax goodwill and allocating taxes to members of a consolidated group. Transition Method: various January 1, 2021. Early adoption is permitted. The Company is currently evaluating the impact of adopting the standard on its consolidated financial statements. 2016-13, 2018-19, 2019-04, 2019-05, 2019-10, 2019-11, Financial Instruments — Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments See discussion of the ASU below. January 1, 2020. Early adoption is permitted only as of January 1, 2019. The Company will adopt the standard on January 1, 2020; see below for the evaluation of the impact of the adoption on the consolidated financial statements. ASU 2016-13 and its subsequent corresponding updates will update the impairment model for financial assets measured at amortized cost, known as the Current Expected Credit Loss (“CECL”) model. For trade and other receivables, held-to-maturity debt securities, loans and other instruments, entities will be required to use a new forward-looking "expected loss" model that generally will result in the earlier recognition of allowance for losses. For available-for-sale debt securities with unrealized losses, there will be no change to the measurement of credit losses, except that unrealized losses due to credit-related factors will be recognized as an allowance on the balance sheet with a corresponding adjustment to earnings in the income statement. There are various transition methods available upon adoption. The Company is currently evaluating the impact of adopting the standard on its consolidated financial statements; however, it is expected that the new current expected credit loss model will primarily impact the calculation of the Company’s expected credit losses on $1.5 billion in gross trade accounts receivable, the $1.4 billion loan receivable at Mong Duong, $64 million in financing receivables in Argentina, and $33 million in financing receivables in Chile. The Company does not expect a material impact to result from the application of CECL on our trade accounts receivable; however, we are continuing to evaluate the potential impacts on our Mong Duong loan receivable and our financing receivables. In particular, the Company is finalizing our determination of the reasonable and supportable forecast period and the appropriate mix of relevant internal and external credit quality information for these types of financial assets, where we have no historical loss experience and limited external market data available. Estimated credit losses, if material, will be presented on the face of the balance sheet as an allowance that reduces the amortized cost basis of affected financial assets. The standard will also impact the presentation of expected credit-related losses (if any) for the Company’s $326 million of available-for-sale debt securities, which will be presented parenthetically as an allowance on the consolidated balance sheet.
SEGMENTS AND GEOGRAPHIC INFORMATION	The segment reporting structure uses the Company's management reporting structure as its foundation to reflect how the Company manages the businesses internally and is mainly organized by geographic regions which provides a socio-political-economic understanding of our business. The management reporting structure is organized by four SBUs led by our President and Chief Executive Officer: US and Utilities, South America, MCAC, and Eurasia SBUs. Using the accounting guidance on segment reporting, the Company determined that its four operating segments are aligned with its four reportable segments corresponding to its SBUs. Corporate and Other — Included in "Corporate and Other" are the results of the AES self-insurance company and certain equity affiliates, corporate overhead costs which are not directly associated with the operations of our four reportable segments, and certain intercompany charges such as self-insurance premiums which are fully eliminated in consolidation. The Company uses Adjusted PTC as its primary segment performance measure. Adjusted PTC, a non-GAAP measure, is defined by the Company as pre-tax income from continuing operations attributable to The AES Corporation excluding gains or losses of the consolidated entity due to (a) unrealized gains or losses related to derivative transactions and equity securities; (b) unrealized foreign currency gains or losses; (c) gains, losses, benefits and costs associated with dispositions and acquisitions of business interests, including early plant closures, and gains and losses recognized at commencement of sales-type leases; (d) losses due to impairments; (e) gains, losses and costs due to the early retirement of debt; and (f) costs directly associated with a major restructuring program, including, but not limited to, workforce reduction efforts, relocations and office consolidation . Adjusted PTC also includes net equity in earnings of affiliates on an after-tax basis adjusted for the same gains or losses excluded from consolidated entities. The Company has concluded Adjusted PTC better reflects the underlying business performance of the Company and is the most relevant measure considered in the Company's internal evaluation of the financial performance of its segments. Additionally, given its large number of businesses and complexity, the Company concluded that Adjusted PTC is a more transparent measure that better assists investors in determining which businesses have the greatest impact on the Company's results. Revenue and Adjusted PTC are presented before inter-segment eliminations, which includes the effect of intercompany transactions with other segments except for interest, charges for certain management fees, and the write-off of intercompany balances, as applicable. All intra-segment activity has been eliminated within the segment. Inter-segment activity has been eliminated within the total consolidated results.
Earnings Per Share, Policy [Policy Text Block]	Basic and diluted earnings per share are based on the weighted-average number of shares of common stock and potential common stock outstanding during the period. Potential common stock, for purposes of determining diluted earnings per share, includes the effects of dilutive RSUs and stock options. The effect of such potential common stock is computed using the treasury stock method.

Contingencies Contingencies (Po

Contingencies Contingencies (Policies)	12 Months Ended
	Dec. 31, 2019
Loss Contingencies [Line Items]
Commitments and Contingencies, Policy [Policy Text Block]	The Company is involved in certain claims, suits and legal proceedings in the normal course of business. The Company accrues for litigation and claims when it is probable that a liability has been incurred and the amount of loss can be reasonably estimated. The Company has recognized aggregate liabilities for all claims of approximately $55 million and $53 million as of December 31, 2019 and 2018 , respectively. These amounts are reported on the Consolidated Balance Sheets within Accrued and other liabilities and Other noncurrent liabilities . A significant portion of these accrued liabilities relate to regulatory matters and commercial disputes in international jurisdictions. There can be no assurance that these accrued liabilities will be adequate to cover all existing and future claims or that we will have the liquidity to pay such claims as they arise.

Leases (Policies)

Leases (Policies)	12 Months Ended
	Dec. 31, 2019
Leases [Abstract]
Early Termination [Policy Text Block]	The option to extend or terminate a lease is based on customary early termination provisions in the contract, such as payment defaults, bankruptcy, and lack of performance on energy delivery.

Segments and Geographic Informa

Segments and Geographic Information Segments and Geographic Information (Policies)	12 Months Ended
	Dec. 31, 2019
Segment Reporting [Abstract]
Segment Reporting, Policy [Policy Text Block]	The segment reporting structure uses the Company's management reporting structure as its foundation to reflect how the Company manages the businesses internally and is mainly organized by geographic regions which provides a socio-political-economic understanding of our business. The management reporting structure is organized by four SBUs led by our President and Chief Executive Officer: US and Utilities, South America, MCAC, and Eurasia SBUs. Using the accounting guidance on segment reporting, the Company determined that its four operating segments are aligned with its four reportable segments corresponding to its SBUs. Corporate and Other — Included in "Corporate and Other" are the results of the AES self-insurance company and certain equity affiliates, corporate overhead costs which are not directly associated with the operations of our four reportable segments, and certain intercompany charges such as self-insurance premiums which are fully eliminated in consolidation. The Company uses Adjusted PTC as its primary segment performance measure. Adjusted PTC, a non-GAAP measure, is defined by the Company as pre-tax income from continuing operations attributable to The AES Corporation excluding gains or losses of the consolidated entity due to (a) unrealized gains or losses related to derivative transactions and equity securities; (b) unrealized foreign currency gains or losses; (c) gains, losses, benefits and costs associated with dispositions and acquisitions of business interests, including early plant closures, and gains and losses recognized at commencement of sales-type leases; (d) losses due to impairments; (e) gains, losses and costs due to the early retirement of debt; and (f) costs directly associated with a major restructuring program, including, but not limited to, workforce reduction efforts, relocations and office consolidation . Adjusted PTC also includes net equity in earnings of affiliates on an after-tax basis adjusted for the same gains or losses excluded from consolidated entities. The Company has concluded Adjusted PTC better reflects the underlying business performance of the Company and is the most relevant measure considered in the Company's internal evaluation of the financial performance of its segments. Additionally, given its large number of businesses and complexity, the Company concluded that Adjusted PTC is a more transparent measure that better assists investors in determining which businesses have the greatest impact on the Company's results. Revenue and Adjusted PTC are presented before inter-segment eliminations, which includes the effect of intercompany transactions with other segments except for interest, charges for certain management fees, and the write-off of intercompany balances, as applicable. All intra-segment activity has been eliminated within the segment. Inter-segment activity has been eliminated within the total consolidated results.

Income Taxes Income Taxes (Poli

Income Taxes Income Taxes (Policies)	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income Tax, Policy [Policy Text Block]	INCOME TAXES — Deferred tax assets and liabilities are recognized for the future tax consequences attributable to differences between the financial statement carrying amounts of the existing assets and liabilities, and their respective income tax basis. The Company establishes a valuation allowance when it is more likely than not that all or a portion of a deferred tax asset will not be realized. The Company's tax positions are evaluated under a more likely than not recognition threshold and measurement analysis before they are recognized for financial statement reporting. Uncertain tax positions have been classified as noncurrent income tax liabilities unless expected to be paid within one year. The Company's policy for interest and penalties related to income tax exposures is to recognize interest and penalties as a component of the provision for income taxes in the Consolidated Statements of Operations.

Earnings Per Share Earnings Per

Earnings Per Share Earnings Per Share (Policies)	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
Earnings Per Share, Policy [Policy Text Block]	Basic and diluted earnings per share are based on the weighted-average number of shares of common stock and potential common stock outstanding during the period. Potential common stock, for purposes of determining diluted earnings per share, includes the effects of dilutive RSUs and stock options. The effect of such potential common stock is computed using the treasury stock method.

General and Summary of Signif_3

General and Summary of Significant Accounting Policies Effect of Change in Estimate (Tables)	12 Months Ended
	Dec. 31, 2019
Change in Accounting Estimate [Line Items]
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block]	The following table provides a brief description of recent accounting pronouncements that had an impact on the Company’s consolidated financial statements. Accounting pronouncements not listed below were assessed and determined to be either not applicable or did not have a material impact on the Company’s consolidated financial statements. New Accounting Standards Adopted ASU Number and Name Description Date of Adoption Effect on the financial statements upon adoption 2014-09, 2015-14, 2016-08, 2016-10, 2016-12, 2016-20, 2017-10, 2017-13, Revenue from Contracts with Customers (Topic 606) See discussion of the ASU below. January 1, 2018 See impact upon adoption of the standard below. 2018-02, Income Statement — Reporting Comprehensive Income (Topic 220), Reclassification of Certain Tax Effects from AOCI This amendment allows a reclassification of the stranded tax effects resulting from the implementation of the Tax Cuts and Jobs Act from AOCI to retained earnings at the election of the filer. Because this amendment only relates to the reclassification of the income tax effects of the Tax Cuts and Jobs Act, the underlying guidance that requires that the effect of a change in tax laws or rates be included in income from continuing operations is not affected. January 1, 2019 The Company has not elected to reclassify any amounts to retained earnings. The Company’s accounting policy for releasing the income tax effects from AOCI occurs on a portfolio basis. 2017-12, Derivatives and Hedging (Topic 815): Targeted improvements to Accounting for Hedging Activities The standard updates the hedge accounting model to expand the ability to hedge nonfinancial and financial risk components, reduce complexity, and ease certain documentation and assessment requirements. When facts and circumstances are the same as at the previous quantitative test, a subsequent quantitative effectiveness test is not required. The standard also eliminates the requirement to separately measure and report hedge ineffectiveness. For cash flow hedges, this means that the entire change in the fair value of a hedging instrument will be recorded in other comprehensive income and amounts deferred will be reclassified to earnings in the same income statement line as the hedged item. Transition method: modified retrospective with the cumulative effect adjustment recorded to the opening balance of retained earnings as of the initial application date. Prospective for presentation and disclosures. January 1, 2019 The adoption of this standard resulted in a $4 million decrease to accumulated deficit. 2014-09, 2015-14, 2016-08, 2016-10, 2016-12, 2016-20, 2017-10, 2017-13, Revenue from Contracts with Customers (Topic 606) ASC 606 was adopted by sPower on January 1, 2019. sPower was not required to adopt ASC 606 using the public adoption date, as sPower is an equity method investee that meets the definition of a public business entity only by virtue of the inclusion of its summarized financial information in the Company’s SEC filings. Under the previous revenue standard, the payment received by sPower for the transfer of Incentive Tax Credits related to projects was deferred and recognized in revenue over time. Under ASC 606, this payment is recognized at a point in time. January 1, 2019 The adoption of this standard resulted in a $6 million decrease to accumulated deficit attributable to the AES Corporation stockholders’ equity. 2016-02, 2018-01, 2018-10, 2018-11, 2018-20, 2019-01, Leases (Topic 842) See discussion of the ASU below. January 1, 2019 See impact upon adoption of the standard below. ASC 842 — Leases On January 1, 2019, the Company adopted ASC 842 Leases and its subsequent corresponding updates (“ASC 842”). Under this standard, lessees are required to recognize assets and liabilities for most leases on the balance sheet, and recognize expenses in a manner similar to the prior accounting method. For lessors, the guidance modifies the lease classification criteria and the accounting for sales-type and direct financing leases. The guidance eliminates previous real estate-specific provisions. Under ASC 842, fewer of our contracts contain a lease. However, due to the elimination of the real estate-specific guidance and changes to certain lessor classification criteria, more leases qualify as sales-type leases and direct financing leases. Under these two models, a lessor derecognizes the asset and recognizes a lease receivable. According to ASC 842, the net investment in the lease includes the fair value of residual interest in the asset after the contract period as well as the present value of the fixed lease payments, but does not include any variable payments under the lease. Therefore, the net investment in the lease could be significantly different than the carrying amount of the underlying asset at lease commencement. In such circumstances, the difference between the initially recognized net investment in the lease and the carrying amount of the underlying asset is recognized as a gain/loss at lease commencement. During the course of adopting ASC 842, the Company applied various practical expedients including: • The package of practical expedients (applied to all leases) that allowed lessees and lessors not to reassess: a. whether any expired or existing contracts are or contain leases, b. lease classification for any expired or existing leases, and c. whether initial direct costs for any expired or existing leases qualify for capitalization under ASC 842. • The transition practical expedient related to land easements, allowing us to carry forward our accounting treatment for land easements on existing agreements, and • The transition practical expedient for lessees that allowed businesses to not separate lease and non-lease components. The Company applied the practical expedient to all classes of underlying assets when valuing right-of-use assets and lease liabilities. Contracts where the Company is the lessor were separated between the lease and non-lease components. The Company applied the modified retrospective method of adoption and elected to continue to apply the guidance in ASC 840 Leases to the comparative periods presented in the year of adoption. Under this transition method, the Company applied the transition provisions starting at the date of adoption. The cumulative effect of the adoption of ASC 842 on our January 1, 2019 Consolidated Balance Sheet was as follows (in millions): Consolidated Balance Sheet Balance at December 31, 2018 Adjustments Due to ASC 842 Balance at January 1, 2019 Assets Other noncurrent assets $ 1,514 $ 253 $ 1,767 Liabilities Accrued and other liabilities 962 27 989 Other noncurrent liabilities 2,723 226 2,949 The primary impact of adoption was due to the recognition of a right-of-use-asset and lease liability for an operating land lease in Panama associated with the Colon LNG power plant and regasification terminal. ASC 606 — Revenue from Contracts with Customers On January 1, 2018, the Company adopted ASU 2014-09, "Revenue from Contracts with Customers," and its subsequent corresponding updates ("ASC 606"). Under this standard, an entity shall recognize revenue to depict the transfer of promised goods or services to customers in an amount that reflects the consideration to which the entity expects to be entitled in exchange for those goods or services. The Company applied the modified retrospective method of adoption to the contracts that were not completed as of January 1, 2018. Results for reporting periods beginning January 1, 2018 are presented under ASC 606, while prior period amounts were not adjusted and continue to be reported in accordance with the previous revenue recognition standard. For contracts that were modified before January 1, 2018, the Company reflected the aggregate effect of all modifications when identifying the satisfied and unsatisfied performance obligations, determining the transaction price and allocating the transaction price. The cumulative effect to our January 1, 2018 Consolidated Balance Sheet resulting from the adoption of ASC 606 was as follows (in millions): Consolidated Balance Sheet Balance at December 31, 2017 Adjustments Due to ASC 606 Balance at January 1, 2018 Assets Other current assets $ 630 $ 61 $ 691 Deferred income taxes 130 (24 ) 106 Service concession assets, net 1,360 (1,360 ) — Loan receivable — 1,490 1,490 Equity Accumulated deficit (2,276 ) 67 (2,209 ) Accumulated other comprehensive loss (1,876 ) 19 (1,857 ) Noncontrolling interest 2,380 81 2,461 The Mong Duong II power plant in Vietnam is the primary driver of changes in revenue recognition under the new standard. This plant is operated under a build, operate, and transfer contract and will be transferred to the Vietnamese government after the completion of a 25-year PPA. Under the previous revenue recognition standard, construction costs were deferred to a service concession asset, which was expensed in proportion to revenue recognized for the construction element over the term of the PPA. Under ASC 606, construction revenue and associated costs are recognized as construction activity occurs. As construction of the plant was substantially completed in 2015, revenues and costs associated with the construction were recognized through retained earnings, and the service concession asset was derecognized. A loan receivable was recognized for the future expected payments for the construction performance obligation. As the payments for the construction performance obligation occur over a 25-year term, a significant financing element was determined to exist which is accounted for under the effective interest rate method. The other performance obligation to operate and maintain the facility is measured based on the capacity made available. The impact to our Consolidated Balance Sheet as of December 31, 2018 resulting from the adoption of ASC 606 as compared to the previous revenue recognition standard was as follows (in millions): December 31, 2018 Consolidated Balance Sheet As Reported Balances Without Adoption of ASC 606 Adoption Impact Assets Other current assets $ 807 $ 741 $ 66 Deferred income taxes 97 122 (25 ) Service concession assets, net — 1,261 (1,261 ) Loan receivable 1,423 — 1,423 TOTAL ASSETS 32,521 32,318 203 Equity Accumulated deficit (1,005 ) (1,112 ) 107 Accumulated other comprehensive loss (2,071 ) (2,088 ) 17 Noncontrolling interest 2,396 2,317 79 TOTAL LIABILITIES AND EQUITY 32,521 32,318 203 The impact to our Consolidated Statement of Operations for the year ended December 31, 2018 resulting from the adoption of ASC 606 as compared to the previous revenue recognition standard was as follows (in millions): Year Ended December 31, 2018 Consolidated Statement of Operations As Reported Balances Without Adoption of ASC 606 Adoption Impact Total revenue $ 10,736 $ 10,800 $ (64 ) Total cost of sales (8,163 ) (8,207 ) 44 Operating margin 2,573 2,593 (20 ) Interest income 310 252 58 Other Income 72 70 2 Income from continuing operations before taxes and equity in earnings of affiliates 2,018 1,978 40 INCOME FROM CONTINUING OPERATIONS 1,349 1,309 40 NET INCOME 1,565 1,525 40 NET INCOME ATTRIBUTABLE TO THE AES CORPORATION 1,203 1,163 40 New Accounting Pronouncements Issued But Not Yet Effective — The following table provides a brief description of recent accounting pronouncements that could have a material impact on the Company’s consolidated financial statements once adopted. Accounting pronouncements not listed below were assessed and determined to be either not applicable or are expected to have no material impact on the Company’s consolidated financial statements. New Accounting Standards Issued But Not Yet Effective ASU Number and Name Description Date of Adoption Effect on the financial statements upon adoption 2019-12, Income Taxes (Topic 740): Simplifying the Accounting For Income Taxes The standard removes certain exceptions for recognizing deferred taxes for investments, performing intraperiod allocation and calculating income taxes in interim periods. It also adds guidance to reduce complexity in certain areas, including recognizing deferred taxes for tax goodwill and allocating taxes to members of a consolidated group. Transition Method: various January 1, 2021. Early adoption is permitted. The Company is currently evaluating the impact of adopting the standard on its consolidated financial statements. 2016-13, 2018-19, 2019-04, 2019-05, 2019-10, 2019-11, Financial Instruments — Credit Losses (Topic 326): Measurement of Credit Losses on Financial Instruments See discussion of the ASU below. January 1, 2020. Early adoption is permitted only as of January 1, 2019. The Company will adopt the standard on January 1, 2020; see below for the evaluation of the impact of the adoption on the consolidated financial statements.
Schedule of Change in Accounting Estimate [Table Text Block]	.

Inventory (Tables)

Inventory (Tables)	12 Months Ended
	Dec. 31, 2019
Inventory Disclosure [Abstract]
Inventory Balance By Type	The following table summarizes the Company's inventory balances as of the dates indicated (in millions): December 31, 2019 2018 Fuel and other raw materials $ 230 $ 300 Spare parts and supplies 257 277 Total $ 487 $ 577

Property, Plant and Equipment (

Property, Plant and Equipment (Tables)	12 Months Ended
	Dec. 31, 2019
Property, Plant and Equipment [Abstract]
Property, Pland and Equipment with Useful Life Classification	The following table summarizes the components of the electric generation and distribution assets and other property, plant and equipment (in millions) with their estimated useful lives (in years). The amounts are stated net of all prior asset impairment losses recognized. December 31, Estimated Useful Life 2019 2018 Electric generation and distribution facilities 5-40 $ 22,869 $ 22,875 Other buildings 5-50 1,612 1,651 Furniture, fixtures and equipment 3-27 319 310 Other 5-40 583 406 Total electric generation and distribution assets and other 25,383 25,242 Accumulated depreciation (8,505 ) (8,227 ) Net electric generation and distribution assets and other $ 16,878 $ 17,015
Interest Capitalized During Development And Construction	The following table summarizes depreciation expense (including the amortization of assets recorded under finance leases in 2019 or capital leases in prior periods, and the amortization of asset retirement obligations) and interest capitalized during development and construction on qualifying assets for the periods indicated (in millions): Years Ended December 31, 2019 2018 2017 Depreciation expense $ 977 $ 960 $ 1,005 Interest capitalized during development and construction 238 199 139
Net Asset Value Of Regulated And Non-Regulated Assets And Accumulated Depreciation	The following table summarizes regulated and non-regulated generation and distribution property, plant and equipment and accumulated depreciation as of the dates indicated (in millions): December 31, 2019 2018 Regulated generation and distribution assets and other, gross $ 9,246 $ 8,959 Regulated accumulated depreciation (3,707 ) (3,504 ) Regulated generation and distribution assets and other, net 5,539 5,455 Non-regulated generation and distribution assets and other, gross 16,137 16,283 Non-regulated accumulated depreciation (4,798 ) (4,723 ) Non-regulated generation and distribution assets and other, net 11,339 11,560 Net electric generation and distribution assets and other $ 16,878 $ 17,015

Asset Retirement Obligation (Ta

Asset Retirement Obligation (Tables)	12 Months Ended
	Dec. 31, 2019
Asset Retirement Obligation Disclosure [Abstract]
Schedule of Asset Retirement Obligations [Table Text Block]	The following table presents amounts recognized related to asset retirement obligations for the periods indicated (in millions): 2019 2018 Balance at January 1 $ 415 $ 368 Additional liabilities incurred 19 19 Liabilities settled (12 ) (14 ) Accretion expense 21 18 Change in estimated cash flows 58 24 Sale of plants (71 ) — Other (2 ) — Balance at December 31 $ 428 $ 415

Fair Value (Tables)

Fair Value (Tables)	12 Months Ended
	Dec. 31, 2019
Fair Value Disclosures [Abstract]
Significant unobservable inputs, recurring	The following table summarizes the significant unobservable inputs used for the Level 3 derivative assets (liabilities) as of December 31, 2019 (in millions, except range amounts): Type of Derivative Fair Value Unobservable Input Amount or Range (Weighted Average) Interest rate $ (184 ) Subsidiaries’ credit spreads 0.8% - 4.94% (3.7%) Cross-currency (11 ) Subsidiaries’ credit spreads 2.1 % Foreign currency: Argentine peso 94 Argentine peso to USD currency exchange rate after one year 61 - 495 (250) Commodity: Other (1 ) Total $ (102 )
Derivatives Level 3 Rollforward Table	The following tables present a reconciliation of net derivative assets and liabilities measured at fair value on a recurring basis using significant unobservable inputs (Level 3) for the years ended December 31, 2019 and 2018 (presented net by type of derivative in millions). Transfers between Level 3 and Level 2 principally result from changes in the significance of unobservable inputs used to calculate the credit valuation adjustment. Year Ended December 31, 2019 Interest Rate Cross Currency Foreign Currency Commodity Total Balance at January 1 $ (140 ) $ — $ 199 $ 4 $ 63 Total realized and unrealized gains (losses): Included in earnings (1 ) — (65 ) (2 ) (68 ) Included in other comprehensive income — derivative activity (97 ) — (17 ) — (114 ) Included in regulatory (assets) liabilities — — — (5 ) (5 ) Settlements 8 — (23 ) 2 (13 ) Transfers of assets/(liabilities), net into Level 3 (2 ) (11 ) — — (13 ) Transfers of (assets)/liabilities, net out of Level 3 48 — — — 48 Balance at December 31 $ (184 ) $ (11 ) $ 94 $ (1 ) $ (102 ) Total gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets and liabilities held at the end of the period $ — $ — $ (67 ) $ (2 ) $ (69 ) Year Ended December 31, 2018 Interest Rate Cross Currency Foreign Currency Commodity Total Balance at January 1 $ (151 ) $ — $ 240 $ 4 $ 93 Total realized and unrealized gains (losses): Included in earnings 22 — (14 ) (1 ) 7 Included in other comprehensive income — derivative activity (8 ) — — — (8 ) Included in regulatory (assets) liabilities — — — 5 5 Settlements 14 — (27 ) (4 ) (17 ) Transfers of assets/(liabilities), net into Level 3 (8 ) — — — (8 ) Transfers of (assets)/liabilities, net out of Level 3 (9 ) — — — (9 ) Balance at December 31 $ (140 ) $ — $ 199 $ 4 $ 63 Total gains (losses) for the period included in earnings attributable to the change in unrealized gains (losses) relating to assets and liabilities held at the end of the period $ 29 $ — $ (41 ) $ (1 ) $ (13 )
Financial instruments not measured at fair value in the condensed consolidated balance sheets	The following table presents (in millions) the carrying amount, fair value and fair value hierarchy of the Company's financial assets and liabilities that are not measured at fair value in the Consolidated Balance Sheets as of the periods indicated, but for which fair value is disclosed: December 31, 2019 Carrying Amount Fair Value Total Level 1 Level 2 Level 3 Assets: Accounts receivable — noncurrent (1) $ 98 $ 145 $ — $ — $ 145 Liabilities: Non-recourse debt 16,712 16,579 — 15,804 775 Recourse debt 3,396 3,529 — 3,529 — December 31, 2018 Carrying Amount Fair Value Total Level 1 Level 2 Level 3 Assets: Accounts receivable — noncurrent (1) $ 100 $ 209 $ — $ — $ 209 Liabilities: Non-recourse debt 15,645 16,225 — 13,524 2,701 Recourse debt 3,655 3,621 — 3,621 — _____________________________ (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 Consolidated Balance Sheets. The fair value and carrying amount of the Argentina receivables exclude VAT of $11 million and $16 million as of December 31, 2019 and 2018 , respectively.
Significant unobservable inputs, nonrecurring	The following table summarizes the significant unobservable inputs used in the Level 3 measurement of long-lived assets held and used measured on a nonrecurring basis during the year ended December 31, 2019 (in millions, except range amounts): December 31, 2019 Fair Value Valuation Technique Unobservable Input Range (Weighted Average) Long-lived assets held and used: Hawaii $ 103 Discounted cash flow Annual revenue growth -11% to 1% (-6%) Pre-tax operating margin 5% to 35% (29%) Weighted-average cost of capital 5% to 15% Equity method investments: OPGC 212 Expected present value Annual dividend growth -27% to 41% (2%) Weighted-average cost of equity 9 % Total $ 315
Fair value hierarchy for nonrecurring measurements table	The following table summarizes our major categories of assets measured at fair value on a nonrecurring basis and their level within the fair value hierarchy (in millions): Year Ended December 31, 2019 Measurement Date Carrying Amount (1) Fair Value Pre-tax Loss Assets Level 1 Level 2 Level 3 Long-lived assets held and used: (2) Hawaii 12/31/2019 163 — — 103 60 Equity method investments: OPGC 12/31/2019 304 — — 212 92 Dispositions and held-for-sale businesses: (3) Kilroot and Ballylumford 04/12/2019 232 — 118 — 115 Year Ended December 31, 2018 Measurement Date Carrying Amount (1) Fair Value Pre-tax Loss Assets Level 1 Level 2 Level 3 Dispositions and held-for-sale businesses: (3) Shady Point 12/31/2018 211 — — 30 157 Long-lived assets held and used: (2) Nejapa 12/31/2018 $ 42 $ — $ — $ 5 $ 37 Equity method investments: Guacolda 10/01/2018 354 — — 209 144 Elsta 09/30/2018 19 — 16 — 3 _____________________________ (1) Represents the carrying values at the dates of initial measurement, before fair value adjustment. (2) See Note 22 — Asset Impairment Expense for further information. (3) Per the Company's policy, pre-tax loss is limited to the impairment of long-lived assets. Any additional loss will be recognized on completion of the sale. See Note 22 — Asset Impairment Expense and Note 25 — Held-for-Sale and Dispositions for further information.
Fair value hierarchy for recurring measurements table	The following table presents, by level within the fair value hierarchy as described in Note 1 — General and Summary of Significant Accounting Policies , the Company's financial assets and liabilities that were measured at fair value on a recurring basis as of the dates indicated (in millions). For the Company's investments in marketable debt securities, the security classes presented were determined based on the nature and risk of the security and are consistent with how the Company manages, monitors and measures its marketable securities: December 31, 2019 December 31, 2018 Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Assets DEBT SECURITIES: Available-for-sale: Unsecured debentures $ — $ — $ — $ — $ — $ 5 $ — $ 5 Certificates of deposit — 326 — 326 — 243 — 243 Total debt securities — 326 — 326 — 248 — 248 EQUITY SECURITIES: Mutual funds 22 61 — 83 19 49 — 68 Total equity securities 22 61 — 83 19 49 — 68 DERIVATIVES: Interest rate derivatives — 31 — 31 — 28 1 29 Cross-currency derivatives — — — — — 6 — 6 Foreign currency derivatives — 17 93 110 — 18 199 217 Commodity derivatives — 28 2 30 — 6 4 10 Total derivatives — assets — 76 95 171 — 58 204 262 TOTAL ASSETS $ 22 $ 463 $ 95 $ 580 $ 19 $ 355 $ 204 $ 578 Liabilities DERIVATIVES: Interest rate derivatives $ — $ 144 $ 184 $ 328 $ — $ 67 $ 141 $ 208 Cross-currency derivatives — 10 11 21 — 5 — 5 Foreign currency derivatives — 44 — 44 — 41 — 41 Commodity derivatives — 29 2 31 — 3 — 3 Total derivatives — liabilities — 227 197 424 — 116 141 257 TOTAL LIABILITIES $ — $ 227 $ 197 $ 424 $ — $ 116 $ 141 $ 257
Available-for-sale Securities [Table Text Block]	The following table presents gross proceeds from sale of AFS securities for the periods indicated (in millions): Year Ended December 31, 2019 2018 2017 Gross proceeds from sale of AFS securities (1) $ 663 $ 1,403 $ 1,398 _____________________________ (1) Proceeds in the year ended December 31, 2018 include $119 million of non-cash proceeds from non-convertible debentures at Guaimbê Solar Complex. See Note 26 —Acquisitions for further information.

Derivative Instruments and He_2

Derivative Instruments and Hedging Activities (Tables)	12 Months Ended
	Dec. 31, 2019
Derivative Instruments and Hedging Activities Disclosure [Abstract]
Interest Rate Derivatives By Type Table	The following table presents the Company's maximum notional (in millions) over the remaining contractual period by type of derivative as of December 31, 2019 , regardless of whether they are in qualifying cash flow hedging relationships, and the dates through which the maturities for each type of derivative range: Interest Rate and Foreign Currency Derivatives Maximum Notional Translated to USD Latest Maturity Interest Rate (LIBOR and EURIBOR) $ 5,014 2044 Cross-currency swaps (Chilean Unidad de Fomento and Chilean peso) 260 2029 Foreign Currency: Argentine peso 30 2026 Chilean peso 163 2022 Colombian peso 139 2022 Brazilian real 5 2020 Others, primarily with weighted average remaining maturities of a year or less 90 2022
Commodity Derivatives By Type Table	Commodity Derivatives Maximum Notional Latest Maturity Natural Gas (in MMBtu) 71 2020 Power (in MWhs) 1 2020 Coal (in Tons or Metric Tonnes) 10 2027
Derivative Assets Liabilities At Fair Value Net By Balance Sheet Classification And Type Table	The following tables present the fair value of assets and liabilities related to the Company's derivative instruments as of the periods indicated (in millions): Fair Value December 31, 2019 December 31, 2018 Assets Designated Not Designated Total Designated Not Designated Total Interest rate derivatives $ 31 $ — $ 31 $ 29 $ — $ 29 Cross-currency derivatives — — — 6 — 6 Foreign currency derivatives 31 79 110 — 217 217 Commodity derivatives — 30 30 — 10 10 Total assets $ 62 $ 109 $ 171 $ 35 $ 227 $ 262 Liabilities Interest rate derivatives $ 323 $ 5 $ 328 $ 205 $ 3 $ 208 Cross-currency derivatives 21 — 21 5 — 5 Foreign currency derivatives 22 22 44 28 13 41 Commodity derivatives 2 29 31 — 3 3 Total liabilities $ 368 $ 56 $ 424 $ 238 $ 19 $ 257 December 31, 2019 December 31, 2018 Fair Value Assets Liabilities Assets Liabilities Current $ 72 $ 126 $ 75 $ 51 Noncurrent 99 298 187 206 Total $ 171 $ 424 $ 262 $ 257 As of December 31, 2019 and 2018 , all derivative instruments subject to credit risk-related contingent features were in an asset position.
Gain Loss In Accumulated Other Comprehensive Income And Earnings On Effective Portion Of Qualifying Cash Flow Hedges Table	The following table presents the pre-tax gains (losses) recognized in AOCL and earnings related to all derivative instruments for the periods indicated (in millions): Years Ended December 31, 2019 2018 2017 Cash flow hedges Gains (losses) recognized in AOCL Interest rate derivatives $ (290 ) $ (16 ) $ (66 ) Cross-currency derivatives (26 ) (26 ) 31 Foreign currency derivatives (23 ) (52 ) (5 ) Commodity derivatives — — 18 Total $ (339 ) $ (94 ) $ (22 ) Gains (losses) reclassified from AOCL to earnings Interest rate derivatives $ (28 ) $ (52 ) $ (82 ) Cross-currency derivatives (12 ) (43 ) 34 Foreign currency derivatives (13 ) (16 ) (20 ) Commodity derivatives (1 ) (6 ) 17 Total $ (54 ) $ (117 ) $ (51 ) Loss reclassified from AOCL to earnings due to discontinuance of hedge accounting (1) $ (2 ) $ — $ (13 ) Gain (losses) recognized in earnings related to Ineffective portion of cash flow hedges $ — $ (7 ) $ 3 Not designated as hedging instruments: Foreign currency derivatives (46 ) 148 1 Commodity derivatives and other (6 ) 25 14 Total $ (52 ) $ 173 $ 15

Financing Receivables (Tables)

Financing Receivables (Tables)	12 Months Ended
	Dec. 31, 2019
Receivables [Abstract]
Financing Receivables	The following table presents financing receivables by country as of the dates indicated (in millions): December 31, 2019 2018 Argentina $ 64 $ 93 Chile 33 — Other 12 23 Total $ 109 $ 116

Investments In and Advances T_2

Investments In and Advances To Affiliates (Tables)	12 Months Ended
	Dec. 31, 2019
Equity Method Investments and Joint Ventures [Abstract]
Equity Ownership Interest And Carrying Values Of Investments Accounted For Under The Equity Method	The following table summarizes the relevant effective equity ownership interest and carrying values for the Company's investments accounted for under the equity method as of the periods indicated: December 31, 2019 2018 2019 2018 Affiliate Country Carrying Value (in millions) Ownership Interest % sPower United States $ 442 $ 515 50 % 50 % OPGC India 212 293 49 % 49 % Guacolda (1) Chile 74 209 33 % 33 % Uplight (2) United States 91 33 32 % 63 % Eólica Mesa La Paz (3) Mexico 66 8 50 % 50 % Gas Natural del Este Dominican Republic 48 — 43 % — % Barry (4) United Kingdom — — 100 % 100 % Other affiliates (5) Various 33 56 Total $ 966 $ 1,114 _____________________________ (1) The Company's ownership in Guacolda is held through AES Gener, a 67% -owned consolidated subsidiary. AES Gener owns 50% of Guacolda, resulting in an AES effective ownership in Guacolda of 33% . (2) Simple Energy merged with Tendril on July 1, 2019 to form Uplight. Prior year information reported relates to Simple Energy. (3) The Eólica Mesa La Paz project received funding throughout 2019 and began operations during December 2019. (4) Represents a VIE in which the Company holds a variable interest, but is not the primary beneficiary. (5) Includes Bosforo, Fluence, Distributed Energy equity method investments, and others.
Investments In and Advances to Affiliates Financial Information	The following tables summarize financial information of the Company's 50%-or-less-owned affiliates and majority-owned unconsolidated subsidiaries that are accounted for using the equity method (in millions): 50%-or-less Owned Affiliates Majority-Owned Unconsolidated Subsidiaries Years ended December 31, 2019 2018 2017 2019 2018 2017 Revenue $ 1,122 $ 962 $ 762 $ 49 $ 40 $ 16 Operating margin (loss) 124 135 165 (5 ) 3 5 Net income (loss) (724 ) 14 72 (7 ) (3 ) (15 ) December 31, 2019 2018 2019 2018 Current assets $ 831 $ 558 $ 166 $ 89 Noncurrent assets 7,220 5,918 982 41 Current liabilities 1,271 546 141 35 Noncurrent liabilities 3,966 3,309 1,052 122 Stockholders' equity 2,814 2,622 (45 ) (27 )

Goodwill and Other Intangible_2

Goodwill and Other Intangible Assets (Tables)	12 Months Ended
	Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract]
Schedule of Goodwill	The following table summarizes the carrying amount of goodwill by reportable segment for the years ended December 31, 2019 and 2018 (in millions): US and Utilities South America MCAC Eurasia Total Balance as of December 31, 2018 Goodwill $ 2,786 $ 868 $ 16 $ 122 $ 3,792 Accumulated impairment losses (2,611 ) — — (122 ) (2,733 ) Net balance 175 868 16 — 1,059 Balance as of December 31, 2019 Goodwill 2,786 868 16 — (1) 3,670 Accumulated impairment losses (2,611 ) — — — (1) (2,611 ) Net balance $ 175 $ 868 $ 16 $ — $ 1,059
Schedule of Finite-Lived and Indefinite-Lived Intangible Assets	The following table summarizes the balances comprising Other intangible assets in the accompanying Consolidated Balance Sheets (in millions) as of the periods indicated: December 31, 2019 December 31, 2018 Gross Balance Accumulated Amortization Net Balance Gross Balance Accumulated Amortization Net Balance Subject to Amortization Internal-use software $ 367 $ (228 ) $ 139 $ 467 $ (344 ) $ 123 Contracts 134 (29 ) 105 137 (24 ) 113 Project development rights 100 (1 ) 99 93 (1 ) 92 Contractual payment rights (1) — — — 57 (44 ) 13 Emissions allowances (2) 24 — 24 15 — 15 Other (3) 82 (49 ) 33 78 (44 ) 34 Subtotal 707 (307 ) 400 847 (457 ) 390 Indefinite-Lived Intangible Assets Land use rights 21 — 21 21 — 21 Water rights 20 — 20 20 — 20 Transmission rights 23 — 23 — — — Other 5 — 5 5 — 5 Subtotal 69 — 69 46 — 46 Total $ 776 $ (307 ) $ 469 $ 893 $ (457 ) $ 436 _____________________________ (1) Represent legal rights to receive system reliability payments from the regulator. (2) Acquired or purchased emissions allowances are finite-lived intangible assets that are expensed when utilized and included in net income for the year. (3) Includes management rights, sales concessions, renewable energy credits and incentives, and other individually insignificant intangible assets.
Schedule of Acquired Intangible Assets By Major Class	The following tables summarize other intangible assets acquired during the periods indicated (in millions): December 31, 2019 Amount Subject to Amortization/Indefinite-Lived Weighted Average Amortization Period (in years) Amortization Method Internal-use software $ 61 Subject to Amortization 5 Straight-line Contracts 2 Subject to Amortization 35 Straight-line Project development rights 8 Subject to Amortization 29 Straight-line Emissions allowances 22 Subject to Amortization Various As utilized Transmission rights 23 Indefinite-Lived N/A N/A Other 5 Various N/A N/A Total $ 121 December 31, 2018 Amount Subject to Amortization/Indefinite-Lived Weighted Average Amortization Period (in years) Amortization Method Internal-use software $ 67 Subject to Amortization 6 Straight-line Contracts 50 Subject to Amortization 24 Straight-line Project development rights 35 Subject to Amortization 23 Straight-line Emissions allowances 16 Subject to Amortization Various As utilized Other 11 Various N/A N/A Total $ 179
Schedule of Expected Amortization Expense	The following table summarizes the estimated amortization expense by intangible asset category for 2020 through 2024 : (in millions) 2020 2021 2022 2023 2024 Internal-use software $ 34 $ 31 $ 22 $ 17 $ 15 Contracts 4 4 4 4 4 Other 6 5 5 5 5 Total $ 44 $ 40 $ 31 $ 26 $ 24

Regulatory Assets and Liabili_2

Regulatory Assets and Liabilities (Tables)	12 Months Ended
	Dec. 31, 2019
Regulated Operations [Abstract]
Regulatory Assets and Liabilities	The Company has recorded regulatory assets and liabilities (in millions) that it expects to pass through to its customers in accordance with, and subject to, regulatory provisions as follows: December 31, 2019 2018 Recovery/Refund Period Regulatory assets Current regulatory assets: El Salvador energy pass through costs recovery $ 56 $ 87 Quarterly Other 57 69 1 year Total current regulatory assets 113 156 Noncurrent regulatory assets: IPL and DPL defined benefit pension obligations (1) 262 283 Various IPL deferred Midwest ISO costs 75 88 9 years IPL environmental costs 85 89 Various Other 108 87 Various Total noncurrent regulatory assets 530 547 Total regulatory assets $ 643 $ 703 Regulatory liabilities Current regulatory liabilities: Overcollection of costs to be passed back to customers $ 80 $ 83 1 year Other 1 3 Various Total current regulatory liabilities 81 86 Noncurrent regulatory liabilities: IPL and DPL accrued costs of removal and AROs 863 847 Over life of assets IPL and DPL income taxes payable to customers through rates 209 246 Various Other 18 53 Various Total noncurrent regulatory liabilities 1,090 1,146 Total regulatory liabilities $ 1,171 $ 1,232 _____________________________ (1) Past expenditures on which the Company earns a rate of return .

Debt (Tables)

Debt (Tables)	12 Months Ended
	Dec. 31, 2019
Debt Disclosure [Abstract]
Schedule of Non-recourse debt [Table Text Block]	During the year ended December 31, 2019 , the Company's subsidiaries had the following significant debt transactions: Subsidiary Transaction Period Issuances Repayments Gain (Loss) on Extinguishment of Debt Southland (1) Q1, Q2, Q3, Q4 $ 930 $ (210 ) $ (1 ) Gener Q1, Q2, Q4 1,000 (697 ) (29 ) DPL (2) Q2 825 (835 ) (43 ) Tietê Q2 561 (533 ) (3 ) Mong Duong (3) Q3 1,120 (1,081 ) (31 ) Colon Q3 610 (579 ) (28 ) Cochrane Q4 875 (833 ) (24 ) TEGTEP Q4 280 (248 ) (1 ) _____________________________ (1) Issuances relate to the June 2017 long-term non-recourse debt financing to fund the Southland re-powering construction projects, a non-recourse bridge loan in September 2019, and long-term non-recourse debt financing issued in December 2019 to settle the bridge loan.
Carrying Amount and Terms of Non-Recourse Debt	The following table summarizes the carrying amount and terms of non-recourse debt at our subsidiaries as of the periods indicated (in millions): NON-RECOURSE DEBT Weighted Average Interest Rate Maturity December 31, 2019 2018 Variable Rate: Bank loans 4.25% 2020 – 2050 $ 3,389 $ 2,600 Notes and bonds 3.99% 2020 – 2030 1,056 821 Debt to (or guaranteed by) multilateral, export credit agencies or development banks (1) 1.73% 2023 – 2033 460 3,292 Fixed Rate: Bank loans 5.19% 2020 – 2040 2,900 1,684 Notes and bonds 5.51% 2020 – 2079 8,098 7,346 Debt to (or guaranteed by) multilateral, export credit agencies or development banks (1) 6.09% 2023 – 2029 1,110 246 Other 4.20% 2061 17 24 Unamortized (discount) premium & debt issuance (costs), net (318 ) (368 ) Subtotal $ 16,712 $ 15,645 Less: Current maturities (2) (1,865 ) (1,659 ) Noncurrent maturities (2) $ 14,847 $ 13,986 _____________________________ (1) Multilateral loans include loans funded and guaranteed by bilaterals, multilaterals, development banks and other similar institutions.
Schedule For Maturity For Non-Recourse Debt	Non-recourse debt as of December 31, 2019 is scheduled to reach maturity as shown below (in millions): December 31, Annual Maturities 2020 $ 1,883 2021 1,648 2022 999 2023 1,125 2024 1,180 Thereafter 10,195 Unamortized (discount) premium & debt issuance (costs), net (318 ) Total $ 16,712
Debt In Default Table	The following table summarizes the Company's subsidiary non-recourse debt in default (in millions) as of December 31, 2019 . Due to the defaults, these amounts are included in the current portion of non-recourse debt: Primary Nature December 31, 2019 Subsidiary Default Net Assets AES Puerto Rico Covenant $ 287 $ 151 AES Ilumina (Puerto Rico) Covenant 33 19 AES Jordan Solar (1) Covenant 5 4 Total $ 325 _____________________________ (1) Classified as current held-for-sale liability on the Consolidated Balance Sheets.
Schedule of Recourse Debt Detail	The following table summarizes the carrying amount and terms of recourse debt of the Company as of the periods indicated (in millions): Interest Rate Final Maturity December 31, 2019 December 31, 2018 Senior Unsecured Note 4.00% 2021 500 500 Senior Secured Term Loan LIBOR + 1.75% 2022 18 366 Senior Unsecured Note 4.875% 2023 613 713 Senior Unsecured Note 4.50% 2023 500 500 Drawings on secured credit facility LIBOR + 1.75% 2024 180 — Senior Unsecured Note 5.50% 2024 63 63 Senior Unsecured Note 5.50% 2025 544 544 Senior Unsecured Note 6.00% 2026 500 500 Senior Unsecured Note 5.125% 2027 500 500 Unamortized (discount) premium & debt issuance (costs), net (22 ) (31 ) Subtotal $ 3,396 $ 3,655 Less: Current maturities (5 ) (5 ) Noncurrent maturities $ 3,391 $ 3,650 December 31, Interest Rate Maturity 2019 2018 Senior Unsecured Note 4.00% 2021 500 500 Senior Secured Term Loan LIBOR + 1.75% 2022 18 366 Senior Unsecured Note 4.875% 2023 613 713 Senior Unsecured Note 4.50% 2023 500 500 Drawings on secured credit facility LIBOR + 1.75% 2024 180 — Senior Unsecured Note 5.50% 2024 63 63 Senior Unsecured Note 5.50% 2025 544 544 Senior Unsecured Note 6.00% 2026 500 500 Senior Unsecured Note 5.125% 2027 500 500 Unamortized (discounts)/premiums & debt issuance (costs) (22 ) (31 ) Subtotal $ 3,396 $ 3,655 Less: Current maturities (5 ) (5 ) Total $ 3,391 $ 3,650
Schedule of Future Maturities of Recourse Debt	The following table summarizes the principal amounts due under our recourse debt for the next five years and thereafter (in millions): December 31, Net Principal Amounts Due 2020 $ 5 2021 505 2022 8 2023 1,113 2024 243 Thereafter 1,544 Unamortized (discount) premium & debt issuance (costs), net (22 ) Total recourse debt $ 3,396 2019 scheduled maturities are presented in the following table (in millions): December 31, Annual Maturities 2020 $ 5 2021 505 2022 8 2023 1,113 2024 243 Thereafter 1,544 Unamortized (discount)/premium & debt issuance (costs) (22 ) Total debt $ 3,396

Commitments (Tables)

Commitments (Tables)	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Electricity Purchase Contract Commitment	The following table shows the future minimum commitments for continuing operations under these contracts as of December 31, 2019 for 2020 through 2024 and thereafter as well as actual purchases under these contracts for the years ended December 31, 2019 , 2018 , and 2017 (in millions): Actual purchases during the year ended December 31, Electricity Purchase Contracts Fuel Purchase Contracts Other Purchase Contracts 2017 $ 747 $ 1,619 $ 1,945 2018 827 1,838 1,671 2019 1,597 1,824 1,684 Future commitments for the year ending December 31, 2020 $ 699 $ 1,385 $ 1,551 2021 509 1,086 723 2022 406 756 538 2023 439 643 538 2024 459 568 529 Thereafter 5,110 2,601 1,745 Total $ 7,622 $ 7,039 $ 5,624

Contingencies (Tables)

Contingencies (Tables)	12 Months Ended
	Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]
Contingent Contractual Obligations	The following table summarizes the Parent Company's contingent contractual obligations as of December 31, 2019 . Amounts presented in the following table represent the Parent Company's current undiscounted exposure to guarantees and the range of maximum undiscounted potential exposure. The maximum exposure is not reduced by the amounts, if any, that could be recovered under the recourse or collateralization provisions in the guarantees. There were no obligations made by the Parent Company for the direct benefit of the lenders associated with the non-recourse debt of its businesses. Contingent Contractual Obligations Amount (in millions) Number of Agreements Maximum Exposure Range for Each Agreement (in millions) Guarantees and commitments $ 853 37 $0 — 157 Letters of credit under the unsecured credit facility 342 11 $1 — 296 Letters of credit under the senior secured credit facility 19 28 $0 — 4 Asset sale related indemnities (1) 12 1 $12 Total $ 1,226 77 _____________________________ (1) Excludes normal and customary representations and warranties in agreements for the sale of assets (including ownership in associated legal entities) where the associated risk is considered to be nominal.

Leases (Tables)

Leases (Tables)	12 Months Ended
	Dec. 31, 2019
Leases [Abstract]
Lessee, Operating Lease, Liability, Maturity [Table Text Block]	The following table shows the future lease payments under operating and finance leases for continuing operations together with the present value of the net lease payments as of December 31, 2019 for 2020 through 2024 and thereafter (in millions): Maturity of Lease Liabilities Finance Leases Operating Leases 2020 $ 4 $ 29 2021 4 27 2022 4 27 2023 4 26 2024 4 26 Thereafter 119 460 Total 139 595 Less: Imputed interest (69 ) (318 ) Present value of lease payments $ 70 $ 277
Schedule of Lease Assets and Liabilities - Lessee [Table Text Block]	The following table summarizes the amounts recognized on the Consolidated Balance Sheets related to lease asset and liability balances as of the period indicated (in millions): Consolidated Balance Sheet Classification December 31, 2019 Assets Right-of-use assets — finance leases Electric generation, distribution assets and other $ 67 Right-of-use assets — operating leases Other noncurrent assets 248 Total right-of-use assets $ 315 Liabilities Finance lease liabilities (current) Non-recourse debt (current liabilities) $ 3 Finance lease liabilities (noncurrent) Non-recourse debt (noncurrent liabilities) 67 Total finance lease liabilities 70 Operating lease liabilities (current) Accrued and other liabilities 16 Operating lease liabilities (noncurrent) Other noncurrent liabilities 261 Total operating lease liabilities 277 Total lease liabilities $ 347
Weighted-Average Lease Term and Discount Rate [Table Text Block]	The following table summarizes supplemental balance sheet information related to leases as of the period indicated: Lease Term and Discount Rate December 31, 2019 Weighted-average remaining lease term — finance leases 32 years Weighted-average remaining lease term — operating leases 23 years Weighted-average discount rate — finance leases 4.99 % Weighted-average discount rate — operating leases 6.99 %
Lease, Cost [Table Text Block]	The following table summarizes the components of lease expense recognized in Cost of Sales on the Consolidated Statements of Operations for the year ended (in millions): Components of Lease Cost December 31, 2019 Operating lease cost $ 46 Finance lease cost: Amortization of right-of-use assets 2 Interest on lease liabilities 2 Short-term lease costs 38 Variable lease cost 1 Total lease cost $ 89
Sales-type Lease, Lease Income [Table Text Block]	The following table shows the future lease receipts as of December 31, 2019 for 2020 through 2024 and thereafter (in millions): Future Cash Receipts for Sales-Type Leases Operating Leases 2020 $ 2 $ 504 2021 2 474 2022 2 459 2023 2 395 2024 2 396 Thereafter 38 1,463 Total 48 $ 3,691 Less: Imputed interest (26 ) Present value of total lease receipts $ 22

Benefit Plans (Tables)

Benefit Plans (Tables)	12 Months Ended
	Dec. 31, 2019
Retirement Benefits [Abstract]
Schedule of Net Funded Status	The following table reconciles the Company's funded status, both domestic and foreign, as of the periods indicated (in millions): 2019 2018 U.S. Foreign U.S. Foreign CHANGE IN PROJECTED BENEFIT OBLIGATION: Benefit obligation as of January 1 $ 1,118 $ 417 $ 1,257 $ 470 Service cost 11 8 15 12 Interest cost 44 19 40 22 Employee contributions — — — 1 Plan amendments — — 10 — Plan settlements — — — (21 ) Benefits paid (65 ) (9 ) (105 ) (17 ) Plan combinations — — — (4 ) Divestitures — (244 ) — — Actuarial (gain) loss 134 37 (99 ) (8 ) Effect of foreign currency exchange rate changes — (4 ) — (38 ) Benefit obligation as of December 31 $ 1,242 $ 224 $ 1,118 $ 417 CHANGE IN PLAN ASSETS: Fair value of plan assets as of January 1 $ 1,026 $ 410 $ 1,127 $ 455 Actual return on plan assets 185 19 (35 ) 6 Employer contributions 8 5 39 21 Employee contributions — — — 1 Plan settlements — — — (21 ) Benefits paid (65 ) (9 ) (105 ) (17 ) Divestitures — (296 ) — — Effect of foreign currency exchange rate changes — — — (35 ) Fair value of plan assets as of December 31 $ 1,154 $ 129 $ 1,026 $ 410 RECONCILIATION OF FUNDED STATUS Funded status as of December 31 $ (88 ) $ (95 ) $ (92 ) $ (7 )
Schedule of Amounts Recognized in Balance Sheet	The following table summarizes the amounts recognized on the Consolidated Balance Sheets related to the funded status of the DB Plans, both domestic and foreign, as of the periods indicated (in millions): December 31, 2019 2018 Amounts Recognized on the Consolidated Balance Sheets U.S. Foreign U.S. Foreign Noncurrent assets $ — $ — $ — $ 64 Accrued benefit liability—current — (7 ) — (6 ) Accrued benefit liability—noncurrent (88 ) (88 ) (92 ) (65 ) Net amount recognized at end of year $ (88 ) $ (95 ) $ (92 ) $ (7 )
Schedule of Accumulated and Projected Benefit Obligations	The following table summarizes the Company's U.S. and foreign accumulated benefit obligation as of the periods indicated (in millions): December 31, 2019 2018 U.S. Foreign U.S. Foreign Accumulated Benefit Obligation $ 1,224 $ 188 $ 1,101 $ 376 Information for pension plans with an accumulated benefit obligation in excess of plan assets: Projected benefit obligation $ 1,242 $ 197 $ 1,118 $ 89 Accumulated benefit obligation 1,224 178 1,101 79 Fair value of plan assets 1,154 114 1,026 33 Information for pension plans with a projected benefit obligation in excess of plan assets: Projected benefit obligation $ 1,242 $ 224 $ 1,118 $ 220 Fair value of plan assets 1,154 129 1,026 150
Schedule of Assumptions Used	The following table summarizes the significant weighted average assumptions used in the calculation of benefit obligation and net periodic benefit cost, both domestic and foreign, as of the periods indicated: December 31, 2019 2018 U.S. Foreign U.S. Foreign Benefit Obligation: Discount rate 3.32 % 7.58 % 4.35 % 5.63 % Rate of compensation increase 3.33 % 6.11 % 3.34 % 4.79 % Periodic Benefit Cost: Discount rate 4.35 % 5.62 % (1) 3.67 % 5.23 % (1) Expected long-term rate of return on plan assets 5.08 % 4.10 % 5.73 % 3.94 % Rate of compensation increase 3.34 % 4.78 % 3.34 % 4.65 % _____________________________ (1) Includes an inflation factor that is used to calculate future periodic benefit cost, but is not used to calculate the benefit obligation.
Impact Of One Percent Change In Assumptions	The impact on pension expense from a one percentage point change in these assumptions is shown in the following table (in millions): Increase of 1% in the discount rate $ (14 ) Decrease of 1% in the discount rate 10 Increase of 1% in the long-term rate of return on plan assets (11 ) Decrease of 1% in the long-term rate of return on plan assets 11
Schedule of Net Benefit Costs	The following table summarizes the components of the net periodic benefit cost, both domestic and foreign, for the years indicated (in millions): December 31, 2019 2018 2017 Components of Net Periodic Benefit Cost: U.S. Foreign U.S. Foreign U.S. Foreign Service cost $ 11 $ 8 $ 15 $ 12 $ 13 $ 10 Interest cost 44 19 40 22 41 23 Expected return on plan assets (52 ) (14 ) (64 ) (17 ) (69 ) (21 ) Amortization of prior service cost 5 — 5 — 6 — Amortization of net loss 15 1 18 3 18 2 Curtailment loss recognized — — 1 — 4 — Settlement loss recognized — — — 4 — — Total pension cost $ 23 $ 14 $ 15 $ 24 $ 13 $ 14
Schedule of Net Periodic Benefit Cost Not yet Recognized	The following table summarizes the amounts reflected in AOCL, including AOCL attributable to noncontrolling interests, on the Consolidated Balance Sheet as of December 31, 2019 , that have not yet been recognized as components of net periodic benefit cost (in millions): December 31, 2019 Accumulated Other Comprehensive Income (Loss) U.S. Foreign Prior service cost $ (4 ) $ 1 Unrecognized net actuarial loss (23 ) (63 ) Total $ (27 ) $ (62 )
Target / Actual Allocation Of Pension Plan Asset	The following table summarizes the Company's target allocation for 2019 and pension plan asset allocation, both domestic and foreign, as of the periods indicated: Percentage of Plan Assets as of December 31, Target Allocations 2019 2018 Asset Category U.S. Foreign U.S. Foreign U.S. Foreign Equity securities 33% 13% 32.22 % 15.37 % 16.85 % 3.75 % Debt securities 65% 81% 67.17 % 81.67 % 80.20 % 93.57 % Real estate 2% 2% 0.22 % 1.16 % 2.35 % 0.44 % Other —% 4% 0.39 % 1.80 % 0.60 % 2.24 % Total pension assets 100.00 % 100.00 % 100.00 % 100.00 %
Schedule of Allocation of Plan Assets	The asset allocation is reviewed periodically to determine a suitable asset allocation which seeks to manage risk through portfolio diversification and takes into account the above-stated objectives, in conjunction with current funding levels, cash flow conditions, and economic and industry trends. The following table summarizes the Company's U.S. DB Plan assets by category of investment and level within the fair value hierarchy as of the periods indicated (in millions): December 31, 2019 December 31, 2018 U.S. Plans Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Equity securities (2) : Mutual funds $ — $ 372 $ — $ 372 $ 173 $ — $ — $ 173 Debt securities (2) : Government debt securities — — — — 170 — — 170 Mutual funds (1) — 775 — 775 653 — — 653 Real estate (2) : Real estate — 3 — 3 — 24 — 24 Other: Cash and cash equivalents 4 — — 4 6 — — 6 Total plan assets $ 4 $ 1,150 $ — $ 1,154 $ 1,002 $ 24 $ — $ 1,026 _____________________________ (1)
Fair Value Of Plan Assets By Category / Level (Foreign)	The investment strategy of the foreign DB Plans seeks to maximize return on investment while minimizing risk. The assumed asset allocation has less exposure to equities in order to closely match market conditions and near term forecasts. The following table summarizes the Company's foreign DB plan assets by category of investment and level within the fair value hierarchy as of the periods indicated (in millions): December 31, 2019 December 31, 2018 Foreign Plans Level 1 Level 2 Level 3 Total Level 1 Level 2 Level 3 Total Equity securities: Mutual funds $ 19 $ — $ — $ 19 $ 14 $ — $ — $ 14 Private equity — — 1 1 — — 1 1 Debt securities: Government debt securities — — — — 13 — — 13 Mutual funds (1) 17 88 — 105 287 84 — 371 Real estate: Real estate — — 2 2 — — 2 2 Other: Cash and cash equivalents — — — — 2 — — 2 Other assets 1 — 1 2 1 — 6 7 Total plan assets $ 37 $ 88 $ 4 $ 129 $ 317 $ 84 $ 9 $ 410 _____________________________ (1) Mutual funds categorized as debt securities consist of mutual funds for which debt securities are the primary underlying investment.
Schedule of Effect of Significant Unobservable Inputs, Changes in Plan Assets	The following table summarizes the estimated cash flows for U.S. and foreign expected employer contributions and expected future benefit payments, both domestic and foreign (in millions): U.S. Foreign Expected employer contribution in 2020 $ 8 $ 8 Expected benefit payments for fiscal year ending: 2020 71 15 2021 72 13 2022 73 14 2023 73 15 2024 73 17 2025 - 2029 365 105
Scheduled Cash Flows For Employer Contributions And Expected Future Benefit Payments	The following table summarizes the estimated cash flows for U.S. and foreign expected employer contributions and expected future benefit payments, both domestic and foreign (in millions): U.S. Foreign Expected employer contribution in 2020 $ 8 $ 8 Expected benefit payments for fiscal year ending: 2020 71 15 2021 72 13 2022 73 14 2023 73 15 2024 73 17 2025 - 2029 365 105

Equity (Tables)

Equity (Tables)	12 Months Ended
	Dec. 31, 2019
Equity [Abstract]
Schedule of Net Income Attributable to Parent And Transfers To From Noncontrolling Interests [Text Block]	The following table summarizes the net income attributable to The AES Corporation and all transfers (to) from noncontrolling interests for the periods indicated (in millions): December 31, 2019 2018 2017 Net income (loss) attributable to The AES Corporation $ 303 $ 1,203 $ (1,161 ) Transfers from noncontrolling interest: Increase (decrease) in The AES Corporation's paid-in capital for sale of subsidiary shares (5 ) (3 ) 13 Increase (decrease) in The AES Corporation's paid-in-capital for purchase of subsidiary shares — — 240 Net transfers (to) from noncontrolling interest (5 ) (3 ) 253 Change from net income (loss) attributable to The AES Corporation and transfers (to) from noncontrolling interests $ 298 $ 1,200 $ (908 )
Components of Accumulated Other Comprehensive Income	The changes in AOCL by component, net of tax and noncontrolling interests, for the periods indicated were as follows (in millions): Foreign currency translation adjustment, net Derivative gains (losses), net Unfunded pension obligations, net Total Balance at December 31, 2017 $ (1,486 ) $ (333 ) $ (57 ) $ (1,876 ) Other comprehensive loss before reclassifications (214 ) (64 ) — (278 ) Amount reclassified to earnings (21 ) 78 7 64 Other comprehensive income (loss) $ (235 ) $ 14 $ 7 $ (214 ) Cumulative effect of a change in accounting principle — 19 — 19 Balance at December 31, 2018 $ (1,721 ) $ (300 ) $ (50 ) $ (2,071 ) Other comprehensive loss before reclassifications $ (23 ) $ (202 ) $ (15 ) $ (240 ) Amount reclassified to earnings 23 36 27 86 Other comprehensive income (loss) $ — $ (166 ) $ 12 $ (154 ) Cumulative effect of a change in accounting principle — (4 ) — (4 ) Balance at December 31, 2019 $ (1,721 ) $ (470 ) $ (38 ) $ (2,229 )
Reclassification out of Accumulated Other Comprehensive Income	Reclassifications out of AOCL are presented in the following table. Amounts for the periods indicated are in millions and those in parenthesis indicate debits to the Consolidated Statements of Operations: Details About December 31, AOCL Components Affected Line Item in the Consolidated Statements of Operations 2019 2018 2017 Foreign currency translation adjustments, net Gain (loss) on disposal and sale of business interests $ (23 ) $ 19 $ (188 ) Net gain from disposal of discontinued operations — 2 (455 ) Net income (loss) attributable to The AES Corporation $ (23 ) $ 21 $ (643 ) Derivative gains (losses), net Non-regulated revenue $ (1 ) $ (6 ) $ 25 Non-regulated cost of sales (12 ) (3 ) (12 ) Interest expense (26 ) (49 ) (79 ) Gain (loss) on disposal and sale of business interests 1 — — Foreign currency transaction gains (losses) (12 ) (59 ) 15 Income from continuing operations before taxes and equity in earnings of affiliates (50 ) (117 ) (51 ) Income tax expense 13 24 1 Net equity in earnings (losses) of affiliates (5 ) — — Income (loss) from continuing operations (42 ) (93 ) (50 ) Less: Income from continuing operations attributable to noncontrolling interests and redeemable stock of subsidiaries 6 15 13 Net income (loss) attributable to The AES Corporation $ (36 ) $ (78 ) $ (37 ) Amortization of defined benefit pension actuarial losses, net Non-regulated cost of sales — — 1 General and administrative expenses — — (1 ) Other expense (2 ) (6 ) — Gain (loss) on disposal and sale of business interests (26 ) — — Income from continuing operations before taxes and equity in earnings of affiliates (28 ) (6 ) — Income tax expense — 2 — Income (loss) from continuing operations (28 ) (4 ) — Net gain (loss) from disposal of discontinued operations — (2 ) (266 ) Net income (loss) (28 ) (6 ) (266 ) Less: Income from continuing operations attributable to noncontrolling interests and redeemable stock of subsidiaries 1 (1 ) — Add: Loss from discontinued operations attributable to noncontrolling interests — — 18 Net income (loss) attributable to The AES Corporation $ (27 ) $ (7 ) $ (248 ) Total reclassifications for the period, net of income tax and noncontrolling interests $ (86 ) $ (64 ) $ (928 )

Segment and Geographic Inform_2

Segment and Geographic Information (Tables)	12 Months Ended
	Dec. 31, 2019
Segment Reporting Information [Line Items]
Schedule of Segment Reporting Information, by Segment [Table Text Block]	The following tables present financial information by segment for the periods indicated (in millions): Total Revenue Year Ended December 31, 2019 2018 2017 US and Utilities SBU $ 4,058 $ 4,230 $ 4,162 South America SBU 3,208 3,533 3,252 MCAC SBU 1,882 1,728 1,519 Eurasia SBU 1,047 1,255 1,590 Corporate and Other 46 41 35 Eliminations (52 ) (51 ) (28 ) Total Revenue $ 10,189 $ 10,736 $ 10,530 Reconciliation from Income from Continuing Operations before Taxes and Equity in Earnings of Affiliates: Total Adjusted PTC Year Ended December 31, 2019 2018 2017 Income from continuing operations before taxes and equity in earnings of affiliates $ 1,001 $ 2,018 $ 771 Add: Net equity in earnings (losses) of affiliates (172 ) 39 71 Less: Income from continuing operations before taxes, attributable to noncontrolling interests (277 ) (509 ) (521 ) Pre-tax contribution 552 1,548 321 Unrealized derivative and equity securities losses (gains) 113 33 (3 ) Unrealized foreign currency losses (gains) 36 51 (59 ) Disposition/acquisition losses (gains) 12 (934 ) 123 Impairment expense 406 307 542 Loss on extinguishment of debt 121 180 62 Restructuring costs — — 31 Total Adjusted PTC $ 1,240 $ 1,185 $ 1,017 Total Adjusted PTC Year Ended December 31, 2019 2018 2017 US and Utilities SBU $ 569 $ 511 $ 424 South America SBU 504 519 446 MCAC SBU 367 300 277 Eurasia SBU 159 222 290 Corporate and Other (347 ) (346 ) (411 ) Eliminations (12 ) (21 ) (9 ) Total Adjusted PTC $ 1,240 $ 1,185 $ 1,017 Total Assets Depreciation and Amortization Capital Expenditures Year Ended December 31, 2019 2018 2017 2019 2018 2017 2019 2018 2017 US and Utilities SBU $ 13,334 $ 12,286 $ 11,548 $ 465 $ 449 $ 487 $ 1,484 $ 1,373 $ 905 South America SBU 11,314 10,941 11,126 315 300 301 692 662 477 MCAC SBU 4,770 4,462 4,087 183 141 122 344 302 435 Eurasia SBU 3,990 4,538 6,002 67 99 127 30 51 — 211 Discontinued operations — — 86 — — 123 — — 315 Corporate and Other 240 294 263 15 14 9 1 8 13 Total $ 33,648 $ 32,521 $ 33,112 $ 1,045 $ 1,003 $ 1,169 $ 2,551 $ 2,396 $ 2,356 Interest Income Interest Expense Year Ended December 31, 2019 2018 2017 2019 2018 2017 US and Utilities SBU $ 18 $ 10 $ 5 $ 301 $ 287 $ 315 South America SBU 95 92 95 285 283 297 MCAC SBU 22 20 13 142 124 111 Eurasia SBU 180 186 130 127 145 167 Corporate and Other 3 2 1 195 217 280 Total $ 318 $ 310 $ 244 $ 1,050 $ 1,056 $ 1,170 Investments in and Advances to Affiliates Net Equity in Earnings (Losses) of Affiliates Year Ended December 31, 2019 2018 2017 2019 2018 2017 US and Utilities SBU $ 465 $ 538 $ 535 $ 11 $ 35 $ 41 South America SBU 77 213 358 (129 ) 15 28 MCAC SBU 107 5 (5 ) (13 ) (7 ) (4 ) Eurasia SBU 215 293 307 (9 ) 14 9 Corporate and Other 102 65 2 (32 ) (18 ) (3 ) Total $ 966 $ 1,114 $ 1,197 $ (172 ) $ 39 $ 71
Revenue And PP&E By Country	The following table presents information, by country, about the Company's consolidated operations for each of the three years ended December 31, 2019 , 2018 , and 2017 , and as of December 31, 2019 and 2018 (in millions). Revenue is recorded in the country in which it is earned and assets are recorded in the country in which they are located. Total Revenue Property, Plant & Equipment, net Year Ended December 31, 2019 2018 2017 2019 2018 United States (1) $ 3,230 $ 3,462 $ 3,487 $ 9,706 $ 8,731 Non-U.S.: Chile 1,839 2,087 1,944 5,939 5,453 Dominican Republic 877 884 826 1,002 903 El Salvador 824 768 686 343 334 Panama 601 438 338 1,819 1,777 Brazil 525 527 541 1,260 1,287 Colombia 472 428 332 340 302 Bulgaria 459 426 367 1,104 1,183 Mexico 402 399 352 648 666 Argentina 373 487 435 392 234 Vietnam (2) 343 245 278 2 2 United Kingdom (3) 147 390 328 — 90 Jordan (4) 95 95 95 — 418 Philippines (5) — 93 449 — — Kazakhstan — — 67 — — Other Non-U.S. 2 7 5 19 16 Total Non-U.S. 6,959 7,274 7,043 12,868 12,665 Total $ 10,189 $ 10,736 $ 10,530 $ 22,574 $ 21,396 _____________________________ (1) Includes Puerto Rico revenues of $294 million , $257 million and $247 million for the years ended December 31, 2019 , 2018 and 2017 , respectively, and property, plant & equipment of $538 million and $553 million as of December 31, 2019 and 2018 , respectively. (2) The Mong Duong II power project is operated under a build, operate and transfer contract. Future expected payments for the construction performance obligation are recognized in Loan receivable on the Consolidated Balance Sheets. See Note 20 — Revenue for further information. (3) The Kilroot and Ballylumford property, plant and equipment was deconsolidated upon completion of the sale in June 2019. See Note 25 — Held-For-Sale and Dispositions for further information.

Share-Based Compensation (Table

Share-Based Compensation (Tables)	12 Months Ended
	Dec. 31, 2019
Share-based Payment Arrangement [Abstract]
Schedule of Share Based Compensation Summary of Financial Statement Components Restricted Stock Units Without Market Conditions	The following table summarizes the components of the Company's stock-based compensation related to its employee RSUs recognized in the Company's consolidated financial statements (in millions): December 31, 2019 2018 2017 RSU expense before income tax $ 10 $ 11 $ 17 Tax benefit (1 ) (2 ) (4 ) RSU expense, net of tax $ 9 $ 9 $ 13 Total value of RSUs converted (1) $ 12 $ 10 $ 10 Total fair value of RSUs vested $ 10 $ 16 $ 15 _____________________________ (1) Amount represents fair market value on the date of conversion.
Schedule of Share Based Compensation Restricted Stock Units Without Market Conditions Activity Table	A summary of the activity of RSUs for the year ended December 31, 2019 follows (RSUs in thousands): RSUs Weighted Average Grant Date Fair Values Weighted Average Remaining Vesting Term Nonvested at December 31, 2018 1,923 $ 10.80 Vested (996 ) 10.37 Forfeited and expired (68 ) 11.97 Granted 625 17.53 Nonvested at December 31, 2019 1,484 $ 13.73 1.4 Vested and expected to vest at December 31, 2019 1,360 $ 13.57
Schedule of Share Based Compensation Restricted Stock Units Without Market Condition Vested And Converted	The following table summarizes the RSUs that vested and were converted during the periods indicated (RSUs in thousands): Year Ended December 31, 2019 2018 2017 RSUs vested during the year 996 1,428 1,337 RSUs converted during the year, net of shares withheld for taxes 666 950 865 Shares withheld for taxes 329 478 472

Redeemable Stock of Subsidiar_2

Redeemable Stock of Subsidiaries Redeemable Stock of Subsidiaries (Tables)	12 Months Ended
	Dec. 31, 2019
Temporary Equity Disclosure [Abstract]
Redeemable Noncontrolling Interest [Table Text Block]	The following table is a reconciliation of changes in redeemable stock of subsidiaries (in millions): December 31, 2019 2018 Balance at the beginning of the period $ 879 $ 837 Contributions from holders of redeemable stock of subsidiaries 10 34 Net income (loss) attributable to redeemable stock of subsidiaries (7 ) 2 Fair value adjustment 6 4 Other comprehensive income (loss) attributable to redeemable stock of subsidiaries — 2 Balance at the end of the period $ 888 $ 879 The following table summarizes the Company's redeemable stock of subsidiaries balances as of the periods indicated (in millions): December 31, 2019 2018 IPALCO common stock $ 618 $ 618 Colon quotas (1) 210 201 IPL preferred stock 60 60 Total redeemable stock of subsidiaries $ 888 $ 879 _____________________________ (1) Characteristics of quotas are similar to common stock.

Revenue (Tables)

Revenue (Tables)	12 Months Ended
	Dec. 31, 2019
Revenue [Abstract]
Disaggregation of Revenue [Table Text Block]	The following table presents our revenue from contracts with customers and other revenue for the periods indicated (in millions): Year Ended December 31, 2019 US and Utilities SBU South America SBU MCAC SBU Eurasia SBU Corporate, Other and Eliminations Total Regulated Revenue Revenue from contracts with customers $ 2,979 $ — $ — $ — $ — $ 2,979 Other regulated revenue 49 — — — — 49 Total regulated revenue 3,028 — — — — 3,028 Non-Regulated Revenue Revenue from contracts with customers 767 3,205 1,788 799 (4 ) 6,555 Other non-regulated revenue (1) 263 3 94 248 (2 ) 606 Total non-regulated revenue 1,030 3,208 $ 1,882 1,047 (6 ) 7,161 Total revenue $ 4,058 $ 3,208 $ 1,882 $ 1,047 $ (6 ) $ 10,189 Year Ended December 31, 2018 US and Utilities SBU South America SBU MCAC SBU Eurasia SBU Corporate, Other and Eliminations Total Regulated Revenue Revenue from contracts with customers $ 2,885 $ — $ — $ — $ — $ 2,885 Other regulated revenue 54 — — — — 54 Total regulated revenue 2,939 — $ — — $ — 2,939 Non-Regulated Revenue Revenue from contracts with customers 972 3,529 1,642 $ 943 (11 ) $ 7,075 Other non-regulated revenue (1) 319 4 86 312 1 722 Total non-regulated revenue 1,291 $ 3,533 1,728 $ 1,255 (10 ) $ 7,797 Total revenue $ 4,230 $ 3,533 $ 1,728 $ 1,255 $ (10 ) $ 10,736 _____________________________ (1) Other non-regulated revenue primarily includes lease and derivative revenue not accounted for under ASC 606.

Other Income and Expense (Table

Other Income and Expense (Tables)	12 Months Ended
	Dec. 31, 2019
Other Income and Expenses [Abstract]
Components of Other Income	Year Ended December 31, 2019 2018 2017 Other Income Gain on insurance proceeds (1) $ 118 $ — $ — Gain on remeasurement of contingent consideration (2) — 32 — AFUDC (US Utilities) 3 8 26 Legal settlements (3) — — 60 Other 24 32 34 Total other income $ 145 $ 72 $ 120 Other Expenses Loss on commencement of sales-type leases (4) 36 — — Loss on sale and disposal of assets (5) 22 30 28 Non-service pension and other postretirement costs 17 10 1 Allowance for other receivables — 7 — Water rights write-off — — 19 Other 5 11 10 Total other expense $ 80 $ 58 $ 58
Components of Other Expense	Year Ended December 31, 2019 2018 2017 Other Income Gain on insurance proceeds (1) $ 118 $ — $ — Gain on remeasurement of contingent consideration (2) — 32 — AFUDC (US Utilities) 3 8 26 Legal settlements (3) — — 60 Other 24 32 34 Total other income $ 145 $ 72 $ 120 Other Expenses Loss on commencement of sales-type leases (4) 36 — — Loss on sale and disposal of assets (5) 22 30 28 Non-service pension and other postretirement costs 17 10 1 Allowance for other receivables — 7 — Water rights write-off — — 19 Other 5 11 10 Total other expense $ 80 $ 58 $ 58

Asset Impairment Expense (Table

Asset Impairment Expense (Tables)	12 Months Ended
	Dec. 31, 2019
Impairment or Disposal of Tangible Assets Disclosure [Abstract]
Details of Impairment of Long-Lived Assets Held and Used by Asset	Year ended December 31, (in millions) 2019 2018 2017 Kilroot and Ballylumford $ 115 $ — $ 37 Hawaii 60 — — Shady Point — 157 — Nejapa — 37 — DPL — — 175 Laurel Mountain — — 121 Kazakhstan Hydroelectric — — 92 Kazakhstan CHPs — — 94 Other 10 14 18 Total $ 185 $ 208 $ 537

Income Taxes (Tables)

Income Taxes (Tables)	12 Months Ended
	Dec. 31, 2019
Income Tax Disclosure [Abstract]
Income from Continuing Operations before taxes and equity in earnings of affiliates [Table Text Block]	The following table shows the income (loss) from continuing operations, before income taxes, net equity in earnings of affiliates and noncontrolling interests, for the periods indicated (in millions): December 31, 2019 2018 2017 U.S. $ (57 ) $ (218 ) $ (511 ) Non-U.S. 1,058 2,236 1,282 Total $ 1,001 $ 2,018 $ 771
Income Tax Expense On Continuing Operations	The following table summarizes the expense for income taxes on continuing operations for the periods indicated (in millions): December 31, 2019 2018 2017 Federal: Current $ (7 ) $ 7 $ — Deferred (4 ) 186 545 State: Current (1 ) 2 — Deferred — 5 1 Foreign: Current 368 378 335 Deferred (4 ) 130 109 Total $ 352 $ 708 $ 990
Reconciliation Of US Federal Income Tax Rates And AES Effective Tax Rate For The Current And Two Prior Years	The following table summarizes a reconciliation of the U.S. statutory federal income tax rate to the Company's effective tax rate as a percentage of income from continuing operations before taxes for the periods indicated: December 31, 2019 2018 2017 Statutory Federal tax rate 21 % 21 % 35 % State taxes, net of Federal tax benefit 6 % 2 % (7 )% Taxes on foreign earnings 12 % 9 % — % Valuation allowance (2 )% (2 )% 10 % Change in tax law (1 )% 6 % 90 % Other—net (1 )% (1 )% — % Effective tax rate 35 % 35 % 128 %
Schedule Of Income Tax Payable And Receivable	The following table summarizes the income taxes receivable and payable as of the periods indicated (in millions): December 31, 2019 2018 Income taxes receivable—current $ 131 $ 163 Income taxes receivable—noncurrent 10 8 Total income taxes receivable $ 141 $ 171 Income taxes payable—current $ 172 $ 210 Income taxes payable—noncurrent — 7 Total income taxes payable $ 172 $ 217
Summary Of Deferred Tax Assets And Liabilities	The following table summarizes deferred tax assets and liabilities, as of the periods indicated (in millions): December 31, 2019 2018 Differences between book and tax basis of property $ (1,426 ) $ (1,418 ) Other taxable temporary differences (287 ) (243 ) Total deferred tax liability (1,713 ) (1,661 ) Operating loss carryforwards 1,060 1,066 Capital loss carryforwards 57 52 Bad debt and other book provisions 74 62 Tax credit carryforwards 33 55 Other deductible temporary differences 256 111 Total gross deferred tax asset 1,480 1,346 Less: valuation allowance (824 ) (868 ) Total net deferred tax asset 656 478 Net deferred tax liability $ (1,057 ) $ (1,183 )
Uncertain Tax Positions [Table Text Block]	The following table shows the total amount of gross accrued income taxes related to interest and penalties included in the Consolidated Balance Sheets for the periods indicated (in millions): December 31, 2019 2018 Interest related $ 2 $ 4 Penalties related — — The following table shows the expense/(benefit) related to interest and penalties on unrecognized tax benefits for the periods indicated (in millions): December 31, 2019 2018 2017 Total expense (benefit) for interest related to unrecognized tax benefits $ (2 ) $ (3 ) $ 1 Total expense for penalties related to unrecognized tax benefits — — —
Tax Years Potentially Subject To Examination And Jurisdictions	The following is a summary of tax years potentially subject to examination in the significant tax and business jurisdictions in which we operate: Jurisdiction Tax Years Subject to Examination Argentina 2014-2019 Brazil 2014-2019 Chile 2016-2019 Colombia 2016-2019 Dominican Republic 2015-2019 El Salvador 2017-2019 Netherlands 2013-2019 Panama 2016-2019 United Kingdom 2016-2019 United States (Federal) 2016-2019
Unrecognized Tax Benefits	The following is a reconciliation of the beginning and ending amounts of unrecognized tax benefits for the periods indicated (in millions): 2019 2018 2017 Balance at January 1 $ 463 $ 348 $ 352 Additions for current year tax positions 6 2 — Additions for tax positions of prior years 4 146 2 Reductions for tax positions of prior years (5 ) (26 ) (5 ) Lapse of statute of limitations (3 ) (7 ) (1 ) Balance at December 31 $ 465 $ 463 $ 348

Discontinued Operations and Hel

Discontinued Operations and Held-For-Sale Businesses (Tables)	12 Months Ended
	Dec. 31, 2019
Discontinued Operations [Abstract]
Disposal Groups, Including Discontinued Operations [Table Text Block]	Excluding any impairment charge or gain/loss on sale, pre-tax income (loss) attributable to AES of disposed businesses was as follows (in millions): Year Ended December 31, 2019 2018 2017 Kilroot and Ballylumford $ (1 ) $ 35 $ 38 Stuart and Killen (1)(2) 52 77 17 Shady Point (5 ) 19 19 Masinloc — 9 103 Zimmer and Miami Fort — — 26 Kazakhstan Hydroelectric — — 33 Other — 21 39 Total $ 46 $ 161 $ 275 _____________________________ (1) After the retirement of Stuart and Killen in 2018, the Company entered into contracts to buy back all open capacity years for the plants at prices lower than the PJM capacity revenue prices. As such, the Company continued to earn capacity margin until the plants were transferred in December 2019. (2) Reductions in the asset retirement obligations for ash ponds and landfills at Stuart and Killen in 2018 resulted in a $32 million reduction to cost of sales. See Note 4 — Asset Retirement Obligations for further information.
Discontinued operations, major line items constituting income (loss) from discontinued operation [Table Text Block]	The following table summarizes the major line items constituting loss from discontinued operations for the period indicated (in millions): December 31, 2017 Income (loss) from discontinued operations, net of tax: Revenue — regulated $ 3,320 Cost of sales (3,151 ) Other income and expense items that are not major (1) (166 ) Income from operations of discontinued businesses 3 Loss from disposal and impairments of discontinued businesses (611 ) Loss from discontinued operations (608 ) Less: Net income attributable to noncontrolling interests (25 ) Loss from discontinued operations attributable to The AES Corporation (633 ) Income tax expense (21 ) Loss from discontinued operations, net of tax $ (654 ) _____________________________ (1) Includes a loss contingency recognized by our equity method investment in discontinued operations.
Operating and Investing cash flow impact for discontinued operations [Table Text Block]	The following table summarizes the operating and investing cash flows from discontinued operations for the period indicated (in millions): December 31, 2017 Cash flows provided by operating activities of discontinued operations $ 164 Cash flows used in investing activities of discontinued operations (288 )

Held-For-Sale Businesses and Di

Held-For-Sale Businesses and Dispositions Held-For-Sale Businesses and Dispositions (Tables)	12 Months Ended
	Dec. 31, 2019
Held-For-Sale Businesses and Dispositions [Abstract]
Disposal Groups, Including Discontinued Operations [Table Text Block]	Excluding any impairment charge or gain/loss on sale, pre-tax income (loss) attributable to AES of disposed businesses was as follows (in millions): Year Ended December 31, 2019 2018 2017 Kilroot and Ballylumford $ (1 ) $ 35 $ 38 Stuart and Killen (1)(2) 52 77 17 Shady Point (5 ) 19 19 Masinloc — 9 103 Zimmer and Miami Fort — — 26 Kazakhstan Hydroelectric — — 33 Other — 21 39 Total $ 46 $ 161 $ 275 _____________________________ (1) After the retirement of Stuart and Killen in 2018, the Company entered into contracts to buy back all open capacity years for the plants at prices lower than the PJM capacity revenue prices. As such, the Company continued to earn capacity margin until the plants were transferred in December 2019. (2) Reductions in the asset retirement obligations for ash ponds and landfills at Stuart and Killen in 2018 resulted in a $32 million reduction to cost of sales. See Note 4 — Asset Retirement Obligations for further information.

Earnings Per Share (Tables)

Earnings Per Share (Tables)	12 Months Ended
	Dec. 31, 2019
Earnings Per Share [Abstract]
Earnings Per Share Basic And Diluted Table	The following table is a reconciliation of the numerator and denominator of the basic and diluted earnings per share computation for income from continuing operations for the years ended December 31, 2019 , 2018 and 2017 , where income represents the numerator and weighted-average shares represent the denominator. Year Ended December 31, 2019 2018 2017 (in millions, except per share data) Income Shares $ per Share Income Shares $ per Share Loss Shares $ per Share BASIC EARNINGS (LOSS) PER SHARE Income (loss) from continuing operations attributable to The AES Corporation common stockholders $ 302 664 $ 0.46 $ 985 662 $ 1.49 $ (507 ) 660 $ (0.77 ) EFFECT OF DILUTIVE SECURITIES Restricted stock units — 3 (0.01 ) — 3 (0.01 ) — — — DILUTED EARNINGS (LOSS) PER SHARE $ 302 667 $ 0.45 $ 985 665 $ 1.48 $ (507 ) 660 $ (0.77 )

Related Party Transactions (Tab

Related Party Transactions (Tables)	12 Months Ended
	Dec. 31, 2019
Related Party Transactions [Abstract]
Schedule of Related Party Transactions	The Company's Consolidated Statements of Operations included the following transactions with related parties for the periods indicated (in millions): Years Ended December 31, 2019 2018 2017 Revenue—Non-Regulated $ 1,544 $ 1,533 $ 1,297 Cost of Sales—Non-Regulated 531 342 220 Interest income 21 14 8 Interest expense 74 54 36
Schedule of Related Party Receivables Payables	The following table summarizes the balances receivable from and payable to related parties included in the Company's Consolidated Balance Sheets as of the periods indicated (in millions): December 31, 2019 2018 Receivables from related parties $ 370 $ 371 Accounts and notes payable to related parties (1) 1,976 754

Selected Quarterly Financial _2

Selected Quarterly Financial Data (Tables)	12 Months Ended
	Dec. 31, 2019
Quarterly Financial Information Disclosure [Abstract]
Schedule of Quarterly Financial Information	Quarterly Financial Data — The following tables summarize the unaudited quarterly Condensed Consolidated Statements of Operations for the Company for 2019 and 2018 (amounts in millions, except per share data). Amounts have been restated to reflect discontinued operations in all periods presented and reflect all adjustments necessary in the opinion of management for a fair statement of the results for interim periods. Quarter Ended 2019 Mar 31 Jun 30 Sep 30 Dec 31 Revenue $ 2,650 $ 2,483 $ 2,625 $ 2,431 Operating margin 586 502 701 560 Income (loss) from continuing operations, net of tax (1) 233 66 298 (120 ) Income from discontinued operations, net of tax — 1 — — Net income (loss) $ 233 $ 67 $ 298 $ (120 ) Net income (loss) attributable to The AES Corporation $ 154 $ 17 $ 210 $ (78 ) Basic earnings (loss) per share: Income (loss) from continuing operations attributable to The AES Corporation common stockholders, net of tax $ 0.23 $ 0.02 $ 0.32 $ (0.12 ) Income from discontinued operations attributable to The AES Corporation common stockholders, net of tax — — — — Net income (loss) attributable to The AES Corporation common stockholders $ 0.23 $ 0.02 $ 0.32 $ (0.12 ) Diluted earnings (loss) per share: Income (loss) from continuing operations attributable to The AES Corporation common stockholders, net of tax $ 0.23 $ 0.02 $ 0.32 $ (0.12 ) Income from discontinued operations attributable to The AES Corporation common stockholders, net of tax — — — — Net income (loss) attributable to The AES Corporation common stockholders $ 0.23 $ 0.02 $ 0.32 $ (0.12 ) Dividends declared per common share $ 0.14 $ — $ 0.14 $ 0.28 Quarter Ended 2018 Mar 31 Jun 30 Sep 30 Dec 31 Revenue $ 2,740 $ 2,537 $ 2,837 $ 2,622 Operating margin 656 600 671 646 Income from continuing operations, net of tax (2) 778 224 192 155 Income (loss) from discontinued operations, net of tax (3) (1 ) 192 (1 ) 26 Net income $ 777 $ 416 $ 191 $ 181 Net income attributable to The AES Corporation $ 684 $ 290 $ 101 $ 128 Basic earnings per share: Income from continuing operations attributable to The AES Corporation common stockholders, net of tax $ 1.04 $ 0.15 $ 0.15 $ 0.15 Income from discontinued operations attributable to The AES Corporation common stockholders, net of tax — 0.29 — 0.04 Net income attributable to The AES Corporation common stockholders $ 1.04 $ 0.44 $ 0.15 $ 0.19 Diluted earnings per share: Income from continuing operations attributable to The AES Corporation common stockholders, net of tax $ 1.03 $ 0.15 $ 0.15 $ 0.15 Income from discontinued operations attributable to The AES Corporation common stockholders, net of tax — 0.29 — 0.04 Net income attributable to The AES Corporation common stockholders $ 1.03 $ 0.44 $ 0.15 $ 0.19 Dividends declared per common share $ 0.13 $ — $ 0.13 $ 0.27 _____________________________ (1) Includes pre-tax impairment expense of $116 million and $69 million , in the second and fourth quarters of 2019 , respectively (See Note 22 — Asset Impairment Expense ), other-than-temporary impairment of OPGC of $92 million and net equity in losses of affiliates, primarily at Guacolda, of $175 million , in the fourth quarter of 2019 (See Note 8 — Investments in and Advances to Affiliates ). (2) Includes pre-tax gains on sales of business interests of $788 million , $89 million and $128 million , in the first, second and fourth quarters of 2018 , respectively, and pre-tax losses of $21 million in the third quarter of 2018 (See Note 25 — Held-for-Sale and Dispositions ), pre-tax impairment expense of $92 million , $74 million and $42 million , in the second, third and fourth quarters of 2018 , respectively (See Note 22 — Asset Impairment Expense ), other-than-temporary impairment of Guacolda of $144 million in the fourth quarter of 2018 (See Note 8 — Investments in and Advances to Affiliates ), SAB 118 charges to finalize the provisional estimate of one-time transition tax on foreign earnings of $33 million and $161 million in the third and fourth quarters of 2018 , respectively, and a SAB 118 income tax benefit to finalize the provisional estimate of remeasurement of deferred tax assets and liabilities to the lower corporate tax rate of $77 million in the fourth quarter of 2018 (See Note 23 — Income Taxes ). (3) Includes gain on sale of Eletropaulo of $199 million in the second quarter of 2018 (See Note 24 — Discontinued Operations ).

Schedule I - Condensed Financ_2

Schedule I - Condensed Financial Information of Parent (Tables)	12 Months Ended
	Dec. 31, 2019
Debt Details [Line Items]
Schedule of Recourse Debt Detail	The following table summarizes the carrying amount and terms of recourse debt of the Company as of the periods indicated (in millions): Interest Rate Final Maturity December 31, 2019 December 31, 2018 Senior Unsecured Note 4.00% 2021 500 500 Senior Secured Term Loan LIBOR + 1.75% 2022 18 366 Senior Unsecured Note 4.875% 2023 613 713 Senior Unsecured Note 4.50% 2023 500 500 Drawings on secured credit facility LIBOR + 1.75% 2024 180 — Senior Unsecured Note 5.50% 2024 63 63 Senior Unsecured Note 5.50% 2025 544 544 Senior Unsecured Note 6.00% 2026 500 500 Senior Unsecured Note 5.125% 2027 500 500 Unamortized (discount) premium & debt issuance (costs), net (22 ) (31 ) Subtotal $ 3,396 $ 3,655 Less: Current maturities (5 ) (5 ) Noncurrent maturities $ 3,391 $ 3,650 December 31, Interest Rate Maturity 2019 2018 Senior Unsecured Note 4.00% 2021 500 500 Senior Secured Term Loan LIBOR + 1.75% 2022 18 366 Senior Unsecured Note 4.875% 2023 613 713 Senior Unsecured Note 4.50% 2023 500 500 Drawings on secured credit facility LIBOR + 1.75% 2024 180 — Senior Unsecured Note 5.50% 2024 63 63 Senior Unsecured Note 5.50% 2025 544 544 Senior Unsecured Note 6.00% 2026 500 500 Senior Unsecured Note 5.125% 2027 500 500 Unamortized (discounts)/premiums & debt issuance (costs) (22 ) (31 ) Subtotal $ 3,396 $ 3,655 Less: Current maturities (5 ) (5 ) Total $ 3,391 $ 3,650
Junior Subordinated Notes Payable	December 31, Interest Rate Maturity 2019 2018 Senior Unsecured Note 4.00% 2021 500 500 Senior Secured Term Loan LIBOR + 1.75% 2022 18 366 Senior Unsecured Note 4.875% 2023 613 713 Senior Unsecured Note 4.50% 2023 500 500 Drawings on secured credit facility LIBOR + 1.75% 2024 180 — Senior Unsecured Note 5.50% 2024 63 63 Senior Unsecured Note 5.50% 2025 544 544 Senior Unsecured Note 6.00% 2026 500 500 Senior Unsecured Note 5.125% 2027 500 500 Unamortized (discounts)/premiums & debt issuance (costs) (22 ) (31 ) Subtotal $ 3,396 $ 3,655 Less: Current maturities (5 ) (5 ) Total $ 3,391 $ 3,650
Future Maturities of Debt	The following table summarizes the principal amounts due under our recourse debt for the next five years and thereafter (in millions): December 31, Net Principal Amounts Due 2020 $ 5 2021 505 2022 8 2023 1,113 2024 243 Thereafter 1,544 Unamortized (discount) premium & debt issuance (costs), net (22 ) Total recourse debt $ 3,396 2019 scheduled maturities are presented in the following table (in millions): December 31, Annual Maturities 2020 $ 5 2021 505 2022 8 2023 1,113 2024 243 Thereafter 1,544 Unamortized (discount)/premium & debt issuance (costs) (22 ) Total debt $ 3,396

General and Summary of Signif_4

General and Summary of Significant Accounting Policies (Finite Lived Intangible Assets) (Details)	12 Months Ended
	Dec. 31, 2019
Minimum
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	1 year
Maximum
Finite-Lived Intangible Assets [Line Items]
Finite-Lived Intangible Asset, Useful Life	50 years

General and Summary of Signif_5

General and Summary of Significant Accounting Policies New Accounting Pronouncements Adopted (Details) - USD ($) $ in Millions	3 Months Ended														12 Months Ended
	Dec. 31, 2019		Sep. 30, 2019	Jun. 30, 2019		Mar. 31, 2019	Dec. 31, 2018		Sep. 30, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2019	Jan. 01, 2018	Dec. 31, 2016
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, after Allowance for Credit Loss	$ 109						$ 116								$ 109	$ 116
Other Assets, Noncurrent	1,635						1,514								1,635	1,514		$ 1,767
Operating Lease, Right-of-Use Asset	248														248
Revenues	2,431		$ 2,625	$ 2,483		$ 2,650	2,622		$ 2,837		$ 2,537		$ 2,740		10,189	10,736	$ 10,530
Cost of Goods and Services Sold															(7,840)	(8,163)	(8,065)
Gross Profit	560		701	502		586	646		671		600		656		2,349	2,573	2,465
Interest income															318	310	244
Other Income															145	72	120
Other Assets, Current	802						807								802	807	630		$ 691
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent	156						97								156	97	130		106
Service Concession Assets							0									0	1,360		0
Financing Receivable, before Allowance for Credit Loss, Noncurrent	1,351						1,423								1,351	1,423	0		1,490
Assets	33,648						32,521								33,648	32,521	33,112
Retained Earnings (Accumulated Deficit)	(692)						(1,005)								(692)	(1,005)	(2,276)		(2,209)
Cash and Cash Equivalents, at Carrying Value	1,029						1,166								1,029	1,166
Restricted Cash and Cash Equivalents, Current	336						370								336	370
Other Comprehensive Income (Loss), Effect of Change in Accounting Principle, Net of Taxes															(227)	(151)	919
Debt service reserves and other deposits	207						467								207	467
Cash, Cash Equivalents, Restricted Cash and Restricted Cash Equivalents	1,572						2,003								1,572	2,003	1,788			$ 1,960
Accumulated Other Comprehensive Income (Loss), Net of Tax	(2,229)						(2,071)								(2,229)	(2,071)	(1,876)		(1,857)
Stockholders' Equity Attributable to Noncontrolling Interest	2,233						2,396								2,233	2,396	2,380		2,461
Liabilities and Equity	33,648						32,521								33,648	32,521
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest															1,001	2,018	771
Income (Loss) from Continuing Operations, net of Tax	(120)	[1]	298	66	[1]	233	155	[2]	192	[2]	224	[2]	778	[2]	477	1,349	(148)
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest	(120)		298	67		233	181		191		416		777		478	1,565	(777)
NET INCOME (LOSS) ATTRIBUTABLE TO THE AES CORPORATION	(78)		$ 210	$ 17		$ 154	128		$ 101		$ 290		$ 684		303	1,203	(1,161)
Accrued Liabilities, Current	1,021						962								1,021	962		989
Other Liabilities, Noncurrent	2,917						2,723								2,917	2,723		2,949
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	580						578								580	578
Accounting Standards Update 2016-13 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Accounts Receivable, before Allowance for Credit Loss, Current	1,500														1,500
Financing Receivable, before Allowance for Credit Loss, Noncurrent	1,400														1,400
Accounting Standards Update 2016-02 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Other Assets, Noncurrent							253									253
Accrued Liabilities, Current							27									27
Other Liabilities, Noncurrent							226									226
Balance Without the Adoption of ASC 606 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues																10,800
Cost of Goods and Services Sold																8,207
Gross Profit																2,593
Interest income																252
Other Income																70
Other Assets, Current							741									741
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent							122									122
Service Concession Assets							1,261									1,261
Financing Receivable, before Allowance for Credit Loss, Noncurrent							0									0
Assets							32,318									32,318
Retained Earnings (Accumulated Deficit)							(1,112)									(1,112)
Accumulated Other Comprehensive Income (Loss), Net of Tax							(2,088)									(2,088)
Stockholders' Equity Attributable to Noncontrolling Interest							2,317									2,317
Liabilities and Equity							32,318									32,318
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest																1,978
Income (Loss) from Continuing Operations, net of Tax																1,309
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest																1,525
NET INCOME (LOSS) ATTRIBUTABLE TO THE AES CORPORATION																1,163
ASC 606 Impact [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Revenues																(64)
Cost of Goods and Services Sold																(44)
Gross Profit																(20)
Interest income																58
Other Income																2
Other Assets, Current							66									66			61
Deferred Tax Assets, Net of Valuation Allowance, Noncurrent							(25)									(25)			(24)
Service Concession Assets							(1,261)									(1,261)			(1,360)
Financing Receivable, before Allowance for Credit Loss, Noncurrent							1,423									1,423			1,490
Assets							203									203
Retained Earnings (Accumulated Deficit)							107									107			67
Accumulated Other Comprehensive Income (Loss), Net of Tax							17									17			19
Stockholders' Equity Attributable to Noncontrolling Interest							79									79			$ 81
Liabilities and Equity							203									203
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Noncontrolling Interest																40
Income (Loss) from Continuing Operations, net of Tax																40
Net Income (Loss), Including Portion Attributable to Noncontrolling Interest																40
NET INCOME (LOSS) ATTRIBUTABLE TO THE AES CORPORATION																40
Retained Earnings [Member] | Accounting Standards Update 2017-12 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets																		4
Retained Earnings [Member] | Accounting Standard Update 2014-09 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
New Accounting Pronouncement or Change in Accounting Principle, Cumulative Effect of Change on Equity or Net Assets																		$ 6
Debt Securities [Member] | Accounting Standards Update 2016-13 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	326														326
ARGENTINA
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, after Allowance for Credit Loss	64						$ 93								64	93
Revenues															373	$ 487	$ 435
ARGENTINA | Accounting Standards Update 2016-13 [Member]
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Financing Receivable, after Allowance for Credit Loss	$ 64														$ 64
[1]	Includes pre-tax impairment expense of $116 million and $69 million , in the second and fourth quarters of 2019 , respectively (See Note 22 — Asset Impairment Expense ), other-than-temporary impairment of OPGC of $92 million and net equity in losses of affiliates, primarily at Guacolda, of $175 million , in the fourth quarter of 2019 (See Note 8 — Investments in and Advances to Affiliates ).
[2]	Includes pre-tax gains on sales of business interests of $788 million , $89 million and $128 million , in the first, second and fourth quarters of 2018 , respectively, and pre-tax losses of $21 million in the third quarter of 2018 (See Note 25 — Held-for-Sale and Dispositions ), pre-tax impairment expense of $92 million , $74 million and $42 million , in the second, third and fourth quarters of 2018 , respectively (See Note 22 — Asset Impairment Expense ), other-than-temporary impairment of Guacolda of $144 million in the fourth quarter of 2018 (See Note 8 — Investments in and Advances to Affiliates ), SAB 118 charges to finalize the provisional estimate of one-time transition tax on foreign earnings of $33 million and $161 million in the third and fourth quarters of 2018 , respectively, and a SAB 118 income tax benefit to finalize the provisional estimate of remeasurement of deferred tax assets and liabilities to the lower corporate tax rate of $77 million in the fourth quarter of 2018 (See Note 23 — Income Taxes ).

Inventory (Details)

Inventory (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Inventory Disclosure [Abstract]
Fuel and other raw materials	$ 230	$ 300
Spare parts and supplies	257	277
Total	$ 487	$ 577

Property, Plant and Equipment_2

Property, Plant and Equipment (Components of PP&E) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Electric generation, distribution assets and other	$ 25,383	$ 25,242
Accumulated depreciation	(8,505)	(8,227)
Property, Plant and Equipment, Net	16,878	17,015
Electric generation and distribution facilities
Property, Plant and Equipment [Line Items]
Electric generation, distribution assets and other	$ 22,869	22,875
Electric generation and distribution facilities | Minimum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	7 years
Electric generation and distribution facilities | Maximum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	40 years
Other buildings
Property, Plant and Equipment [Line Items]
Electric generation, distribution assets and other	$ 1,612	1,651
Other buildings | Minimum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Other buildings | Maximum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	72 years
Furniture and Fixtures [Member]
Property, Plant and Equipment [Line Items]
Electric generation, distribution assets and other	$ 319	310
Furniture and Fixtures [Member] | Minimum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	3 years
Furniture and Fixtures [Member] | Maximum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	25 years
Other
Property, Plant and Equipment [Line Items]
Electric generation, distribution assets and other	$ 583	$ 406
Other | Minimum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	5 years
Other | Maximum
Property, Plant and Equipment [Line Items]
Property, Plant and Equipment, Useful Life	44 years

Property, Plant and Equipment_3

Property, Plant and Equipment (Depreciation Expense, Software Amortization and Capitalized Interest) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Property, Plant and Equipment [Abstract]
Depreciation expense	$ 977	$ 960	$ 1,005
Interest capitalized during development and construction	238	199	$ 139
Property plant and equipment, net of accumulated depreciation mortgaged, pledged or subject to liens	$ 10,000	$ 11,000

Property, Plant and Equipment_4

Property, Plant and Equipment (Regulated and Non-Regulated Generation and Distribution PP&E) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Property, Plant and Equipment [Line Items]
Electric generation, distribution assets and other	$ 25,383	$ 25,242
Accumulated depreciation	(8,505)	(8,227)
Net electric generation and distribution assets and other	16,878	17,015
Regulated Operation [Member]
Property, Plant and Equipment [Line Items]
Electric generation, distribution assets and other	9,246	8,959
Accumulated depreciation	(3,707)	(3,504)
Net electric generation and distribution assets and other	5,539	5,455
Unregulated Operation [Member]
Property, Plant and Equipment [Line Items]
Electric generation, distribution assets and other	16,137	16,283
Accumulated depreciation	(4,798)	(4,723)
Net electric generation and distribution assets and other	$ 11,339	$ 11,560

Asset Retirement Obligation (De

Asset Retirement Obligation (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Asset Retirement Obligation	$ 428	$ 415	$ 368
Asset Retirement Obligation, Liabilities Incurred	19	19
Asset Retirement Obligation, Liabilities Settled	12	14
Asset Retirement Obligation, Accretion Expense	21	18
Asset Retirement Obligation, Revision of Estimate	58	24
Asset Retirement Obligations, Sale of Plants	(71)	0
Asset Retirement Obligation, Other	(2)	0
IPL Subsidiary [Member]
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Asset Retirement Obligation, Revision of Estimate	75	55
DPL Subsidiary
Asset Retirement Obligation, Roll Forward Analysis [Roll Forward]
Asset Retirement Obligation, Revision of Estimate	$ 87	$ 32

Fair Value (Recurring Measureme

Fair Value (Recurring Measurements) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019		Dec. 31, 2018	Dec. 31, 2017
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Noncash or Part Noncash Acquisition, Debt Assumed	$ 0		$ 119	$ 0
Proceeds from Sale of Available-for-sale Securities	663	[1]	1,403	$ 1,398
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	580		578
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	424		257
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	22		19
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	0		0
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	463		355
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	227		116
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	95		204
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	197		141
Derivative [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	171		262
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	424		257
Derivative [Member] | Commodity Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	31		3
Derivative [Member] | Interest rate derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	328		208
Derivative [Member] | Cross-currency derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	21		5
Derivative [Member] | Foreign currency derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	44		41
Derivative [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	0		0
Derivative [Member] | Level 1 | Commodity Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	0		0
Derivative [Member] | Level 1 | Interest rate derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	0		0
Derivative [Member] | Level 1 | Cross-currency derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	0		0
Derivative [Member] | Level 1 | Foreign currency derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	0		0
Derivative [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	76		58
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	227		116
Derivative [Member] | Level 2 | Commodity Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	29		3
Derivative [Member] | Level 2 | Interest rate derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	144		67
Derivative [Member] | Level 2 | Cross-currency derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	10		5
Derivative [Member] | Level 2 | Foreign currency derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	44		41
Derivative [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	95		204
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	197		141
Derivative [Member] | Level 3 | Commodity Contract [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	2		0
Derivative [Member] | Level 3 | Interest rate derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	184		141
Derivative [Member] | Level 3 | Cross-currency derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	11		0
Derivative [Member] | Level 3 | Foreign currency derivatives
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability Value	0		0
Other debt securities | Available-for-sale Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0		5
Other debt securities | Available-for-sale Securities [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0		0
Other debt securities | Available-for-sale Securities [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0		5
Other debt securities | Available-for-sale Securities [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0		0
Commodity Contract [Member] | Derivative [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	30		10
Commodity Contract [Member] | Derivative [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0		0
Commodity Contract [Member] | Derivative [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	28		6
Commodity Contract [Member] | Derivative [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	2		4
Certificates of Deposit [Member] | Available-for-sale Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	326		243
Certificates of Deposit [Member] | Available-for-sale Securities [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0		0
Certificates of Deposit [Member] | Available-for-sale Securities [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	326		243
Certificates of Deposit [Member] | Available-for-sale Securities [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0		0
Debt securities | Available-for-sale Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	326		248
Debt securities | Available-for-sale Securities [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0		0
Debt securities | Available-for-sale Securities [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	326		248
Debt securities | Available-for-sale Securities [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0		0
Mutual Fund [Member] | Available-for-sale Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	83
Mutual Fund [Member] | Available-for-sale Securities [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	22
Mutual Fund [Member] | Available-for-sale Securities [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	61
Mutual Fund [Member] | Available-for-sale Securities [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0
Equity Funds [Member] | Available-for-sale Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value			68
Equity Funds [Member] | Available-for-sale Securities [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value			19
Equity Funds [Member] | Available-for-sale Securities [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value			49
Equity Funds [Member] | Available-for-sale Securities [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value			0
Equity securities | Available-for-sale Securities [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	83		68
Equity securities | Available-for-sale Securities [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	22		19
Equity securities | Available-for-sale Securities [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	61		49
Equity securities | Available-for-sale Securities [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0		0
Foreign currency derivatives | Derivative [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	110		217
Foreign currency derivatives | Derivative [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0		0
Foreign currency derivatives | Derivative [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	17		18
Foreign currency derivatives | Derivative [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	93		199
Cross-currency derivatives | Derivative [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0		6
Cross-currency derivatives | Derivative [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0		0
Cross-currency derivatives | Derivative [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0		6
Cross-currency derivatives | Derivative [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0		0
Interest rate derivatives | Derivative [Member]
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	31		29
Interest rate derivatives | Derivative [Member] | Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	0		0
Interest rate derivatives | Derivative [Member] | Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	31		28
Interest rate derivatives | Derivative [Member] | Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value	$ 0		$ 1
[1]	Proceeds in the year ended December 31, 2018 include $119 million of non-cash proceeds from non-convertible debentures at Guaimbê Solar Complex. See Note 26 —Acquisitions for further information.

Fair Value (Level 3 Reconciliat

Fair Value (Level 3 Reconciliation) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Assets Liabilities Value	$ (102)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	68	$ (7)
Included in regulatory (assets) liabilities	(5)	5
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements	13	17
Fair Value, Net Derivative Liability Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3	13	8
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		9
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers out of Level 3	48
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	(102)	63	$ 93
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease)	(69)	(13)
Commodity Contract [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	(2)	(1)
Included in regulatory (assets) liabilities	(5)	5
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements	2	(4)
Fair Value, Net Derivative Liability Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers out of Level 3	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	(1)	4	4
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease)	(2)	(1)
Foreign Exchange Contract [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	(65)	(14)
Included in regulatory (assets) liabilities	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements	(23)	(27)
Fair Value, Net Derivative Liability Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3	0	0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		0
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers out of Level 3	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	94	199	240
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease)	(67)	(41)
Interest Rate Contract
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	(1)	22
Included in regulatory (assets) liabilities	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements	8	14
Fair Value, Net Derivative Liability Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3	2	8
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers out of Level 3		9
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers out of Level 3	48
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	(184)	(140)	(151)
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease)	0	29
Cross Currency Interest Rate Contract [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Earnings	0	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	0
Included in regulatory (assets) liabilities	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Settlements	0
Fair Value, Net Derivative Liability Measured on Recurring Basis, Unobservable Inputs Reconciliation, Transfers into Level 3	11
Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Liability, Transfers out of Level 3	0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs	(11)	0	$ 0
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Period Increase (Decrease)	0
Other comprehensive income - Derivative activity [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	114	8
Other comprehensive income - Derivative activity [Member] | Commodity Contract [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	0	0
Other comprehensive income - Derivative activity [Member] | Foreign Exchange Contract [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	(17)	0
Other comprehensive income - Derivative activity [Member] | Interest Rate Contract
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)	$ (97)	(8)
Other comprehensive income - Derivative activity [Member] | Cross Currency Interest Rate Contract [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Inputs Reconciliation, Gain (Loss) Included in Other Comprehensive Income (Loss)		$ 0
Argentina, Pesos | Minimum [Member] | Foreign Exchange Contract [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Derivative, Forward Exchange Rate	0.61
Argentina, Pesos | Maximum [Member] | Foreign Exchange Contract [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Derivative, Forward Exchange Rate	4.95
Argentina, Pesos | Weighted Average [Member] | Foreign Exchange Contract [Member]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis, Unobservable Input Reconciliation [Roll Forward]
Derivative, Forward Exchange Rate	2.5

Fair Value (Quantitative Inform

Fair Value (Quantitative Information) (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Fair Value Inputs Quantitative Information [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs		$ (102)	$ 63	$ 93
Foreign Exchange Contract [Member]
Fair Value Inputs Quantitative Information [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs		94	199	240
Interest Rate Contract
Fair Value Inputs Quantitative Information [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs		(184)	(140)	(151)
Cross Currency Interest Rate Contract [Member]
Fair Value Inputs Quantitative Information [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs		(11)	0	0
Commodity Contract [Member]
Fair Value Inputs Quantitative Information [Line Items]
Fair Value, Net Derivative Asset (Liability) Measured on Recurring Basis with Unobservable Inputs		$ (1)	$ 4	$ 4
Measurement Input, Entity Credit Risk [Member] | Interest Rate Contract | Minimum
Fair Value Inputs Quantitative Information [Line Items]
Fair Value Measurement Inputs, Nonrecurring	0.80%
Measurement Input, Entity Credit Risk [Member] | Interest Rate Contract | Maximum
Fair Value Inputs Quantitative Information [Line Items]
Fair Value Measurement Inputs, Nonrecurring	4.94%
Measurement Input, Entity Credit Risk [Member] | Interest Rate Contract | Weighted Average
Fair Value Inputs Quantitative Information [Line Items]
Fair Value Measurement Inputs, Nonrecurring	3.70%
Measurement Input, Entity Credit Risk [Member] | Cross Currency Interest Rate Contract [Member] | Weighted Average
Fair Value Inputs Quantitative Information [Line Items]
Fair Value Measurement Inputs, Nonrecurring	2.10%

Fair Value (Nonrecurring Measur

Fair Value (Nonrecurring Measurements) (Details) - USD ($)		3 Months Ended					12 Months Ended
		Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Oct. 01, 2018
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Other Asset Impairment Charges		$ 69,000,000	$ 116,000,000	$ 42,000,000	$ 74,000,000	$ 92,000,000	$ 185,000,000	$ 208,000,000	$ 537,000,000
Other non-operating expense							92,000,000	147,000,000	0
Discontinued Operation, Gain (Loss) from Disposal of Discontinued Operation, before Income Tax									$ (611,000,000)
Shady Point [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring				30,000,000				30,000,000
Nejapa [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring				5,000,000				5,000,000
Guacolda Affiliate [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Equity Method Investment, Other than Temporary Impairment								144,000,000
Kilroot and Ballylumford [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring		114,000,000					114,000,000
OPGC Affiliate [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Equity Method Investment, Other than Temporary Impairment		92,000,000
Estimate of Fair Value Measurement [Member] | Level 3
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring		315,000,000					315,000,000
Equity Method Investments [Member] | Elsta [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Other Asset Impairment Charges								3,000,000
Equity Method Investments [Member] | Estimate of Fair Value Measurement [Member] | Elsta [Member] | Level 1
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring					0
Equity Method Investments [Member] | Estimate of Fair Value Measurement [Member] | Elsta [Member] | Level 2
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring					16,000,000
Equity Method Investments [Member] | Estimate of Fair Value Measurement [Member] | Elsta [Member] | Level 3
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring					0
Equity Method Investments [Member] | Reported Value Measurement [Member] | Elsta [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring	[1]				19,000,000
Equity Method Investments [Member] | Reported Value Measurement [Member] | Guacolda Affiliate [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring	[1]									$ 354,000,000
Long Lived Assets Held And Used [Member] | Shady Point [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Other Asset Impairment Charges	[2]							157,000,000
Long Lived Assets Held And Used [Member] | Nejapa [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Other Asset Impairment Charges	[3]							37,000,000
Long Lived Assets Held And Used [Member] | Kilroot [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring		20,000,000					20,000,000
Long Lived Assets Held And Used [Member] | US Generation Facility [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Other Asset Impairment Charges	[3]						60,000,000
Long Lived Assets Held And Used [Member] | Estimate of Fair Value Measurement [Member] | Nejapa [Member] | Level 1
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring	[3]				0
Long Lived Assets Held And Used [Member] | Estimate of Fair Value Measurement [Member] | Nejapa [Member] | Level 2
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring	[3]				$ 0
Long Lived Assets Held And Used [Member] | Estimate of Fair Value Measurement [Member] | Nejapa [Member] | Level 3
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring	[3]			5,000,000				5,000,000
Long Lived Assets Held And Used [Member] | Reported Value Measurement [Member] | Nejapa [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring	[1],[3]			42,000,000				42,000,000
Long Lived Assets Held For Sale [Member] | Guacolda Affiliate [Member] | Level 1
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring				0				0
Long Lived Assets Held For Sale [Member] | Guacolda Affiliate [Member] | Level 2
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring				0				0
Long Lived Assets Held For Sale [Member] | Guacolda Affiliate [Member] | Level 3
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring				209,000,000				209,000,000
Long Lived Assets Held For Sale [Member] | Kilroot and Ballylumford [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Other Asset Impairment Charges	[2]						115,000,000
Assets Carrying Amount Disclosure Nonrecurring			232,000,000
Long Lived Assets Held For Sale [Member] | OPGC Affiliate [Member] | Level 3
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring		212,000,000					212,000,000
Long Lived Assets Held For Sale [Member] | Estimate of Fair Value Measurement [Member] | Kilroot and Ballylumford [Member] | Level 1
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring	[2]		0
Long Lived Assets Held For Sale [Member] | Estimate of Fair Value Measurement [Member] | Kilroot and Ballylumford [Member] | Level 2
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring	[2]		118,000,000
Long Lived Assets Held For Sale [Member] | Estimate of Fair Value Measurement [Member] | Kilroot and Ballylumford [Member] | Level 3
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring	[2]		$ 0
Long Lived Assets Held For Sale [Member] | Estimate of Fair Value Measurement [Member] | OPGC Affiliate [Member] | Level 1
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring		0					0
Long Lived Assets Held For Sale [Member] | Estimate of Fair Value Measurement [Member] | OPGC Affiliate [Member] | Level 2
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring		0					0
Long Lived Assets Held For Sale [Member] | Reported Value Measurement [Member] | OPGC Affiliate [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring	[1]	304,000,000					304,000,000
Fair Value, Nonrecurring [Member] | Long Lived Assets Held And Used [Member] | Estimate of Fair Value Measurement [Member] | Shady Point [Member] | Level 1
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring	[2]			0				0
Fair Value, Nonrecurring [Member] | Long Lived Assets Held And Used [Member] | Estimate of Fair Value Measurement [Member] | Shady Point [Member] | Level 2
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring	[2]	0					0
Fair Value, Nonrecurring [Member] | Long Lived Assets Held And Used [Member] | Estimate of Fair Value Measurement [Member] | Shady Point [Member] | Level 3
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring	[2]	30,000,000					30,000,000
Fair Value, Nonrecurring [Member] | Long Lived Assets Held And Used [Member] | Estimate of Fair Value Measurement [Member] | US Generation Facility [Member] | Level 1
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring	[3]	0					0
Fair Value, Nonrecurring [Member] | Long Lived Assets Held And Used [Member] | Estimate of Fair Value Measurement [Member] | US Generation Facility [Member] | Level 2
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring	[3]	0					0
Fair Value, Nonrecurring [Member] | Long Lived Assets Held And Used [Member] | Estimate of Fair Value Measurement [Member] | US Generation Facility [Member] | Level 3
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring	[3]	103,000,000					103,000,000
Fair Value, Nonrecurring [Member] | Long Lived Assets Held And Used [Member] | Reported Value Measurement [Member] | Shady Point [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring	[1],[2]			$ 211,000,000				$ 211,000,000
Fair Value, Nonrecurring [Member] | Long Lived Assets Held And Used [Member] | Reported Value Measurement [Member] | US Generation Facility [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring	[1],[3]	$ 163,000,000					$ 163,000,000
[1]	Represents the carrying values at the dates of initial measurement, before fair value adjustment.
[2]	Per the Company's policy, pre-tax loss is limited to the impairment of long-lived assets. Any additional loss will be recognized on completion of the sale. See Note 22 — Asset Impairment Expense and Note 25 — Held-for-Sale and Dispositions for further information.
[3]	See Note 22 — Asset Impairment Expense for further information.

Fair Value (Nonrecurring Unobse

Fair Value (Nonrecurring Unobservable Inputs) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Assets Liabilities Value		$ (102)
Laurel Mountain [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring			$ 30
Kilroot [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring			5
Fair Value | Level 3
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring		315
Long Lived Assets Held For Sale [Member] | Level 3 | OPGC Affiliate [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring		212
Long Lived Assets Held And Used [Member] | Hawaii Subsidiary [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring		103
Long Lived Assets Held And Used [Member] | Level 3 | Hawaii Subsidiary [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring		$ 103
Long Lived Assets Held And Used [Member] | Fair Value | Level 3 | Kilroot [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Assets Carrying Amount Disclosure Nonrecurring	[1]		$ 5
Measurement Input, Long-term Revenue Growth Rate [Member] | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Minimum | Hawaii Subsidiary [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Fair Value Measurement Inputs, Nonrecurring		(11.00%)
Measurement Input, Long-term Revenue Growth Rate [Member] | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Minimum | OPGC Affiliate [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Fair Value Measurement Inputs, Nonrecurring		(27.00%)
Measurement Input, Long-term Revenue Growth Rate [Member] | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Maximum | Hawaii Subsidiary [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Fair Value Measurement Inputs, Nonrecurring		1.00%
Measurement Input, Long-term Revenue Growth Rate [Member] | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Maximum | OPGC Affiliate [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Fair Value Measurement Inputs, Nonrecurring		41.00%
Measurement Input, Long-term Revenue Growth Rate [Member] | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Weighted Average | Hawaii Subsidiary [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Fair Value Measurement Inputs, Nonrecurring		(6.00%)
Measurement Input, Long-term Revenue Growth Rate [Member] | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Weighted Average | OPGC Affiliate [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Fair Value Measurement Inputs, Nonrecurring		2.00%
Measurement Input, Operating Margin [Member] | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Minimum | Hawaii Subsidiary [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Fair Value Measurement Inputs, Nonrecurring		5.00%
Measurement Input, Operating Margin [Member] | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Minimum | OPGC Affiliate [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Fair Value Measurement Inputs, Nonrecurring		0.00%
Measurement Input, Operating Margin [Member] | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Maximum | Hawaii Subsidiary [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Fair Value Measurement Inputs, Nonrecurring		35.00%
Measurement Input, Operating Margin [Member] | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Maximum | OPGC Affiliate [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Fair Value Measurement Inputs, Nonrecurring		0.00%
Measurement Input, Operating Margin [Member] | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Weighted Average | Hawaii Subsidiary [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Fair Value Measurement Inputs, Nonrecurring		29.00%
Measurement Input, Operating Margin [Member] | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Weighted Average | OPGC Affiliate [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Fair Value Measurement Inputs, Nonrecurring		0.00%
Measurement Input, Discount Rate [Member] | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Minimum | Hawaii Subsidiary [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Fair Value Measurement Inputs, Nonrecurring		5.00%
Measurement Input, Discount Rate [Member] | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Maximum | Hawaii Subsidiary [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Fair Value Measurement Inputs, Nonrecurring		15.00%
Measurement Input, Discount Rate [Member] | Valuation, Income Approach [Member] | Long Lived Assets Held And Used [Member] | Weighted Average | OPGC Affiliate [Member]
Fair Value Assets Measured On Nonrecurring Basis Unobservable Inputs [Line Items]
Fair Value Measurement Inputs, Nonrecurring		9.00%
[1]	See Note 22 — Asset Impairment Expense for further information.

Fair Value (Instruments Not Mea

Fair Value (Instruments Not Measured at Fair Value) (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
ASSETS
Non-Recourse Debt			$ 15,645
Liabilities [Abstract]
Recourse debt		$ 3,396	3,655
Carrying Amount
ASSETS
Accounts receivable - noncurrent	[1]	98	100
Non-Recourse Debt		16,712	15,645
Liabilities [Abstract]
Recourse debt		3,396	3,655
Fair Value
ASSETS
Accounts receivable - noncurrent	[1]	145	209
Non-Recourse Debt		16,579	16,225
Liabilities [Abstract]
Recourse debt		3,529	3,621
Value added tax		11	16
Fair Value | Level 1
ASSETS
Accounts receivable - noncurrent		0	0
Non-Recourse Debt		0	0
Liabilities [Abstract]
Recourse debt		0	0
Fair Value | Level 2
ASSETS
Accounts receivable - noncurrent		0	0
Non-Recourse Debt		15,804	13,524
Liabilities [Abstract]
Recourse debt		3,529	3,621
Fair Value | Level 3
ASSETS
Accounts receivable - noncurrent	[1]	145	209
Non-Recourse Debt		775	2,701
Liabilities [Abstract]
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 Consolidated Balance Sheets. The fair value and carrying amount of the Argentina receivables exclude VAT of $11 million and $16 million as of December 31, 2019 and 2018 , respectively.

Derivative Instruments and He_3

Derivative Instruments and Hedging Activities (Outstanding Derivative Notionals and Terms by Type) (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018
Derivative [Line Items]
Derivative, notional amount	$ 1,800,000,000
Libor and Euribor [Member] | Interest Rate Contract
Derivative [Line Items]
Derivative, notional amount	5,014,000,000
Unidad de Fomento (funds code) | Cross Currency Interest Rate Contract [Member]
Derivative [Line Items]
Derivative, notional amount	260,000,000
Argentina, Pesos | Foreign Exchange Contract [Member]
Derivative [Line Items]
Derivative, notional amount	30,000,000
Chilean Peso CLP [Member] | Foreign Exchange Contract [Member]
Derivative [Line Items]
Derivative, notional amount	163,000,000
Colombian Peso COP [Member] | Foreign Exchange Contract [Member]
Derivative [Line Items]
Derivative, notional amount	139,000,000
Brazil, Brazil Real | Foreign Exchange Contract [Member]
Derivative [Line Items]
Derivative, notional amount	5,000,000
Other unspecified currency [Domain] | Foreign Exchange Contract [Member]
Derivative [Line Items]
Derivative, notional amount	90,000,000
Other Noncurrent Assets [Member]
Derivative [Line Items]
Derivative Asset, Noncurrent	99,000,000	$ 187,000,000
Other Noncurrent Liabilities [Member]
Derivative [Line Items]
Derivative Liability, Noncurrent	298,000,000	$ 206,000,000
Natural Gas and Natural Gas Liquids [Member]
Derivative [Line Items]
Commodity Contract Asset, Current	71,000,000
Energy [Domain]
Derivative [Line Items]
Commodity Contract Asset, Current	1,000,000
Coal [Member]
Derivative [Line Items]
Commodity Contract Asset, Current	$ 10,000,000

Derivative Instruments and He_4

Derivative Instruments and Hedging Activities (Assets and LIabilities - Designated vs. Not Designated Hedging Instruments) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Total asset derivatives	$ 171	$ 262
Total liability derivatives	424	257
Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total asset derivatives	62	35
Total liability derivatives	368	238
Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total asset derivatives	109	227
Total liability derivatives	56	19
Interest Rate Contract
Derivatives, Fair Value [Line Items]
Total asset derivatives	31	29
Total liability derivatives	328	208
Interest Rate Contract | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total asset derivatives	31	29
Total liability derivatives	323	205
Interest Rate Contract | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total asset derivatives	0	0
Total liability derivatives	5	3
Cross Currency Interest Rate Contract [Member]
Derivatives, Fair Value [Line Items]
Total asset derivatives	0	6
Total liability derivatives	21	5
Cross Currency Interest Rate Contract [Member] | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total asset derivatives	0	6
Total liability derivatives	21	5
Cross Currency Interest Rate Contract [Member] | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total asset derivatives	0	0
Total liability derivatives	0	0
Foreign Exchange Contract [Member]
Derivatives, Fair Value [Line Items]
Total asset derivatives	110	217
Total liability derivatives	44	41
Foreign Exchange Contract [Member] | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total asset derivatives	31	0
Total liability derivatives	22	28
Foreign Exchange Contract [Member] | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total asset derivatives	79	217
Total liability derivatives	22	13
Commodity Contract [Member]
Derivatives, Fair Value [Line Items]
Total asset derivatives	30	10
Total liability derivatives	31	3
Commodity Contract [Member] | Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total asset derivatives	0	0
Total liability derivatives	2	0
Commodity Contract [Member] | Not Designated as Hedging Instrument
Derivatives, Fair Value [Line Items]
Total asset derivatives	30	10
Total liability derivatives	29	3
Other Noncurrent Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Noncurrent	99	187
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Current	$ 72	$ 75

Derivative Instruments and He_5

Derivative Instruments and Hedging Activities (Assets and Liabilities - Current vs. Noncurrent Derivative instruments) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Derivatives, Fair Value [Line Items]
Total asset derivatives	$ 171	$ 262
Total liability derivatives	424	257
Other Current Liabilities [Member]
Derivatives, Fair Value [Line Items]
Derivative Liability, Current	126	51
Other Current Assets [Member]
Derivatives, Fair Value [Line Items]
Derivative Asset, Current	$ 72	$ 75

Derivative Instruments and He_6

Derivative Instruments and Hedging Activities Derivative Instruments and Hedging Activities (Effective Portion of Cash Flow Hedges) (Details) - Cash Flow Hedging - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019		Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Losses) Recognized in AOCL, Effective Portion	$ (339)		$ (94)	$ (22)
Gains (Losses) Reclassified from AOCL into Earnings, Effective Portion	(54)		(117)	(51)
Gain (Loss) on Derivative Instruments, Net, Pretax	(52)		173	15
Interest Rate Contract
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Losses) Recognized in AOCL, Effective Portion	(290)		(16)	(66)
Gains (Losses) Reclassified from AOCL into Earnings, Effective Portion	(28)		(52)	(82)
Derivative Instruments, Gain (Loss) Recognized in Income, Ineffective Portion and Amount Excluded from Effectiveness Testing, Net	0		(7)	3
AOCI before tax expected increase (decrease) next 12 months	(73)
Loss on discontinuation of cash flow hedge due to forecasted transaction probable of not occurring	(2)	[1]	0	(13)	[1]
Cross Currency Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Losses) Recognized in AOCL, Effective Portion	(26)		(26)	31
Gains (Losses) Reclassified from AOCL into Earnings, Effective Portion	(12)		(43)	34
Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Losses) Recognized in AOCL, Effective Portion	(23)		(52)	(5)
Gains (Losses) Reclassified from AOCL into Earnings, Effective Portion	(13)		(16)	(20)
Gain (Loss) on Derivative Instruments, Net, Pretax	(46)		148	1
Commodity Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Gain (Losses) Recognized in AOCL, Effective Portion	0		0	18
Gains (Losses) Reclassified from AOCL into Earnings, Effective Portion	(1)		(6)	17
Gain (Loss) on Derivative Instruments, Net, Pretax	$ (6)		$ 25	$ 14
[1]	Cash flow hedge was discontinued on a cross-currency swap in 2019 because the underlying debt was prepaid. Cash flow hedge was discontinued in 2017 because it was probable the forecasted transaction will not occur.

Derivative Instruments and He_7

Derivative Instruments and Hedging Activities Derivative Instruments and Hedging Activities (Ineffective Portion of Cash Flow Hedges) (Details) - Cash Flow Hedging - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ (54)	$ (117)	$ (51)
Interest Rate Contract
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	(28)	(52)	(82)
Gain (Losses) Recognized in Earnings, Ineffective Portion	0	(7)	3
Accumulated Other Comprehensive Income Loss Before Tax Expected Increase Decrease Next Twelve Months	73
Foreign Exchange Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	(13)	(16)	(20)
Cross Currency Interest Rate Contract [Member]
Derivative Instruments, Gain (Loss) [Line Items]
Derivative Instruments, Gain (Loss) Reclassified from Accumulated OCI into Income, Effective Portion, Net	$ (12)	$ (43)	$ 34

Financing Receivables (Details)

Financing Receivables (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)agreement	Dec. 31, 2018USD ($)
Schedule of Financing Receivables [Line Items]
Financing receivable	$ 109	$ 116
Number of Foninvemem Agreements | agreement	3
Foninvemem Agreement, collection period	10 years
ARGENTINA
Schedule of Financing Receivables [Line Items]
Financing receivable	$ 64	93
Derivative Assets, Gross	94	199
Gener Subsidiary [Member]
Schedule of Financing Receivables [Line Items]
Financing receivable	33	0
Other Entity [Member]
Schedule of Financing Receivables [Line Items]
Financing receivable	$ 12	$ 23

Investments In and Advances T_3

Investments In and Advances To Affiliates - Effective Equity Ownership Interest and Carrying Values (Details) - USD ($)		Apr. 09, 2018	Dec. 31, 2019	Dec. 31, 2018	Apr. 18, 2019	Mar. 31, 2019	Dec. 31, 2017
Investments in and Advances to Affiliates [Line Items]
Investments in and advances to affiliates			$ 966,000,000	$ 1,114,000,000			$ 1,197,000,000
sPower [Member]
Investments in and Advances to Affiliates [Line Items]
Investments in and advances to affiliates			$ 442,000,000	$ 515,000,000
Equity Method Investment, Ownership Percentage			50.00%	50.00%	26.00%	50.00%
Gener Subsidiary [Member]
Investments in and Advances to Affiliates [Line Items]
Noncontrolling Interest, Ownership Percentage by Parent			67.00%
Barry
Investments in and Advances to Affiliates [Line Items]
Investments in and advances to affiliates	[1]		$ 0	$ 0
Equity Method Investment, Ownership Percentage	[1]		100.00%	100.00%
Other Long-term Debt			$ 44,000,000	$ 43,000,000
Simple Energy [Member]
Investments in and Advances to Affiliates [Line Items]
Investments in and advances to affiliates	[2]		$ 91,000,000	$ 33,000,000
Equity Method Investment, Ownership Percentage	[2]		32.00%	63.00%
Payments to Acquire Businesses, Net of Cash Acquired		$ 35,000,000
Eolica Mesa La Paz [Member]
Investments in and Advances to Affiliates [Line Items]
Investments in and advances to affiliates	[3]		$ 66,000,000	$ 8,000,000
Equity Method Investment, Ownership Percentage	[3]		50.00%	50.00%
Gas Natural del Este [Member]
Investments in and Advances to Affiliates [Line Items]
Investments in and advances to affiliates	[2]		$ 48,000,000	$ 0
Equity Method Investment, Ownership Percentage	[2]		43.00%	0.00%
Distributed Energy [Member]
Investments in and Advances to Affiliates [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired				$ 23,000,000
Guacolda Affiliate [Member]
Investments in and Advances to Affiliates [Line Items]
Investments in and advances to affiliates	[4]		$ 74,000,000	$ 209,000,000
Equity Method Investment, Ownership Percentage	[4]		33.00%	33.00%
Equity Method Investment, Other than Temporary Impairment				$ 144,000,000
Guacolda Affiliate [Member] | Gener Subsidiary [Member]
Investments in and Advances to Affiliates [Line Items]
Equity Method Investment, Ownership Percentage			50.00%
OPGC Affiliate [Member]
Investments in and Advances to Affiliates [Line Items]
Investments in and advances to affiliates			$ 212,000,000	$ 293,000,000
Equity Method Investment, Ownership Percentage			49.00%	49.00%
Equity Method Investment, Other than Temporary Impairment			$ 92,000,000
Other Affiliates [Member]
Investments in and Advances to Affiliates [Line Items]
Investments in and advances to affiliates	[5]		$ 33,000,000	$ 56,000,000
[1]	Represents a VIE in which the Company holds a variable interest, but is not the primary beneficiary.
[2]	Simple Energy merged with Tendril on July 1, 2019 to form Uplight. Prior year information reported relates to Simple Energy.
[3]	The Eólica Mesa La Paz project received funding throughout 2019 and began operations during December 2019.
[4]	The Company's ownership in Guacolda is held through AES Gener, a 67% -owned consolidated subsidiary. AES Gener owns 50% of Guacolda, resulting in an AES effective ownership in Guacolda of 33% .
[5]	Includes Bosforo, Fluence, Distributed Energy equity method investments, and others.

Investments In and Advances T_4

Investments In and Advances To Affiliates - Summary of Financial Information of Affiliates & Subsidiaries (Details) - USD ($)		Apr. 18, 2019	Apr. 09, 2018	Jan. 01, 2018	Sep. 30, 2019	Jul. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jul. 01, 2019	Mar. 31, 2019
Investments in and Advances to Affiliates [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax				$ (1,857,000,000)			$ (2,229,000,000)	$ (2,071,000,000)					$ (2,229,000,000)	$ (2,071,000,000)	$ (1,876,000,000)
Investments in and advances to affiliates							966,000,000	1,114,000,000					966,000,000	1,114,000,000	1,197,000,000
Gain (Loss) on Disposition of Business								$ 128,000,000	$ (21,000,000)	$ 89,000,000	$ 788,000,000		28,000,000	984,000,000	(52,000,000)
Gain (Loss) on Disposition of Property Plant Equipment					$ 2,000,000
Payments to Acquire Businesses and Interest in Affiliates													192,000,000	66,000,000	609,000,000
Proceeds from the sale of business interests, net of cash and restricted cash sold													178,000,000	2,020,000,000	108,000,000
Equity Method Investments																$ 98,000,000
Net equity in earnings (losses) of affiliates							$ (175,000,000)						$ (172,000,000)	$ 39,000,000	71,000,000
Guacolda Affiliate [Member]
Investments in and Advances to Affiliates [Line Items]
Equity Method Investment, Ownership Percentage	[1]						33.00%	33.00%					33.00%	33.00%
Investments in and advances to affiliates	[1]						$ 74,000,000	$ 209,000,000					$ 74,000,000	$ 209,000,000
Impaired Long-Lived Assets Held and Used, Facts and Circumstances Leading to Impairment													$ 158,000,000
Equity Method Investment, Other than Temporary Impairment														$ 144,000,000
Gas Natural del Este [Member]
Investments in and Advances to Affiliates [Line Items]
Equity Method Investment, Ownership Percentage	[2]						43.00%	0.00%					43.00%	0.00%
Investments in and advances to affiliates	[2]						$ 48,000,000	$ 0					$ 48,000,000	$ 0
Noncash or Part Noncash Divestiture, Amount of Consideration Received					$ 55,000,000
Distributed Energy [Member]
Investments in and Advances to Affiliates [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired														23,000,000
Business Combination, Equity Interest in Acquiree, Remeasurement Gain (Loss)								$ (5,000,000)						$ 5,000,000
Simple Energy [Member]
Investments in and Advances to Affiliates [Line Items]
Equity Method Investment, Ownership Percentage	[2]						32.00%	63.00%					32.00%	63.00%
Payments to Acquire Businesses, Net of Cash Acquired			$ 35,000,000
Investments in and advances to affiliates	[2]						$ 91,000,000	$ 33,000,000					$ 91,000,000	$ 33,000,000
Business Combination, Consideration Transferred						$ 53,000,000
Equity Method Investment, Realized Gain (Loss) on Disposal						$ 12,000,000
Fluence [Member]
Investments in and Advances to Affiliates [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired				50.00%
Payments to Acquire Interest in Joint Venture				$ 7,000,000
Business Combination, Consideration Transferred				50,000,000
sPower [Member]
Investments in and Advances to Affiliates [Line Items]
Equity Method Investment, Ownership Percentage		26.00%					50.00%	50.00%					50.00%	50.00%			50.00%
Investments in and advances to affiliates							$ 442,000,000	$ 515,000,000					$ 442,000,000	$ 515,000,000
Gain (Loss) on Disposition of Business		$ 28,000,000
Equity Method Investment, Ownership Percentage Sold		48.00%
Equity Method Investment, Net Sales Proceeds		$ 173,000,000
Reinvestment of Proceeds from Sale of Equity Method Investments												$ 58,000,000	$ 58,000,000	$ 0	0
Barry
Investments in and Advances to Affiliates [Line Items]
Equity Method Investment, Ownership Percentage	[3]						100.00%	100.00%					100.00%	100.00%
Other Long-term Debt							$ 44,000,000	$ 43,000,000					$ 44,000,000	$ 43,000,000
Investments in and advances to affiliates	[3]						$ 0	0					0	0
Non-cash [Member] | Fluence [Member]
Investments in and Advances to Affiliates [Line Items]
Contribution of Property				$ 20,000,000									$ 61,000,000	20,000,000	$ 0
Fair Value, Inputs, Level 3 [Member] | Long Lived Assets Held For Sale [Member] | Guacolda Affiliate [Member]
Investments in and Advances to Affiliates [Line Items]
Assets Carrying Amount Disclosure Nonrecurring								$ 209,000,000						$ 209,000,000
[1]	The Company's ownership in Guacolda is held through AES Gener, a 67% -owned consolidated subsidiary. AES Gener owns 50% of Guacolda, resulting in an AES effective ownership in Guacolda of 33% .
[2]	Simple Energy merged with Tendril on July 1, 2019 to form Uplight. Prior year information reported relates to Simple Energy.
[3]	Represents a VIE in which the Company holds a variable interest, but is not the primary beneficiary.

Investments In and Advances T_5

Investments In and Advances To Affiliates - Summarized Financial Information (Details) - USD ($) $ in Millions	1 Months Ended	3 Months Ended								12 Months Ended
	Sep. 30, 2019	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jan. 01, 2018
Schedule of Equity Method Investments [Line Items]
Revenue		$ 2,431	$ 2,625	$ 2,483	$ 2,650	$ 2,622	$ 2,837	$ 2,537	$ 2,740	$ 10,189	$ 10,736	$ 10,530
Operating margin		560	701	502	586	646	671	600	656	2,349	2,573	2,465
Net income (loss)		(120)	$ 298	$ 67	$ 233	181	$ 191	$ 416	$ 777	478	1,565	(777)
Assets, Current		5,231				5,015				5,231	5,015
Liabilities, Current		5,096				4,399				5,096	4,399
Liabilities, Noncurrent		22,435				21,639				22,435	21,639
Stockholders' Equity Attributable to Noncontrolling Interest		2,233				2,396				2,233	2,396	2,380	$ 2,461
Stockholders' Equity Attributable to Parent		2,996				3,208				2,996	3,208
Undistributed Earnings Of Minority Owned Affiliates Included In Retained Earnings		14								14
Distributions Received From Minority Owned Affiliates										23	83	69
Basis Difference Between Carrying Amount And Investment		225								225
Minority Owned Affiliates
Schedule of Equity Method Investments [Line Items]
Revenue										1,122	962	762
Operating margin										124	135	165
Net income (loss)										(724)	14	72
Assets, Current		831				558				831	558
Assets, Noncurrent		7,220				5,918				7,220	5,918
Liabilities, Current		1,271				546				1,271	546
Liabilities, Noncurrent		3,966				3,309				3,966	3,309
Stockholders' Equity Attributable to Parent		2,814				2,622				2,814	2,622
Majority Owned Affiliates
Schedule of Equity Method Investments [Line Items]
Revenue										49	40	16
Operating margin										(5)	3	5
Net income (loss)										(7)	(3)	$ (15)
Assets, Current		166				89				166	89
Assets, Noncurrent		982				41				982	41
Liabilities, Current		141				35				141	35
Liabilities, Noncurrent		1,052				122				1,052	122
Stockholders' Equity Attributable to Parent		(45)				$ (27)				(45)	$ (27)
Gas Natural del Este [Member]
Schedule of Equity Method Investments [Line Items]
Noncash or Part Noncash Divestiture, Amount of Consideration Received	$ 55
Fair Value, Inputs, Level 3 [Member] | Long Lived Assets Held For Sale [Member] | OPGC Affiliate [Member]
Schedule of Equity Method Investments [Line Items]
Assets Carrying Amount Disclosure Nonrecurring		$ 212								$ 212

Total Other Non-Operating Expen

Total Other Non-Operating Expense (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Jul. 01, 2019
Schedule of Other Nonoperating Income (Expense) [Line Items]
Other Nonoperating Expense	$ (92)	$ (147)	$ 0
Equity Method Investments				$ 98

Goodwill and Other Intangible_3

Goodwill and Other Intangible Assets (Goodwill Roll Forward) (Details) - USD ($) $ in Millions	Dec. 31, 2019		Dec. 31, 2018
Goodwill [Roll Forward]
Goodwill	$ 3,670		$ 3,792
Accumulated impairment losses	(2,611)		(2,733)
Net balance	1,059		1,059
Kilroot [Member]
Goodwill [Roll Forward]
Goodwill	122
Accumulated impairment losses	(122)
Operating Segments [Member] | UNITED STATES
Goodwill [Roll Forward]
Goodwill	2,786		2,786
Accumulated impairment losses	(2,611)		(2,611)
Net balance	175		175
Operating Segments [Member] | ANDES [Member]
Goodwill [Roll Forward]
Goodwill	868		868
Accumulated impairment losses	0		0
Net balance	868		868
Operating Segments [Member] | MCAC [Member]
Goodwill [Roll Forward]
Goodwill	16		16
Accumulated impairment losses	0		0
Net balance	16		16
Operating Segments [Member] | EURASIA [Member]
Goodwill [Roll Forward]
Goodwill	0	[1]	122
Accumulated impairment losses	0	[1]	(122)
Net balance	$ 0		$ 0
[1]	Goodwill and accumulated impairment losses at the Eurasia reportable segment were reduced by $122 million due to the sale of Kilroot in 2019 .

Goodwill and Other Intangible_4

Goodwill and Other Intangible Assets (Intangible Assets) (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Finite-Lived Intangible Assets, Net [Abstract]
Gross Balance		$ 707	$ 847
Accumulated Amortization		(307)	(457)
Net Balance		400	390
Indefinite-lived Intangible Assets (Excluding Goodwill)		69	46
Indefinite- lived intangible assets, Amortization		0	0
Intangible Assets, Gross		776	893
Intangible Assets, Net		469	436
Land Use Rights [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Indefinite-lived Intangible Assets (Excluding Goodwill)		21	21
Indefinite- lived intangible assets, Amortization		0	0
Water rights
Finite-Lived Intangible Assets, Net [Abstract]
Indefinite-lived Intangible Assets (Excluding Goodwill)		20	20
Indefinite- lived intangible assets, Amortization		0	0
Transmission Rights [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Indefinite-lived Intangible Assets (Excluding Goodwill)		23	0
Indefinite- lived intangible assets, Amortization		0	0
Other
Finite-Lived Intangible Assets, Net [Abstract]
Indefinite-lived Intangible Assets (Excluding Goodwill)		5	5
Indefinite- lived intangible assets, Amortization		0	0
Computer Software, Intangible Asset [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Gross Balance		367	467
Accumulated Amortization		(228)	(344)
Net Balance		139	123
Contractual payment rights
Finite-Lived Intangible Assets, Net [Abstract]
Gross Balance		0	57
Accumulated Amortization		0	(44)
Net Balance	[1]	0	13
Emission allowances [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Gross Balance		24	15
Accumulated Amortization		0	0
Net Balance	[2]	24	15
Project Development Rights [Member]
Finite-Lived Intangible Assets, Net [Abstract]
Gross Balance		100	93
Accumulated Amortization		(1)	(1)
Net Balance		99	92
Contracts
Finite-Lived Intangible Assets, Net [Abstract]
Gross Balance		134	137
Accumulated Amortization		(29)	(24)
Net Balance		105	113
Other
Finite-Lived Intangible Assets, Net [Abstract]
Gross Balance		82	78
Accumulated Amortization		(49)	(44)
Net Balance	[3]	$ 33	$ 34
[1]	Represent legal rights to receive system reliability payments from the regulator.
[2]	Acquired or purchased emissions allowances are finite-lived intangible assets that are expensed when utilized and included in net income for the year.
[3]	Includes management rights, sales concessions, renewable energy credits and incentives, and other individually insignificant intangible assets.

Goodwill and Other Intangible_5

Goodwill and Other Intangible Assets (Intangible Assets Acquired) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Indefinite-lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 121	$ 179
Computer Software, Intangible Asset [Member]
Indefinite-lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 61	$ 67
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	5 years	6 years
Other Intangible Assets [Member]
Indefinite-lived Intangible Assets [Line Items]
Other intangible assets acquired	$ 5	$ 11
Contracts
Indefinite-lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 2	$ 50
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	35 years	24 years
Project Development Rights [Member]
Indefinite-lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 8	$ 35
Acquired Finite-lived Intangible Assets, Weighted Average Useful Life	29 years	23 years
Emission allowances [Member]
Indefinite-lived Intangible Assets [Line Items]
Finite-lived Intangible Assets Acquired	$ 22	$ 16
Transmission Rights [Member]
Indefinite-lived Intangible Assets [Line Items]
Indefinite-lived Intangible Assets Acquired	$ 23

Goodwill and Other Intangible_6

Goodwill and Other Intangible Assets (Expected Amortization Expense) (Details) $ in Millions	Dec. 31, 2019USD ($)
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2020	$ 44
2021	40
2022	31
2023	26
2024	24
Computer Software, Intangible Asset [Member]
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2020	34
2021	31
2022	22
2023	17
2024	15
Contract-Based Intangible Assets [Member]
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2020	4
2021	4
2022	4
2023	4
2024	4
Other
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
2020	6
2021	5
2022	5
2023	5
2024	$ 5

Goodwill and Other Intangible_7

Goodwill and Other Intangible Assets (Narrative) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Goodwill [Line Items]
Amortization of Intangible Assets	$ 45	$ 47	$ 34
Goodwill	1,059	1,059
Goodwill	$ 3,670	$ 3,792

Goodwill and Other Intangible_8

Goodwill and Other Intangible Assets Schedule of Finite-Lived Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Finite-Lived Intangible Assets [Line Items]
Amortization of Intangible Assets	$ 45	$ 47	$ 34

Regulatory Assets and Liabili_3

Regulatory Assets and Liabilities (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018
Schedule of Regulatory Assets and Liabilities [Line Items]
Total Current Regulatory Assets		$ 113	$ 156
Total Non Current Regulatory Assets		$ 530	547
Remaining Amounts of Regulatory Assets for which No Return on Investment During Recovery Period is Provided		9 years
Total regulatory assets		$ 643	703
Total Current Regulatory Liabilities		$ 81	86
Remaining Recovery Period of Regulatory Liabilities		1 year
Total Non Current Regulatory Liabilities		$ 1,090	1,146
Total regulatory liabilities		1,171	1,232
Overcollection of Costs [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Total Current Regulatory Liabilities		80	83
Deferred Income Tax Charge [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Total Non Current Regulatory Liabilities		209	246
Asset Retirement Obligation Costs
Schedule of Regulatory Assets and Liabilities [Line Items]
Total Non Current Regulatory Liabilities		863	847
Other Regulatory Liabilities
Schedule of Regulatory Assets and Liabilities [Line Items]
Total Current Regulatory Liabilities		1	3
Total Non Current Regulatory Liabilities		18	53
El Salvador Tariff Recoveries
Schedule of Regulatory Assets and Liabilities [Line Items]
Total Current Regulatory Assets		56	87
Pension Costs
Schedule of Regulatory Assets and Liabilities [Line Items]
Total Non Current Regulatory Assets	[1]	262	283
Deferred Midwest Independent Service Operator Costs
Schedule of Regulatory Assets and Liabilities [Line Items]
Total Non Current Regulatory Assets		75	88
Environmental Restoration Costs [Member]
Schedule of Regulatory Assets and Liabilities [Line Items]
Total Non Current Regulatory Assets		85	89
Other Regulatory Assets
Schedule of Regulatory Assets and Liabilities [Line Items]
Total Current Regulatory Assets		57	69
Total Non Current Regulatory Assets		$ 108	$ 87
[1]	Past expenditures on which the Company earns a rate of return .

Regulatory Assets and Liabili_4

Regulatory Assets and Liabilities Regulatory Assets and Liabilities - by Reportable Segment (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Schedule of Regulatory Assets and Liabilities [Line Items]
Regulatory Assets	$ 643	$ 703
Regulatory Liabilities	$ 1,171	$ 1,232

Debt (Non-Recourse Debt Carryin

Debt (Non-Recourse Debt Carrying Amounts and Terms) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Construction Line Of Credit Facility Remaining Borrowing Capacity		$ 470
Gain (Loss) on Extinguishment of Debt		(169)	$ (188)	$ (68)
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net		(318)	(368)
Non-recourse Debt, excluding Finance Lease Liabilities		16,712
Non-Recourse Debt			15,645
Non-recourse Debt Current Maturities	[1]	(1,865)
Non-Recourse Debt, Current Balance	[1]		1,659
Non-recourse Debt, excluding Finance Lease Liabilities, Noncurrent	[1]	14,847
Derivative, notional amount		1,800
Other Line Of Credit Facility Remaining Borrowing Capacity		$ 1,100
Non-Recourse Debt, Noncurrent Balance	[1]		13,986
Variable Rate Debt | Bank loans
Debt Instrument [Line Items]
Weighted Average Interest Rate		4.25%
Non-Recourse Debt		$ 3,389	2,600
Variable Rate Debt | Notes and bonds
Debt Instrument [Line Items]
Weighted Average Interest Rate		3.99%
Non-Recourse Debt		$ 1,056	821
Variable Rate Debt | Debt to (or guaranteed by) multilateral, export credit agencies or development banks
Debt Instrument [Line Items]
Weighted Average Interest Rate	[2]	1.73%
Non-Recourse Debt	[2]	$ 460	3,292
Fixed Rate Debt | Bank loans
Debt Instrument [Line Items]
Weighted Average Interest Rate		5.19%
Non-Recourse Debt		$ 2,900	1,684
Fixed Rate Debt | Notes and bonds
Debt Instrument [Line Items]
Weighted Average Interest Rate		5.51%
Non-Recourse Debt		$ 8,098	7,346
Fixed Rate Debt | Debt to (or guaranteed by) multilateral, export credit agencies or development banks
Debt Instrument [Line Items]
Weighted Average Interest Rate	[2]	6.09%
Non-Recourse Debt	[2]	$ 1,110	246
Fixed Rate Debt | Other
Debt Instrument [Line Items]
Weighted Average Interest Rate		4.20%
Non-Recourse Debt		$ 17	$ 24
[1]	Excludes $3 million (current) and $67 million (noncurrent) finance lease liabilities included in the respective non-recourse debt line items on the Consolidated Balance Sheet as of December 31, 2019 . See Note 14 — Leases for further information.
[2]	Multilateral loans include loans funded and guaranteed by bilaterals, multilaterals, development banks and other similar institutions.

Debt (Non-Recourse Debt Maturit

Debt (Non-Recourse Debt Maturity Schedule) (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Debt Details [Line Items]
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net		$ (318)	$ (368)
Non Recourse Debt Total		16,712
Nonrecourse Debt [Member]
Debt Details [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Year Two		1,648
Long-term Debt, Maturities, Repayments of Principal in Year Three		999
Long-term Debt, Maturities, Repayments of Principal in Year Four		1,125
Long-term Debt, Maturities, Repayments of Principal in Year Five		1,180
Long-term Debt, Maturities, Repayments of Principal after Year Five		10,195
Nonrecourse Debt [Member]
Debt Details [Line Items]
Long-term Debt, Maturities, Repayments of Principal in Next Twelve Months		1,883
AES Southland [Domain] | Nonrecourse Debt [Member]
Debt Details [Line Items]
Debt Instrument, Face Amount	[1]	$ 930
[1]	Issuances relate to the June 2017 long-term non-recourse debt financing to fund the Southland re-powering construction projects, a non-recourse bridge loan in September 2019, and long-term non-recourse debt financing issued in December 2019 to settle the bridge loan.

Debt (Subsidiary Non-Recourse D

Debt (Subsidiary Non-Recourse Debt in Default or Accelerated) (Details) $ in Millions		Dec. 31, 2019USD ($)	Dec. 31, 2018USD ($)
Debt Details [Line Items]
Restricted Cash And Debt Service Reserves		$ 372	$ 627
Debt defaults at risk of causing cross default		0
Debt default amount		$ 325
Restricted Net Assets		1,200
PUERTO RICO | Covenant Violation
Debt Details [Line Items]
Debt default amount		287
Net assets		151
AES llumina [Member] | Covenant Violation
Debt Details [Line Items]
Debt default amount		33
Net assets		19
Jordan [Member] | Covenant Violation
Debt Details [Line Items]
Debt default amount	[1]	5
Net assets	[1]	$ 4
[1]	Classified as current held-for-sale liability on the Consolidated Balance Sheets.

Debt (Non-recourse Debt Narrati

Debt (Non-recourse Debt Narrative) (Details) - USD ($) $ in Millions		3 Months Ended			6 Months Ended	9 Months Ended	12 Months Ended
		Dec. 31, 2019	Mar. 31, 2019	Mar. 31, 2018	Jun. 30, 2019	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Finance Lease, Liability, Current		$ 3					$ 3
Materiality threshold for cash distribution from business to Parent		20.00%					20.00%
Construction line of credit facility remaining borrowing capacity		$ 470					$ 470
Other line of credit remaining borrowing capacity		1,100					1,100
Loss on extinguishment of debt							169	$ 188	$ 68
Restricted cash and debt service reserves		372					372	$ 627
Restricted net assets		1,200					1,200
Finance Lease, Liability, Noncurrent		67					67
Non-Recourse Debt | Gener Subsidiary [Member]
Debt Instrument [Line Items]
Debt face amount		1,000					1,000
Repayments of long-term debt							(697)
Loss on extinguishment of debt							29
Non-Recourse Debt | AES Southland [Domain]
Debt Instrument [Line Items]
Debt face amount	[1]	930					930
Repayments of long-term debt							(210)
Loss on extinguishment of debt							1
Non-Recourse Debt | DPL Subsidiary
Debt Instrument [Line Items]
Debt face amount	[2]				$ 825
Repayments of long-term debt	[2]				(835)
Loss on extinguishment of debt	[2]				43
Non-Recourse Debt | AES Tiete [Domain]
Debt Instrument [Line Items]
Debt face amount					561
Repayments of long-term debt					(533)
Loss on extinguishment of debt					3
Non-Recourse Debt | Cochrane Subsidiary
Debt Instrument [Line Items]
Debt face amount		875					875
Repayments of long-term debt							(833)
Loss on extinguishment of debt							24
Non-Recourse Debt | TEGTEP Mexico Subsidiary [Member]
Debt Instrument [Line Items]
Debt face amount		280					280
Repayments of long-term debt							(248)
Loss on extinguishment of debt							1
Non-Recourse Debt | Mong Duong Subsidiary [Member]
Debt Instrument [Line Items]
Debt face amount	[3]					$ 1,120
Repayments of long-term debt	[3]					(1,081)
Loss on extinguishment of debt	[3]					31
Non-Recourse Debt | Colon [Domain]
Debt Instrument [Line Items]
Debt face amount						610
Repayments of long-term debt						(579)
Loss on extinguishment of debt						28
3.95% Senior Notes due 2049 [Domain] | Senior Notes [Member] | DP&L [Member]
Debt Instrument [Line Items]
Debt face amount					$ 425
Debt Instrument, Interest Rate, Stated Percentage					3.95%
LIBOR 2.25% Senior Notes Due In 2029 [Member] | Senior Notes [Member] | Mong Duong Subsidiary [Member]
Debt Instrument [Line Items]
Debt face amount						$ 1,100
5.125% Senior Notes Due 2027 [Member] | Senior Notes [Member] | Cochrane Subsidiary
Debt Instrument [Line Items]
Debt face amount		$ 430					$ 430
Debt Instrument, Interest Rate, Stated Percentage		5.50%					5.50%
6.25% Senior Secured Facility Agreement due 2034 [Member] | Credit Facility [Domain] | Cochrane Subsidiary
Debt Instrument [Line Items]
Debt face amount		$ 445					$ 445
Debt Instrument, Interest Rate, Stated Percentage		6.25%					6.25%
8.0% Senior Notes Due 2020 [Domain]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount				$ 228
8.0% Senior Notes Due 2020 [Domain] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage				8.00%
4.5% Senior Notes Due 2023 [Domain] [Domain] | Senior Notes [Member]
Debt Instrument [Line Items]
Debt face amount				$ 500
4.5% Senior Notes Due 2023 [Domain] [Domain] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage				4.50%
4.0% Senior Notes Due 2021 [Domain] [Domain] | Senior Notes [Member]
Debt Instrument [Line Items]
Debt face amount				$ 500
4.0% Senior Notes Due 2021 [Domain] [Domain] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage				4.00%
4.41% SPV Loan [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage						4.41%
7.18% SPV Loan [Member] [Member] | Senior Notes [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage						7.18%
LIBOR 4.15% Senior Notes Due In 2029 [Member] [Member] | Senior Notes [Member] | Non-Recourse Debt | Mong Duong Subsidiary [Member]
Debt Instrument [Line Items]
Loss on extinguishment of debt						$ 31
Variable Rate [Domain] | Cochrane Subsidiary
Debt Instrument [Line Items]
Extinguishment of Debt, Amount							$ 833
Variable Rate [Domain] | DP&L [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount					$ 435
Variable Rate [Domain] | Senior Notes [Member]
Debt Instrument [Line Items]
Debt face amount					445
Variable Rate [Domain] | Senior Notes [Member] | Gener Subsidiary [Member]
Debt Instrument [Line Items]
Loss on extinguishment of debt							(29)
Variable Rate [Domain] | Senior Notes [Member] | Cochrane Subsidiary
Debt Instrument [Line Items]
Loss on extinguishment of debt							(24)
7.125% Senior Unsecured Notes due 2079 [Member] | Senior Notes [Member] | Gener Subsidiary [Member]
Debt Instrument [Line Items]
Debt face amount			$ 550
Debt Instrument, Interest Rate, Stated Percentage			7.125%
8.35% Senior Unsecured Notes due 2073 [Member] | Gener Subsidiary [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage			8.375%
Extinguishment of Debt, Amount			$ 450
6.35% Senior Unsecured Notes due 2079 [Member] | Senior Notes [Member] | Gener Subsidiary [Member]
Debt Instrument [Line Items]
Debt face amount		$ 450					$ 450
Debt Instrument, Interest Rate, Stated Percentage		6.35%					6.35%
Senior unsecured notes due 2021 [Member] | Gener Subsidiary [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount		$ 73					$ 119
Senior unsecured notes due 2025 [Member] | Gener Subsidiary [Member]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount		$ 55
4.35% Senior Notes due 2029 [Domain] | Senior Notes [Member]
Debt Instrument [Line Items]
Debt face amount					$ 400
Debt Instrument, Interest Rate, Stated Percentage					4.35%
7.25% Senior Notes due 2021 [Domain]
Debt Instrument [Line Items]
Extinguishment of Debt, Amount					$ 400
7.25% Senior Notes due 2021 [Domain] | Senior Notes [Member]
Debt Instrument [Line Items]
Debt face amount					$ 780
7.25% Senior Notes due 2021 [Domain] | Unsecured Debt [Member]
Debt Instrument [Line Items]
Debt Instrument, Interest Rate, Stated Percentage					7.25%
7.25% Senior Notes due 2021 [Domain] | Unsecured Debt [Member] | Non-Recourse Debt
Debt Instrument [Line Items]
Loss on extinguishment of debt					$ 43
[1]	Issuances relate to the June 2017 long-term non-recourse debt financing to fund the Southland re-powering construction projects, a non-recourse bridge loan in September 2019, and long-term non-recourse debt financing issued in December 2019 to settle the bridge loan.
[2]	Includes transactions at DPL and its subsidiary, DP&L.
[3]	Non-cash transaction via an equity affiliate. See below for further information.

Debt (Recourse Debt Carrying Am

Debt (Recourse Debt Carrying Amount and Terms) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Debt Instrument [Line Items]
Recourse Debt Total	$ 3,396	$ 3,655
Recourse Debt Current	(5)	(5)
Recourse Debt Non Current	$ 3,391	$ 3,650
Revolving Credit Facility [Member] | Recourse Debt | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	1.75%	1.75%
Senior Secured Term Loan due 2022 [Member] | Recourse Debt | LIBOR
Debt Instrument [Line Items]
Basis spread on variable rate	1.75%	1.75%
Unamortized (discount) premium & debt issuance (costs), net
Debt Instrument [Line Items]
Recourse Debt Total	$ (22)
Parent Company [Member]
Debt Instrument [Line Items]
Recourse Debt Total	$ 3,396
Parent Company [Member] | 4.0% Senior Notes Due 2021 [Domain] [Domain] | Recourse Debt
Debt Instrument [Line Items]
Interest Rate	4.00%
Recourse Debt Total	$ 500	$ 500
Parent Company [Member] | Revolving Credit Facility [Member] | Recourse Debt
Debt Instrument [Line Items]
Recourse Debt Total	180	0
Parent Company [Member] | Senior Secured Term Loan due 2022 [Member] | Recourse Debt
Debt Instrument [Line Items]
Recourse Debt Total	$ 18	366
Parent Company [Member] | 4.875% Senior Notes Due 2023 [Member] [Member] | Recourse Debt
Debt Instrument [Line Items]
Interest Rate	4.875%
Recourse Debt Total	$ 613	713
Parent Company [Member] | 4.5% Senior Notes Due 2023 [Domain] [Domain] | Recourse Debt
Debt Instrument [Line Items]
Interest Rate	4.50%
Recourse Debt Total	$ 500	500
Parent Company [Member] | 5.50% Senior Unsecured Note Due 2024 | Recourse Debt
Debt Instrument [Line Items]
Interest Rate	5.50%
Recourse Debt Total	$ 63	63
Parent Company [Member] | 5.50% Unsecured senior notes due 2025 [Domain] | Recourse Debt
Debt Instrument [Line Items]
Interest Rate	5.50%
Recourse Debt Total	$ 544	544
Parent Company [Member] | 6.00% senior notes due 2026 [Domain] | Recourse Debt
Debt Instrument [Line Items]
Interest Rate	6.00%
Recourse Debt Total	$ 500	500
Parent Company [Member] | 5.125% Senior Notes Due 2027 [Member] | Recourse Debt
Debt Instrument [Line Items]
Interest Rate	5.125%
Recourse Debt Total	$ 500	500
Parent Company [Member] | Unamortized (discount) premium & debt issuance (costs), net
Debt Instrument [Line Items]
Recourse Debt Total	$ (22)	$ (31)

Debt (Recourse Debt Net Princip

Debt (Recourse Debt Net Principal Amounts Due Over Five Years) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Debt Details [Line Items]
Recourse Debt Total	$ 3,396	$ 3,655
Unamortized (discounts)/premiums & debt issuance (costs)
Debt Details [Line Items]
Recourse Debt Total	(22)
Parent Company [Member]
Debt Details [Line Items]
Recourse Debt Total	3,396
Parent Company [Member] | Debt Maturity Year One [Member]
Debt Details [Line Items]
Recourse Debt Total	5
Parent Company [Member] | Debt Maturity Year Two [Member]
Debt Details [Line Items]
Recourse Debt Total	505
Parent Company [Member] | Debt Maturity Year Three [Member]
Debt Details [Line Items]
Recourse Debt Total	8
Parent Company [Member] | Debt Maturity Year Four [Member]
Debt Details [Line Items]
Recourse Debt Total	1,113
Parent Company [Member] | Debt Maturity Year Five [Member]
Debt Details [Line Items]
Recourse Debt Total	243
Parent Company [Member] | Thereafter
Debt Details [Line Items]
Recourse Debt Total	1,544
Parent Company [Member] | Unamortized (discounts)/premiums & debt issuance (costs)
Debt Details [Line Items]
Recourse Debt Total	$ (22)	$ (31)

Debt (Recourse Debt Narrative)

Debt (Recourse Debt Narrative) (Details) - USD ($) $ in Millions	3 Months Ended	9 Months Ended	12 Months Ended
	Mar. 31, 2018	Sep. 30, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Debt Instrument [Line Items]
Loss on extinguishment of debt			$ 169	$ 188	$ 68
LIBOR 1.75% Term Loan Due In 2022 [Member]
Debt Instrument [Line Items]
Debt terminated amount		$ 343
8.0% Senior Notes Due 2020 [Domain]
Debt Instrument [Line Items]
Debt terminated amount	$ 228
7.375% Senior Notes Due 2021 [Member] [Member]
Debt Instrument [Line Items]
Debt terminated amount	690
4.875% Senior Notes Due 2023 [Member] [Member]
Debt Instrument [Line Items]
Debt terminated amount		$ 100
5.5% Senior Notes Due 2024 [Member] [Member]
Debt Instrument [Line Items]
Debt terminated amount	671
5.5% Senior Notes Due 2025 [Member] [Member]
Debt Instrument [Line Items]
Debt terminated amount	29
Senior Notes [Member] | 4.5% Senior Notes Due 2023 [Domain] [Domain]
Debt Instrument [Line Items]
Debt face amount	500
Senior Notes [Member] | 4.0% Senior Notes Due 2021 [Domain] [Domain]
Debt Instrument [Line Items]
Debt face amount	$ 500
Senior Notes [Member] | 4.875% Senior Notes Due 2023 [Member] [Member]
Debt Instrument [Line Items]
Stated interest rate		4.875%
Senior Notes [Member] | 5.5% Senior Notes Due 2024 [Member] [Member]
Debt Instrument [Line Items]
Stated interest rate	5.50%
Senior Notes [Member] | 5.5% Senior Notes Due 2025 [Member] [Member]
Debt Instrument [Line Items]
Stated interest rate	5.50%
Recourse Debt
Recourse Debt Covenants and Guarantees:
Percentage of capital stock of foreign subsidiaries securing obligations			65.00%
Covenants, sale of guarantor or its subsidiaries percentage of proceeds used to repay debt			60.00%
Covenants, sale of guarantor or its subsidiaries percentage of proceeds used to repay debt if debt to cash flow is less than 5			50.00%
Minimum ratio of operating cash flow to interest charges			2.5
Maximum ratio of debt to cash flow			5.75
Unsecured Debt [Member] | 4.5% Senior Notes Due 2023 [Domain] [Domain]
Debt Instrument [Line Items]
Stated interest rate	4.50%
Unsecured Debt [Member] | 8.0% Senior Notes Due 2020 [Domain]
Debt Instrument [Line Items]
Stated interest rate	8.00%
Unsecured Debt [Member] | 7.375% Senior Notes Due 2021 [Member] [Member]
Debt Instrument [Line Items]
Stated interest rate	7.375%
Unsecured Debt [Member] | 4.0% Senior Notes Due 2021 [Domain] [Domain]
Debt Instrument [Line Items]
Stated interest rate	4.00%
Unsecured Debt [Member] | Recourse Debt | Senior Secured Term Loan due 2022 [Member]
Debt Instrument [Line Items]
Payment for Debt Extinguishment or Debt Prepayment Cost				150
Loss on extinguishment of debt				1
Unsecured Debt [Member] | Recourse Debt | 4.0% Senior Notes Due 2021 [Domain] [Domain]
Debt Instrument [Line Items]
Loss on extinguishment of debt	$ 125
Unsecured Debt [Member] | Recourse Debt | 4.875% Senior Notes Due 2023 [Member] [Member]
Debt Instrument [Line Items]
Loss on extinguishment of debt		$ (5)
Unsecured Debt [Member] | Recourse Debt | 5.5% Senior Notes Due 2024 [Member] [Member]
Debt Instrument [Line Items]
Loss on extinguishment of debt	$ 44
Parent Company [Member]
Debt Instrument [Line Items]
Loss on extinguishment of debt			$ 5	$ 171	$ 92

Commitments (Long-Term Purchase

Commitments (Long-Term Purchase Commitments) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Electricity Purchase Contracts
Long-Term Purchase Commitment [Line Items]
Purchases Under Long Term Contracts	$ 1,597	$ 827	$ 747
Purchase Obligation, Due in Next Twelve Months	699
Purchase Obligation, Due in Second Year	509
Purchase Obligation, Due in Third Year	406
Purchase Obligation, Due in Fourth Year	439
Purchase Obligation, Due in Fifth Year	459
Future Commitments Thereafter	5,110
Future Commitments Total	7,622
Fuel Purchase Contracts
Long-Term Purchase Commitment [Line Items]
Purchases Under Long Term Contracts	1,824	1,838	1,619
Purchase Obligation, Due in Next Twelve Months	1,385
Purchase Obligation, Due in Second Year	1,086
Purchase Obligation, Due in Third Year	756
Purchase Obligation, Due in Fourth Year	643
Purchase Obligation, Due in Fifth Year	568
Future Commitments Thereafter	2,601
Future Commitments Total	7,039
Other Purchase Contracts
Long-Term Purchase Commitment [Line Items]
Purchases Under Long Term Contracts	1,684	$ 1,671	$ 1,945
Purchase Obligation, Due in Next Twelve Months	1,551
Purchase Obligation, Due in Second Year	723
Purchase Obligation, Due in Third Year	538
Purchase Obligation, Due in Fourth Year	538
Purchase Obligation, Due in Fifth Year	529
Future Commitments Thereafter	1,745
Future Commitments Total	$ 5,624

Contingencies (Loss Contingenci

Contingencies (Loss Contingencies) (Details) $ in Millions		12 Months Ended
		Dec. 31, 2019USD ($)agreement	Sep. 30, 2019USD ($)	Dec. 31, 2018USD ($)
Loss Contingencies [Line Items]
Guarantor Obligations, Term		less than one year to more than 15 years
Guarantor Obligations, Maximum Exposure, Undiscounted		$ 1,226
Number of Agreements | agreement		77
Environmental Remediation Contingency [Domain]
Environmental Contingencies
Liability recorded for projected environmental remediation costs		$ 4		$ 5
Indemnification Agreement [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted	[1]	$ 12
Number of Agreements	[1]	1
Guarantee Obligations [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted		$ 853
Number of Agreements		37
Litigation
Litigation Contingencies
Aggregate reserves for claims deemed both probable and reasonably estimable		$ 55		$ 53
Parent Company [Member] | Guarantees [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted		$ 865
Number of Agreements		38
Unsecured Debt [Member] | Financial Standby Letter of Credit [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted		$ 342
Number of Agreements		11
Secured Debt [Member] | Financial Standby Letter of Credit [Member]
Loss Contingencies [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted		$ 19
Number of Agreements		28
Minimum [Member] | Standby Letters of Credit [Member]
Loss Contingencies [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage		1.00%
Minimum [Member] | Guarantee Obligations [Member]
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss		$ 0
Minimum [Member] | Litigation
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss		75
Minimum [Member] | Unsecured Debt [Member] | Financial Standby Letter of Credit [Member]
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss		1	$ 1
Minimum [Member] | Secured Debt [Member] | Financial Standby Letter of Credit [Member]
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss		$ 0
Maximum [Member] | Standby Letters of Credit [Member]
Loss Contingencies [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage		3.00%
Maximum [Member] | Environmental Remediation Contingency [Domain]
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss		$ 15
Maximum [Member] | Indemnification Agreement [Member]
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss	[1]	12
Maximum [Member] | Guarantee Obligations [Member]
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss		157
Maximum [Member] | Litigation
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss		503
Maximum [Member] | Unsecured Debt [Member] | Financial Standby Letter of Credit [Member]
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss		296	296
Maximum [Member] | Secured Debt [Member] | Financial Standby Letter of Credit [Member]
Environmental Contingencies
Loss Contingency, Estimate of Possible Loss		$ 4	$ 4
[1]	(1) Excludes normal and customary representations and warranties in agreements for the sale of assets (including ownership in associated legal entities) where the associated risk is considered to be nominal.

Leases Lessee (Details)

Leases Lessee (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Finance Lease Liabilities, Gross Difference, Amount [Abstract]
Finance Lease, Liability, Undiscounted Excess Amount	$ 69
Operating Lease Liabilities, Gross Difference, Amount [Abstract]
Lessee, Operating Lease, Liability, Undiscounted Excess Amount	318
Finance Lease, Liability, Payment, Due [Abstract]
Finance Lease, Liability, Payments, Due Next Twelve Months	4
Finance Lease, Liability, Payments, Due Year Two	4
Finance Lease, Liability, Payments, Due Year Three	4
Finance Lease, Liability, Payments, Due Year Four	4
Finance Lease, Liability, Payments, Due Year Five	4
Finance Lease, Liability, Payments, Due after Year Five	119
Finance Lease, Liability, Payment, Due	139
Assets and Liabilities, Lessee [Abstract]
Finance Lease, Right-of-Use Asset	67
Operating Lease, Right-of-Use Asset	248
Right-of-use Asset, Operating and Financing	315
Finance Lease, Liability, Current	3
Finance Lease, Liability, Noncurrent	67
Finance Lease, Liability	70
Operating Lease, Liability, Current	16
Operating Lease, Liability, Noncurrent	261
Operating Lease, Liability	277
Lease Liability, Operating and Financing	347
Operating Lease, Payments	48
Lessee, Operating Lease, Liability, Payment, Due [Abstract]
Lessee, Operating Lease, Liability, Payments, Due Next Twelve Months	29
Lessee, Operating Lease, Liability, Payments, Due Year Two	27
Lessee, Operating Lease, Liability, Payments, Due Year Three	27
Lessee, Operating Lease, Liability, Payments, Due Year Four	26
Lessee, Operating Lease, Liability, Payments, Due Year Five	26
Lessee, Operating Lease, Liability, Payments, Due after Year Five	460
Lessee, Operating Lease, Liability, Payments, Due	$ 595
Lease, Cost [Abstract]
Finance Lease, Weighted Average Remaining Lease Term	32 years
Operating Lease, Weighted Average Remaining Lease Term	23 years
Finance Lease, Weighted Average Discount Rate, Percent	4.99%
Operating Lease, Weighted Average Discount Rate, Percent	6.99%
Operating Lease, Cost	$ 46
Finance Lease, Right-of-Use Asset, Amortization	2
Finance Lease, Interest Expense	2
Short-term Lease, Cost	38
Variable Lease, Cost	1
Lease, Cost	$ 89

Leases Lessor (Details)

Leases Lessor (Details) - USD ($)	12 Months Ended
	Dec. 31, 2019		Dec. 31, 2018	Dec. 31, 2017
Lessor, Lease, Description [Line Items]
Lease Income	$ 600,000,000
Variable Lease, Income	130,000,000
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	8,505,000,000		$ 8,227,000,000
Sales-type and Direct Financing Leases, Profit (Loss)	36,000,000	[1]	$ 0	$ 0
Sales-type and Direct Financing Leases, Lease Receivable, Fiscal Year Maturity [Abstract]
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Next Twelve Months	2,000,000
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Two Years	2,000,000
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Three Years	2,000,000
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Four Years	2,000,000
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Five Years	2,000,000
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received, Thereafter	38,000,000
Sales-type and Direct Financing Leases, Lease Receivable, Payments to be Received	48,000,000
Lessor, Operating Lease, Payments, Fiscal Year Maturity [Abstract]
Lessor, Operating Lease, Payments to be Received, Next Twelve Months	504,000,000
Lessor, Operating Lease, Payments to be Received, Two Years	474,000,000
Lessor, Operating Lease, Payments to be Received, Three Years	459,000,000
Lessor, Operating Lease, Payments to be Received, Four Years	395,000,000
Lessor, Operating Lease, Payments to be Received, Five Years	396,000,000
Lessor, Operating Lease, Payments to be Received, Thereafter	1,463,000,000
Lessor, Operating Lease, Payments to be Received	3,691,000,000
Sales-type and Direct Financing Leases, Lease Receivables, Gross Difference, Amount [Abstract]
Sales-type and Direct Financing Leases, Lease Receivable, Undiscounted Excess Amount	26,000,000
Sales-type and Direct Financing Leases, Lease Receivable	22,000,000
Distributed Energy [Member]
Lessor, Lease, Description [Line Items]
Sales-type and Direct Financing Leases, Profit (Loss)	(36,000,000)
Property Subject to Operating Lease [Member]
Lessor, Lease, Description [Line Items]
Property, Plant and Equipment, Gross	2,900,000,000
Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment	$ 707,000,000
[1]	Related to losses recognized at commencement of sales-type leases at Distributed Energy. See Note 14 — Leases for further information.

Benefit Plans (Narrative) (Deta

Benefit Plans (Narrative) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)plan	Dec. 31, 2018USD ($)	Dec. 31, 2017USD ($)
Defined Benefit Plan Disclosure [Line Items]
Defined contribution plan, number of plans	4
Defined contribution plan, award vesting period	5 years
Defined contribution plan contributions | $	$ 19	$ 21	$ 23
Defined benefit plan, number of plans disclosure	28
U.S. Non-Union Number of Defined Contribution Plans	2
Parent Company Number of Defined Contribution Plans	1
DPL Number of Non-Union Defined Contribution Plans	1
UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined benefit plan, number of plans disclosure	5

Benefit Plans (Net Funded Statu

Benefit Plans (Net Funded Status) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Benefits Paid	$ (9)	$ (17)
Defined Benefit Plan, Benefit Obligation, Business Combination	0	(4)
Defined Benefit Plan, Plan Assets, Divestiture	(244)	0
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant	0	1
CHANGE IN PROJECTED BENEFIT OBLIGATION:
Benefit obligation, beginning period	417	470
Service cost	8	12	$ 10
Interest cost	19	22	23
Defined Benefit Plan, Benefit Obligation, Interest cost	19	22
Plan amendments	0	0
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement	0	(21)
Actuarial (gain) loss	37	(8)
Effect of foreign currency exchange rate changes	(4)	(38)
Benefit obligation, ending period	224	417	470
CHANGE IN PLAN ASSETS:
Fair value of plan assets, beginning period	410	455
Actual return on plan assets	19	6
Employer contributions	5	21
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	(21)
Effect of foreign currency exchange rate changes	0	(35)
Fair value of plan assets, ending period	129	410	455
Funded status as of December 31	(95)	(7)
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant	0	1
Defined Benefit Plan, Plan Assets, Benefits Paid	(9)	(17)
Defined Benefit Plan, Plan Assets, Divestiture	(296)	0
UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Benefit Obligation, Benefits Paid	(65)	(105)
Defined Benefit Plan, Benefit Obligation, Business Combination	0	0
Defined Benefit Plan, Plan Assets, Divestiture	0	0
Defined Benefit Plan, Benefit Obligation, Contributions by Plan Participant	0	0
CHANGE IN PROJECTED BENEFIT OBLIGATION:
Benefit obligation, beginning period	1,118	1,257
Service cost	11	15	13
Interest cost	44	40	41
Plan amendments	0	10
Defined Benefit Plan, Benefit Obligation, (Increase) Decrease for Settlement	0	0
Actuarial (gain) loss	134	(99)
Effect of foreign currency exchange rate changes	0	0
Benefit obligation, ending period	1,242	1,118	1,257
CHANGE IN PLAN ASSETS:
Fair value of plan assets, beginning period	1,026	1,127
Actual return on plan assets	185	(35)
Employer contributions	8	39
Defined Benefit Plan, Plan Assets, Payment for Settlement	0	0
Effect of foreign currency exchange rate changes	0	0
Fair value of plan assets, ending period	1,154	1,026	$ 1,127
Funded status as of December 31	(88)	(92)
Defined Benefit Plan, Plan Assets, Contributions by Plan Participant	0	0
Defined Benefit Plan, Plan Assets, Benefits Paid	(65)	(105)
Defined Benefit Plan, Plan Assets, Divestiture	$ 0	$ 0

Benefit Plans (Amounts Recogniz

Benefit Plans (Amounts Recognized in the Consolidated Balance Sheets) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Foreign Plan [Member]
AMOUNTS RECOGNIZED ON THE CONSOLIDATED BALANCE SHEETS
Noncurrent assets	$ 0	$ 64
Accrued benefit liability—current	(7)	(6)
Accrued benefit liability—noncurrent	(88)	(65)
Net amount recognized at end of year	(95)	(7)
UNITED STATES
AMOUNTS RECOGNIZED ON THE CONSOLIDATED BALANCE SHEETS
Noncurrent assets	0	0
Accrued benefit liability—current	0	0
Accrued benefit liability—noncurrent	(88)	(92)
Net amount recognized at end of year	$ (88)	$ (92)

Benefit Plans (Accumulated Bene

Benefit Plans (Accumulated Benefit Obligation) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation	$ 188	$ 376
Information for pension plans with an accumulated benefit obligation in excess of plan assets:
Projected benefit obligation	197	89
Accumulated benefit obligation	178	79
Fair value of plan assets	114	33
Information for pension plans with a projected benefit obligation in excess of plan assets:
Projected benefit obligation	224	220
Fair value of plan assets	129	150
UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Accumulated Benefit Obligation	1,224	1,101
Information for pension plans with an accumulated benefit obligation in excess of plan assets:
Projected benefit obligation	1,242	1,118
Accumulated benefit obligation	1,224	1,101
Fair value of plan assets	1,154	1,026
Information for pension plans with a projected benefit obligation in excess of plan assets:
Projected benefit obligation	1,242	1,118
Fair value of plan assets	$ 1,154	$ 1,026

Benefit Plans Benefit Plans (We

Benefit Plans Benefit Plans (Weighted Average Assumptions) (Details)		12 Months Ended
		Dec. 31, 2019Rate	Dec. 31, 2018Rate
Foreign Plan [Member]
Benefit Obligation:
Discount rate		7.58%	5.63%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate	[1]	5.62%	5.23%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets		4.10%	3.94%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase		4.78%	4.65%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase		6.11%	4.79%
UNITED STATES
Benefit Obligation:
Discount rate		3.32%	4.35%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Discount Rate		4.35%	3.67%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Expected Long-term Rate of Return on Plan Assets		5.08%	5.73%
Defined Benefit Plan, Assumptions Used Calculating Net Periodic Benefit Cost, Rate of Compensation Increase		3.34%	3.34%
Defined Benefit Plan, Assumptions Used Calculating Benefit Obligation, Rate of Compensation Increase		3.33%	3.34%
[1]	Includes an inflation factor that is used to calculate future periodic benefit cost, but is not used to calculate the benefit obligation

Benefit Plans (Impact of One Po

Benefit Plans (Impact of One Point Change in Assumptions) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)
Defined Benefit Plan Assumptions Sensitivity To Changes [Abstract]
Increase of 1% in the discount rate	$ (14)
Decrease of 1% in the discount rate	10
Increase of 1% in the long-term rate of return on plan assets	(11)
Decrease of 1% in the long-term rate of return on plan assets	$ 11

Benefit Plans (Net Periodic Ben

Benefit Plans (Net Periodic Benefit Cost) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Foreign Plan [Member]
Components of Net Periodic Benefit Cost:
Service cost	$ 8	$ 12	$ 10
Interest cost	19	22	23
Expected return on plan assets	(14)	(17)	(21)
Amortization of prior service cost	0	0	0
Amortization of net loss	1	3	2
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	0	0	0
Settlement loss recognized	0	4	0
Total pension cost	14	24	14
UNITED STATES
Components of Net Periodic Benefit Cost:
Service cost	11	15	13
Interest cost	44	40	41
Expected return on plan assets	(52)	(64)	(69)
Amortization of prior service cost	5	5	6
Amortization of net loss	15	18	18
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Curtailment	0	1	4
Settlement loss recognized	0	0	0
Total pension cost	$ 23	$ 15	$ 13

Benefit Plans (Accumulated Othe

Benefit Plans (Accumulated Other Comprehensive Income (Loss)) (Details) $ in Millions	Dec. 31, 2019USD ($)
Foreign Plan [Member]
Accumulated Other Comprehensive Income (Loss)
Prior service cost	$ 1
Unrecognized net actuarial loss	(63)
Total	(62)
UNITED STATES
Accumulated Other Comprehensive Income (Loss)
Prior service cost	(4)
Unrecognized net actuarial loss	(23)
Total	$ (27)

Benefit Plans (Plan Asset Alloc

Benefit Plans (Plan Asset Allocations) (Details) - USD ($)	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 129,000,000	$ 410,000,000	$ 455,000,000
Percentage of Plan Assets	100.00%	100.00%
Foreign Plan [Member] | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Target Allocations	13.00%
Percentage of Plan Assets	15.37%	3.75%
Foreign Plan [Member] | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Target Allocations	81.00%
Percentage of Plan Assets	81.67%	93.57%
Foreign Plan [Member] | Real estate
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 2,000,000	$ 2,000,000
Target Allocations	2.00%
Percentage of Plan Assets	1.16%	0.44%
Foreign Plan [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 0	$ 2,000,000
Foreign Plan [Member] | Other
Defined Benefit Plan Disclosure [Line Items]
Target Allocations	4.00%
Percentage of Plan Assets	1.80%	2.24%
UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 1,154,000,000	$ 1,026,000,000	$ 1,127,000,000
Percentage of Plan Assets	100.00%	100.00%
UNITED STATES | Equity securities
Defined Benefit Plan Disclosure [Line Items]
Target Allocations	33.00%
Percentage of Plan Assets	32.22%	16.85%
UNITED STATES | Debt securities
Defined Benefit Plan Disclosure [Line Items]
Target Allocations	65.00%
Percentage of Plan Assets	67.17%	80.20%
UNITED STATES | Real estate
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 3,000,000	$ 24,000,000
Target Allocations	2.00%
Percentage of Plan Assets	0.22%	2.35%
UNITED STATES | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 4,000,000	$ 6,000,000
UNITED STATES | Other
Defined Benefit Plan Disclosure [Line Items]
Target Allocations	0.00%
Percentage of Plan Assets	0.39%	0.60%
Fair Value, Inputs, Level 1 [Member] | Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 37,000,000	$ 317,000,000
Fair Value, Inputs, Level 1 [Member] | Foreign Plan [Member] | Real estate
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Fair Value, Inputs, Level 1 [Member] | Foreign Plan [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	2,000,000
Fair Value, Inputs, Level 1 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	4,000,000	1,002,000,000
Fair Value, Inputs, Level 1 [Member] | UNITED STATES | Real estate
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Fair Value, Inputs, Level 1 [Member] | UNITED STATES | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	4,000,000	6,000,000
Fair Value, Inputs, Level 2 [Member] | Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	88,000,000	84,000,000
Fair Value, Inputs, Level 2 [Member] | Foreign Plan [Member] | Real estate
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Fair Value, Inputs, Level 2 [Member] | Foreign Plan [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Fair Value, Inputs, Level 2 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	1,150,000,000	24,000,000
Fair Value, Inputs, Level 2 [Member] | UNITED STATES | Real estate
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	3,000,000	24,000,000
Fair Value, Inputs, Level 2 [Member] | UNITED STATES | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Fair Value, Inputs, Level 3 [Member] | Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	4,000,000	9,000,000
Fair Value, Inputs, Level 3 [Member] | Foreign Plan [Member] | Real estate
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	2,000,000	2,000,000
Fair Value, Inputs, Level 3 [Member] | Foreign Plan [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Fair Value, Inputs, Level 3 [Member] | UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Fair Value, Inputs, Level 3 [Member] | UNITED STATES | Real estate
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	0	0
Fair Value, Inputs, Level 3 [Member] | UNITED STATES | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Defined Benefit Plan, Plan Assets, Amount	$ 0	$ 0

Benefit Plans (Fair Value of Pl

Benefit Plans (Fair Value of Plan Assets) (Details) - USD ($)		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		$ 1,154,000,000	$ 1,026,000,000	$ 1,127,000,000
UNITED STATES | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		4,000,000	1,002,000,000
UNITED STATES | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		1,150,000,000	24,000,000
UNITED STATES | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		0	0
UNITED STATES | Mutual funds
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		372,000,000	173,000,000
UNITED STATES | Mutual funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		0	173,000,000
UNITED STATES | Mutual funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		372,000,000	0
UNITED STATES | Mutual funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		0	0
UNITED STATES | Mutual funds
Defined Benefit Plan Disclosure [Line Items]
Total plan assets	[1]	775,000,000	653,000,000
UNITED STATES | Mutual funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		0	653,000,000
UNITED STATES | Mutual funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		775,000,000	0
UNITED STATES | Mutual funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		0	0
UNITED STATES | Real estate
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		3,000,000	24,000,000
UNITED STATES | Real estate | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		0	0
UNITED STATES | Real estate | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		3,000,000	24,000,000
UNITED STATES | Real estate | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		0	0
UNITED STATES | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		4,000,000	6,000,000
UNITED STATES | Cash and Cash Equivalents [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		4,000,000	6,000,000
UNITED STATES | Cash and Cash Equivalents [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		0	0
UNITED STATES | Cash and Cash Equivalents [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		0	0
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		129,000,000	410,000,000	$ 455,000,000
Foreign Plan [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		37,000,000	317,000,000
Foreign Plan [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		88,000,000	84,000,000
Foreign Plan [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		4,000,000	9,000,000
Foreign Plan [Member] | Mutual funds
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		19,000,000	14,000,000
Foreign Plan [Member] | Mutual funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		19,000,000	14,000,000
Foreign Plan [Member] | Mutual funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		0	0
Foreign Plan [Member] | Mutual funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		0	0
Foreign Plan [Member] | Private equity
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		1,000,000	1,000,000
Foreign Plan [Member] | Private equity | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		0	0
Foreign Plan [Member] | Private equity | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		0	0
Foreign Plan [Member] | Private equity | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		1,000,000	1,000,000
Foreign Plan [Member] | Government debt securities
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		0	13,000,000
Foreign Plan [Member] | Government debt securities | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		0	13,000,000
Foreign Plan [Member] | Government debt securities | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		0	0
Foreign Plan [Member] | Government debt securities | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		0	0
Foreign Plan [Member] | Mutual funds
Defined Benefit Plan Disclosure [Line Items]
Total plan assets	[2]	105,000,000	371,000,000
Foreign Plan [Member] | Mutual funds | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		17,000,000	287,000,000
Foreign Plan [Member] | Mutual funds | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		88,000,000	84,000,000
Foreign Plan [Member] | Mutual funds | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		0	0
Foreign Plan [Member] | Real estate
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		2,000,000	2,000,000
Foreign Plan [Member] | Real estate | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		0	0
Foreign Plan [Member] | Real estate | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		0	0
Foreign Plan [Member] | Real estate | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		2,000,000	2,000,000
Foreign Plan [Member] | Cash and Cash Equivalents [Member]
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		0	2,000,000
Foreign Plan [Member] | Cash and Cash Equivalents [Member] | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		0	2,000,000
Foreign Plan [Member] | Cash and Cash Equivalents [Member] | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		0	0
Foreign Plan [Member] | Cash and Cash Equivalents [Member] | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		0	0
Foreign Plan [Member] | Other assets
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		2,000,000	7,000,000
Foreign Plan [Member] | Other assets | Level 1
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		1,000,000	1,000,000
Foreign Plan [Member] | Other assets | Level 2
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		0	0
Foreign Plan [Member] | Other assets | Level 3
Defined Benefit Plan Disclosure [Line Items]
Total plan assets		$ 1,000,000	$ 6,000,000
[1]	Mutual funds categorized as debt securities consist of mutual funds for which debt securities are the primary underlying investment
[2]	Mutual funds categorized as debt securities consist of mutual funds for which debt securities are the primary underlying investment

Benefit Plans (Expected Future

Benefit Plans (Expected Future Benefit Payments) (Details) $ in Millions	Dec. 31, 2019USD ($)
UNITED STATES
Defined Benefit Plan Disclosure [Line Items]
Expected employer contribution in 2020	$ 8
Expected benefit payments for fiscal year ending:
2017	71
2018	72
2019	73
2020	73
2021	73
2025 - 2029	365
Foreign Plan [Member]
Defined Benefit Plan Disclosure [Line Items]
Expected employer contribution in 2020	8
Expected benefit payments for fiscal year ending:
2017	15
2018	13
2019	14
2020	15
2021	17
2025 - 2029	$ 105

Equity (Transactions with Nonco

Equity (Transactions with Noncontrolling Interests) (Details) - USD ($) $ in Millions	Sep. 28, 2017	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Mar. 31, 2017	Sep. 30, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Mar. 20, 2018	Jan. 01, 2018	Jun. 25, 2014
Noncontrolling Interest [Line Items]
Gain (Loss) on Disposition of Business		$ 128	$ (21)	$ 89	$ 788			$ 28	$ 984	$ (52)
Stockholders' Equity Attributable to Parent		3,208						2,996	3,208
Additional Paid in Capital		8,154						7,776	8,154
Accumulated Other Comprehensive Income (Loss), Net of Tax		$ (2,071)						(2,229)	(2,071)	(1,876)		$ (1,857)
Distributed Energy [Member]
Noncontrolling Interest [Line Items]
Sales to noncontrolling interests								133	98
Alto Maipo [Member]
Noncontrolling Interest [Line Items]
Gain (Loss) on Disposition of Business						$ 0
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners						6.70%
Business Acquisition, Percentage of Voting Interests Acquired						40.00%
Noncontrolling Interest, Ownership Percentage by Parent						62.00%
Stockholders' Equity Attributable to Parent						$ 196
Additional Paid in Capital						229
Accumulated Other Comprehensive Income (Loss), Net of Tax						$ (33)
Masinloc Subsidiary [Member]
Noncontrolling Interest [Line Items]
Divestiture of Businesses, Portion Contingent Upon Achievement of Certain Restructuring Efficiencies										23			$ 23
Disposal Group Not Discontinued Operation Ownership Interest Sold											51.00%		45.00%
Dominican Republic
Noncontrolling Interest [Line Items]
Gain (Loss) on Disposition of Business							$ 0
Noncontrolling Interest, Ownership Percentage by Noncontrolling Owners							5.00%
Proceeds from divestiture of business	$ 60
Gain on Disposition of Stock in Subsidiary, Recorded to APIC							$ 25
Additional Paid-in Capital [Member]
Noncontrolling Interest [Line Items]
Sales to noncontrolling interests								(5)	(3)	13
Retained Earnings (Accumulated Deficit)
Noncontrolling Interest [Line Items]
Sales to noncontrolling interests								0	0	0
Noncontrolling Interest [Member]
Noncontrolling Interest [Line Items]
Sales to noncontrolling interests								$ 136	$ 98	$ 83

Equity Equity - Net Income (Los

Equity Equity - Net Income (Loss) Attributable to The AES Corporation (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Equity [Abstract]
Net income (loss) attributable to The AES Corporation	$ (78)	$ 210	$ 17	$ 154	$ 128	$ 101	$ 290	$ 684	$ 303	$ 1,203	$ (1,161)
Transfers from the noncontrolling interest:
Net transfers (to) from noncontrolling interest									(5)	(3)	253
Change from net income (loss) attributable to The AES Corporation and transfers (to) from noncontrolling interests									298	1,200	(908)
Additional Paid-in Capital [Member]
Transfers from the noncontrolling interest:
Increase (decrease) in The AES Corporation's paid-in capital for sale of subsidiary shares									(5)	(3)	13
Increase (decrease) in The AES Corporation's paid-in-capital for purchase of subsidiary shares									0	0	240
Retained Earnings [Member]
Transfers from the noncontrolling interest:
Increase (decrease) in The AES Corporation's paid-in capital for sale of subsidiary shares									$ 0	$ 0	0
Increase (decrease) in The AES Corporation's paid-in-capital for purchase of subsidiary shares											$ 0

Equity (Accumulated Other Compr

Equity (Accumulated Other Comprehensive Loss) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Mar. 31, 2019	Mar. 31, 2018
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax, Beginning Balance		$ (1,721)	$ (1,486)
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax, Beginning Balance		(300)	(333)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax, Beginning Balance		(50)	(57)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance		(2,071)	(1,876)
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		(240)	(278)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		86	64
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax		(10)	(182)	$ 634
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax		(223)	26	38
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax		6	5	247
Other Comprehensive Income (Loss), Net of Tax		(227)	(151)	919
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax, Ending Balance		(1,721)	(1,721)	(1,486)
Accumulated Other Comprehensive Income (Loss), Cumulative Changes in Net Gain (Loss) from Cash Flow Hedges, Effect Net of Tax, Ending Balance		(470)	(300)	(333)
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax, Ending Balance		(38)	(50)	(57)
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance		(2,229)	(2,071)	(1,876)
Available-for-Sale securities, net
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		(23)	(214)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		23	(21)
Derivative gains (losses), net
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		(202)	(64)
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		36	78
Unfunded pension obligations, net
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		(15)	0
Reclassification from Accumulated Other Comprehensive Income, Current Period, Net of Tax		27	7
Accumulated Other Comprehensive Loss
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), Foreign Currency Transaction and Translation Adjustment, Net of Tax		0	(235)	661
Other Comprehensive Income (Loss), Derivatives Qualifying as Hedges, Net of Tax		(166)	14	23
Other Comprehensive (Income) Loss, Defined Benefit Plan, after Reclassification Adjustment, after Tax		12	7	229
Other Comprehensive Income (Loss), Net of Tax		(154)	(214)	913
Cumulative effect of a change in accounting principle (1)	[1]			$ 0	$ (4)	$ 19
ASC 606 Impact [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax, Beginning Balance		0
Accumulated Other Comprehensive Income (Loss), Foreign Currency Translation Adjustment, Net of Tax, Ending Balance			0
ASC 606 Impact [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Net of Tax, Beginning Balance		17
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			19
Accumulated Other Comprehensive Income (Loss), Net of Tax, Ending Balance			17
ASC 606 Impact [Member] | Derivative gains (losses), net
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax			19
ASC 606 Impact [Member] | Unfunded pension obligations, net
Accumulated Other Comprehensive Income (Loss) [Line Items]
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax, Beginning Balance		0
Accumulated Other Comprehensive Income (Loss), Pension and Other Postretirement Benefit Plans, Net of Tax, Ending Balance			$ 0
Accounting Standards Update 2017-12 [Member]
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		(4)
Accounting Standards Update 2017-12 [Member] | Available-for-Sale securities, net
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		0
Accounting Standards Update 2017-12 [Member] | Derivative gains (losses), net
Accumulated Other Comprehensive Income (Loss) [Line Items]
Other Comprehensive Income (Loss), before Reclassifications, Net of Tax		$ (4)
[1]	See Note 1 — General and Summary of Significant Accounting Policies

Equity (Reclassifications Out o

Equity (Reclassifications Out of AOCL) (Details) - USD ($) $ in Millions	3 Months Ended														12 Months Ended
	Dec. 31, 2019		Sep. 30, 2019	Jun. 30, 2019		Mar. 31, 2019	Dec. 31, 2018		Sep. 30, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gain (Loss) on Disposition of Business							$ 128		$ (21)		$ 89		$ 788		$ 28	$ 984	$ (52)
Cost of Goods and Services Sold															7,840	8,163	8,065
General and administrative expenses															196	192	215
Other Expenses															(80)	(58)	(58)
Interest expense															(1,050)	(1,056)	(1,170)
Foreign currency transaction gains (losses)															(67)	(72)	42
Income from continuing operations before taxes and equity in earnings of affiliates															1,001	2,018	771
Income tax expense															352	708	990
Net equity in earnings (losses) of affiliates	$ (175)														(172)	39	71
Income (loss) from continuing operations	(120)	[1]	$ 298	$ 66	[1]	$ 233	155	[2]	192	[2]	224	[2]	778	[2]	477	1,349	(148)
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, Net of Tax															0	9	18
Net gain from disposal of discontinued operations															1	225	(611)
Net income (loss)	(120)		298	67		233	181		191		416		777		478	1,565	(777)
Less: Income from continuing operations attributable to noncontrolling interests and redeemable stock of subsidiaries															(175)	(364)	(359)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Noncontrolling Interest															0	2	(25)
Net income attributable to The AES Corporation	$ (78)		$ 210	$ 17		$ 154	$ 128		$ 101		$ 290		$ 684		303	1,203	(1,161)
Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net income attributable to The AES Corporation															(86)	(64)	(928)
Available-for-Sale securities, net | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gain (Loss) on Disposition of Business															(23)	19	(188)
Net gain from disposal of discontinued operations															0	2	(455)
Net income attributable to The AES Corporation															(23)	21	(643)
Accumulated Net Gain (Loss) from Cash Flow Hedges Including Portion Attributable to Noncontrolling Interest [Member] | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gain (Loss) on Disposition of Business															1	0	0
Revenue from Contract with Customer, Excluding Assessed Tax															(1)	(6)	25
Cost of Goods and Services Sold															(12)	(3)	(12)
Interest expense															(26)	(49)	(79)
Foreign currency transaction gains (losses)															(12)	(59)	15
Income tax expense															13	24	1
Net equity in earnings (losses) of affiliates															(5)	0	0
Derivative gains (losses), net | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Income from continuing operations before taxes and equity in earnings of affiliates															(50)	(117)	(51)
Income (loss) from continuing operations															(42)	(93)	(50)
Net income attributable to The AES Corporation															(36)	(78)	(37)
Accumulated Net Gain (Loss) from Cash Flow Hedges Attributable to Noncontrolling Interest [Member] | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Less: Income from continuing operations attributable to noncontrolling interests and redeemable stock of subsidiaries															6	15	13
Amortization of defined benefit pension actuarial losses, net | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Cost of Goods and Services Sold															0	0	1
Income from continuing operations before taxes and equity in earnings of affiliates															(28)	(6)	0
Income (loss) from continuing operations															(28)	(4)	0
Net income (loss)															(28)	(6)	(266)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Noncontrolling Interest															0	0	18
Net income attributable to The AES Corporation															(27)	(7)	(248)
Accumulated Defined Benefit Plans Adjustment Attributable to Noncontrolling Interest [Member] | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Less: Income from continuing operations attributable to noncontrolling interests and redeemable stock of subsidiaries															1	(1)	0
Accumulated Defined Benefit Plans Adjustment Including Portion Attributable to Noncontrolling Interest [Member] | Reclassification out of Accumulated Other Comprehensive Income
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Gain (Loss) on Disposition of Business															(26)	0	0
General and administrative expenses															0	0	(1)
Other Expenses															(2)	(6)	0
Income tax expense															0	2	0
Net gain from disposal of discontinued operations															$ 0	$ (2)	$ (266)
[1]	Includes pre-tax impairment expense of $116 million and $69 million , in the second and fourth quarters of 2019 , respectively (See Note 22 — Asset Impairment Expense ), other-than-temporary impairment of OPGC of $92 million and net equity in losses of affiliates, primarily at Guacolda, of $175 million , in the fourth quarter of 2019 (See Note 8 — Investments in and Advances to Affiliates ).
[2]	Includes pre-tax gains on sales of business interests of $788 million , $89 million and $128 million , in the first, second and fourth quarters of 2018 , respectively, and pre-tax losses of $21 million in the third quarter of 2018 (See Note 25 — Held-for-Sale and Dispositions ), pre-tax impairment expense of $92 million , $74 million and $42 million , in the second, third and fourth quarters of 2018 , respectively (See Note 22 — Asset Impairment Expense ), other-than-temporary impairment of Guacolda of $144 million in the fourth quarter of 2018 (See Note 8 — Investments in and Advances to Affiliates ), SAB 118 charges to finalize the provisional estimate of one-time transition tax on foreign earnings of $33 million and $161 million in the third and fourth quarters of 2018 , respectively, and a SAB 118 income tax benefit to finalize the provisional estimate of remeasurement of deferred tax assets and liabilities to the lower corporate tax rate of $77 million in the fourth quarter of 2018 (See Note 23 — Income Taxes ).

Equity Equity (Dividends) (Deta

Equity Equity (Dividends) (Details) - USD ($) $ / shares in Units, $ in Millions	Dec. 06, 2019	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2019
Subsequent Event [Line Items]
Common Stock, Dividends, Per Share, Cash Paid			$ 0.1365	$ 0.1365	$ 0.1365	$ 0.1365
Dividends declared on common stock (per share amount)	$ 0.1433	$ 0.28	$ 0.14	$ 0	$ 0.14	$ 0.27	$ 0.13	$ 0	$ 0.13	$ 0.5528	$ 0.5300	$ 0.4900
Treasury Stock, Value, Acquired, Cost Method													$ 1,900
Acquisition of treasury stock (shares)										0			154,300,000
Treasury Stock Acquired, Average Cost Per Share													$ 12.12
Stock Repurchase Program, Remaining Authorized Repurchase Amount		$ 264								$ 264			$ 264
Treasury stock, shares (in shares)		153,891,260				154,905,595				153,891,260	154,905,595		153,891,260

Equity Equity (Stock Repurchase

Equity Equity (Stock Repurchases) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended	114 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018
Equity, Class of Treasury Stock [Line Items]
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 264	$ 264
Treasury Stock, Shares	153,891,260	153,891,260	154,905,595
Acquisition of treasury stock (shares)	0	154,300,000
Treasury Stock Acquired, Average Cost Per Share		$ 12.12
Treasury Stock, Value, Acquired, Cost Method		$ 1,900

Equity Deconsolidation (Details

Equity Deconsolidation (Details) - USD ($) $ in Millions	3 Months Ended				12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Gain (Loss) on Disposition of Business	$ 128	$ (21)	$ 89	$ 788	$ 28	$ 984	$ (52)

Segment and Geographic Inform_3

Segment and Geographic Information (Details)	12 Months Ended
	Dec. 31, 2019segment
Segment Reporting Information [Line Items]
Number of Reportable Segments	4

Segments and Geographic Infor_2

Segments and Geographic Information Segment and Geographic Information ( Revenue by Segment) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues	$ 2,431	$ 2,625	$ 2,483	$ 2,650	$ 2,622	$ 2,837	$ 2,537	$ 2,740	$ 10,189	$ 10,736	$ 10,530
US and Utilities SBU
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									4,058	4,230
South America [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									3,208	3,533
MCAC [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									1,882	1,728
EURASIA [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									1,047	1,255
Corporate and Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									(6)	(10)
Corporate, Non-Segment [Member] | Corporate and Other
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									46	41	35
Intersegment Eliminations
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									(52)	(51)	(28)
Operating Segments [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									10,189	10,736	10,530
Operating Segments [Member] | US and Utilities SBU
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									4,058	4,230	4,162
Operating Segments [Member] | South America [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									3,208	3,533	3,252
Operating Segments [Member] | MCAC [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									1,882	1,728	1,519
Operating Segments [Member] | EURASIA [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Revenues									$ 1,047	$ 1,255	$ 1,590

Segments and Geographic Infor_3

Segments and Geographic Information Segment and Geographic Information (Adjusted Pre-Tax Contributions & Reconcilliation of Income Before Income Taxes) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Reporting Information Adjusted Pretax Contribution		$ 1,240	$ 1,185	$ 1,017
Reconciliation To Income From Continuing Operations Before Taxes
INCOME FROM CONTINUING OPERATIONS BEFORE TAXES AND EQUITY IN EARNINGS OF AFFILIATES		1,001	2,018	771
Net equity in earnings (losses) of affiliates	$ (175)	(172)	39	71
Income (Loss) from Continuing Operations before Income Taxes, Noncontrolling Interest		(277)	(509)	(521)
Pre-tax contribution		552	1,548	321
Unrealized derivative and equity securities losses (gains)		(113)	(33)	3
Unrealized foreign currency losses (gains)		(36)	(51)	59
Disposition/acquisition losses (gains)		(12)	934	(123)
Impairment expense		(406)	(307)	(542)
Loss on extinguishment of debt		(121)	(180)	(62)
One time restructuring costs		0	0	31
Operating Segments | US and Utilities SBU
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Reporting Information Adjusted Pretax Contribution		569	511	424
Reconciliation To Income From Continuing Operations Before Taxes
Net equity in earnings (losses) of affiliates		11	35	41
Operating Segments | South America [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Reporting Information Adjusted Pretax Contribution		504	519	446
Reconciliation To Income From Continuing Operations Before Taxes
Net equity in earnings (losses) of affiliates		(129)	15	28
Operating Segments | MCAC SBU
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Reporting Information Adjusted Pretax Contribution		367	300	277
Reconciliation To Income From Continuing Operations Before Taxes
Net equity in earnings (losses) of affiliates		(13)	(7)	(4)
Operating Segments | EURASIA [Member]
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Reporting Information Adjusted Pretax Contribution		159	222	290
Reconciliation To Income From Continuing Operations Before Taxes
Net equity in earnings (losses) of affiliates		(9)	14	9
Intersegment Eliminations
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Reporting Information Adjusted Pretax Contribution		(12)	(21)	(9)
Corporate, Non-Segment [Member] | Corporate and Other
Segment Reporting, Reconciling Item for Operating Profit (Loss) from Segment to Consolidated [Line Items]
Segment Reporting Information Adjusted Pretax Contribution		(347)	(346)	(411)
Reconciliation To Income From Continuing Operations Before Taxes
Net equity in earnings (losses) of affiliates		$ (32)	$ (18)	$ (3)

Segments and Geographic Infor_4

Segments and Geographic Information Segment and Geographic Information (Assets, Depreciation and Amortization and Capital Expenditures ) (Details) - USD ($) $ in Millions	3 Months Ended	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Segment Reporting Information [Line Items]
Total Assets	$ 33,648	$ 33,648	$ 32,521	$ 33,112
Depreciation and Amortization		1,045	1,003	1,169
Capital Expenditures		2,551	2,396	2,356
Interest Income		318	310	244
Interest Expense		1,050	1,056	1,170
Investments in and Advances to Affiliates	966	966	1,114	1,197
Net Equity in Earnings (Losses) of Affiliates	(175)	(172)	39	71
Operating Segments [Member] | US and Utilities SBU
Segment Reporting Information [Line Items]
Total Assets	13,334	13,334	12,286	11,548
Depreciation and Amortization		465	449	487
Capital Expenditures		1,484	1,373	905
Interest Income		18	10	5
Interest Expense		301	287	315
Investments in and Advances to Affiliates	465	465	538	535
Net Equity in Earnings (Losses) of Affiliates		11	35	41
Operating Segments [Member] | South America [Member]
Segment Reporting Information [Line Items]
Total Assets	11,314	11,314	10,941	11,126
Depreciation and Amortization		315	300	301
Capital Expenditures		692	662	477
Interest Income		95	92	95
Interest Expense		285	283	297
Investments in and Advances to Affiliates	77	77	213	358
Net Equity in Earnings (Losses) of Affiliates		(129)	15	28
Operating Segments [Member] | MCAC SBU
Segment Reporting Information [Line Items]
Total Assets	4,770	4,770	4,462	4,087
Depreciation and Amortization		183	141	122
Capital Expenditures		344	302	435
Interest Income		22	20	13
Interest Expense		142	124	111
Investments in and Advances to Affiliates	107	107	5	(5)
Net Equity in Earnings (Losses) of Affiliates		(13)	(7)	(4)
Operating Segments [Member] | EURASIA [Member]
Segment Reporting Information [Line Items]
Total Assets	3,990	3,990	4,538	6,002
Depreciation and Amortization		67	99	127
Capital Expenditures		30	51	211
Interest Income		180	186	130
Interest Expense		127	145	167
Investments in and Advances to Affiliates	215	215	293	307
Net Equity in Earnings (Losses) of Affiliates		(9)	14	9
Segment Reconciling Items [Member] | Discontinued Operations, Disposed of by Sale [Member]
Segment Reporting Information [Line Items]
Total Assets	0	0	0	86
Depreciation and Amortization		0	0	123
Capital Expenditures		0	0	315
Corporate, Non-Segment [Member] | Corporate and Other
Segment Reporting Information [Line Items]
Total Assets	240	240	294	263
Depreciation and Amortization		15	14	9
Capital Expenditures		1	8	13
Interest Income		3	2	1
Interest Expense		195	217	280
Investments in and Advances to Affiliates	$ 102	102	65	2
Net Equity in Earnings (Losses) of Affiliates		$ (32)	$ (18)	$ (3)

Segments and Geographic Infor_5

Segments and Geographic Information Segment and Geographic Information (Revenue and Assets by Country) (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue		$ 2,431	$ 2,625	$ 2,483	$ 2,650	$ 2,622	$ 2,837	$ 2,537	$ 2,740	$ 10,189	$ 10,736	$ 10,530
Property, plant and equipment, net		22,574				21,396				22,574	21,396
UNITED STATES
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	[1]									3,230	3,462	3,487
Property, plant and equipment, net	[1]	9,706				8,731				9,706	8,731
Total Non-U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										6,959	7,274	7,043
Property, plant and equipment, net		12,868				12,665				12,868	12,665
PHILIPPINES
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	[2]									0	93	449
Property, plant and equipment, net	[2]	0				0				0	0
Brazil
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										525	527	541
Property, plant and equipment, net		1,260				1,287				1,260	1,287
CHILE
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										1,839	2,087	1,944
Property, plant and equipment, net		5,939				5,453				5,939	5,453
Dominican Republic
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										877	884	826
Property, plant and equipment, net		1,002				903				1,002	903
El Salvador
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										824	768	686
Property, plant and equipment, net		343				334				343	334
Colombia
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										472	428	332
Property, plant and equipment, net		340				302				340	302
ARGENTINA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										373	487	435
Property, plant and equipment, net		392				234				392	234
Vietnam
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	[3]									343	245	278
Property, plant and equipment, net	[3]	2				2				2	2
Mexico
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										402	399	352
Property, plant and equipment, net		648				666				648	666
UNITED KINGDOM
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	[4]									147	390	328
Property, plant and equipment, net	[4]	0				90				0	90
BULGARIA
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										459	426	367
Property, plant and equipment, net		1,104				1,183				1,104	1,183
Panama
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										601	438	338
Property, plant and equipment, net		1,819				1,777				1,819	1,777
Puerto Rico
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	[1]									294	257	247
Property, plant and equipment, net	[1]	538				553				538	553
JORDAN
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue	[5]									95	95	95
Property, plant and equipment, net	[5]	0				418				0	418
KAZAKHSTAN
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										0	0	67
Property, plant and equipment, net		0				0				0	0
Other Non-U.S.
Revenues from External Customers and Long-Lived Assets [Line Items]
Revenue										2	7	$ 5
Property, plant and equipment, net		$ 19				$ 16				$ 19	$ 16
[1]	Includes Puerto Rico revenues of $294 million , $257 million and $247 million for the years ended December 31, 2019 , 2018 and 2017 , respectively, and property, plant & equipment of $538 million and $553 million as of December 31, 2019 and 2018 , respectively.
[2]	The Masinloc property, plant and equipment was classified as held-for-sale as of December 31, 2017, and deconsolidated upon completion of the sale in March 2018. See Note 25 — Held-For-Sale and Dispositions for further information.
[3]	The Mong Duong II power project is operated under a build, operate and transfer contract. Future expected payments for the construction performance obligation are recognized in Loan receivable on the Consolidated Balance Sheets. See Note 20 — Revenue for further information.
[4]	The Kilroot and Ballylumford property, plant and equipment was deconsolidated upon completion of the sale in June 2019. See Note 25 — Held-For-Sale and Dispositions for further information.
[5]	The property, plant and equipment in Jordan was classified as held-for-sale as of December 31, 2019. See Note 25 — Held-For-Sale and Dispositions for further information.

Share-Based Compensation (Stock

Share-Based Compensation (Stock Option Compensation Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pretax compensation expense	$ 22	$ 20	$ 8

Share-Based Compensation (Sto_2

Share-Based Compensation (Stock Option Activity) (Details) - Stock Options	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock Option Grant Price As Percent Of Market Price	100.00%	100.00%	100.00%
Share-based Compensation Arrangement by Share-based Payment Award, Award Vesting Period	3 years	3 years	3 years
Weighted Average Exercise Price (in dollars per share):
Stock option contractual term	10 years	10 years	10 years

Share-Based Compensation (RSU C

Share-Based Compensation (RSU Compensation Expense) (Details) - USD ($) $ in Millions		12 Months Ended
		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pretax compensation expense		$ 22	$ 20	$ 8
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pretax compensation expense		10	11	17
Tax benefit		(1)	(2)	(4)
Compensation expense, net of tax		9	9	13
Total value of RSUs converted	[1]	12	10	10
Total fair value of RSUs vested		$ 10	$ 16	$ 15
[1]	Amount represents fair market value on the date of conversion.

Share-Based Compensation (RSU A

Share-Based Compensation (RSU Activity) (Details) - RSUs - USD ($) $ / shares in Units, shares in Thousands, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Estimated Forfeiture Rate Non Officers	11.95%
Period of straight-line expense - RSUs	3 years
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	1 year 9 months 18 days
RSUs (Number of Shares):
Nonvested at beginning of period	1,923
Vested	(996)	(1,428)	(1,337)
Forfeited and expired	(68)
Granted	625
Nonvested at end of period	1,484	1,923
Vested and expected to vest at end of period	1,360
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 10
Weighted Average Grant Date Fair Value (in dollars per share):
Nonvested at beginning of period	$ 10.80
Vested	10.37
Forfeited and expired	11.97
Granted	17.53
Nonvested at end of period	13.73	$ 10.80
Vested and expected to vest at end of period	$ 13.57
Nonvested at end of period, weighted average remaining vesting term	1 year 4 months 24 days
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Related To Current Current Year Grants Per Year	$ 10

Share-Based Compensation (RSUs

Share-Based Compensation (RSUs Vested and Converted) (Details) - RSUs - shares shares in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
RSUs vested during the year	996	1,428	1,337
RSUs converted during the year, net of shares withheld for taxes	666	950	865
Shares withheld for taxes	329	478	472

Share-Based Compensation (PSU A

Share-Based Compensation (PSU Activity) (Details)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Performance Cash Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Vesting Rule, Measurement Period	3 years	3 years	3 years
Minimum [Member] | PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Award Payout Range	0.00%	0.00%	0.00%
Maximum [Member] | PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Award Payout Range	200.00%	200.00%	200.00%

Share-Based Compensation (Narra

Share-Based Compensation (Narrative) (Details) - USD ($) $ / shares in Units, $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Pretax compensation expense	$ 22	$ 20	$ 8
Performance Cash Units [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Performance stock units vesting rule measurement period	3 years	3 years	3 years
RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share Based Compensation Estimated Forfeiture Rate Non Officers	11.95%
Period of straight-line expense - RSU's	3 years
Pretax compensation expense	$ 10	$ 11	$ 17
Award vesting period	3 years	3 years	3 years
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Amount	$ 10
Share-based Payment Arrangement, Nonvested Award, Cost Not yet Recognized, Period for Recognition	1 year 9 months 18 days
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 13.73	$ 10.80
Weighted Average Grant Date Fair Value	$ 17.53
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Related To Current Current Year Grants Per Year	$ 10
Stock Options
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Stock option grant price as percent of market price	100.00%	100.00%	100.00%
Award vesting period	3 years	3 years	3 years
Stock option contractual term	10 years	10 years	10 years
Weighted Average [Member] | RSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Weighted Average Grant Date Fair Value	$ 17.53	$ 10.55	$ 11.93
Minimum | PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Award Payout Range	0.00%	0.00%	0.00%
Maximum | PSUs
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Award Payout Range	200.00%	200.00%	200.00%

Redeemable Stock of Subsidiar_3

Redeemable Stock of Subsidiaries (Narrative) (Details) $ / shares in Units, $ in Millions		12 Months Ended
		Dec. 31, 2019USD ($)seriesquarter$ / shares	Dec. 31, 2018USD ($)seriesquarter$ / shares	Dec. 31, 2017USD ($)
Temporary Equity [Line Items]
Temporary Equity, Accretion to Redemption Value		$ 6	$ 4
Temporary equity carrying amount		888	879	$ 837
Temporary Equity, Other Changes		10	34
Temporary Equity, Net Income		(7)	2
Colon [Domain]
Temporary Equity [Line Items]
Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount	[1]	210	201
Temporary Equity, Other Changes		10	34
IPALCO Enterprises, Inc. [Member]
Temporary Equity [Line Items]
Redeemable Noncontrolling Interest, Equity, Common, Carrying Amount		618	618
IPL Subsidiary
Temporary Equity [Line Items]
Redeemable Noncontrolling Interest, Equity, Preferred, Carrying Amount		60	60
Temporary equity carrying amount		$ 60	$ 60
Number of preferred stock series | series		5	5
Temporary equity annual dividend requirement		$ 3	$ 3
Number of consecutive quarters without paid dividends to invoke board of directors election rule | quarter		4	4
IPL Subsidiary | Minimum
Temporary Equity [Line Items]
Temporary equity, redemption price per share | $ / shares		$ 100	$ 100
IPL Subsidiary | Maximum
Temporary Equity [Line Items]
Temporary equity, redemption price per share | $ / shares		$ 118	$ 118
Other Comprehensive Income (Loss) [Member]
Temporary Equity [Line Items]
Temporary Equity, Other Changes		$ 0	$ 2
[1]	Characteristics of quotas are similar to common stock.

Revenue Disaggregation of Reven

Revenue Disaggregation of Revenue (Details) - USD ($) $ in Millions		3 Months Ended								12 Months Ended
		Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Disaggregation of Revenue [Line Items]
Revenues		$ 2,431	$ 2,625	$ 2,483	$ 2,650	$ 2,622	$ 2,837	$ 2,537	$ 2,740	$ 10,189	$ 10,736	$ 10,530
Regulated Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax										2,979	2,885
Other non-606 revenue										49	54
Revenues										3,028	2,939
Non-regulated revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax										6,555	7,075
Other non-606 revenue	[1]									606	722
Revenues										7,161	7,797
US and Utilities [Domain]
Disaggregation of Revenue [Line Items]
Revenues										4,058	4,230
US and Utilities [Domain] | Regulated Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax										2,979	2,885
Other non-606 revenue										49	54
Revenues										3,028	2,939
US and Utilities [Domain] | Non-regulated revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax										767	972
Other non-606 revenue	[1]									263	319
Revenues										1,030	1,291
South America [Member]
Disaggregation of Revenue [Line Items]
Revenues										3,208	3,533
South America [Member] | Regulated Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax										0	0
Other non-606 revenue										0	0
Revenues										0	0
South America [Member] | Non-regulated revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax										3,205	3,529
Other non-606 revenue	[1]									3	4
Revenues										3,208	3,533
MCAC [Member]
Disaggregation of Revenue [Line Items]
Revenues										1,882	1,728
MCAC [Member] | Regulated Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax										0	0
Other non-606 revenue										0	0
Revenues										0	0
MCAC [Member] | Non-regulated revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax										1,788	1,642
Other non-606 revenue	[1]									94	86
Revenues										1,882	1,728
EURASIA [Member]
Disaggregation of Revenue [Line Items]
Revenues										1,047	1,255
EURASIA [Member] | Regulated Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax										0	0
Other non-606 revenue										0	0
Revenues										0	0
EURASIA [Member] | Non-regulated revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax										799	943
Other non-606 revenue	[1]									248	312
Revenues										1,047	1,255
Corporate Other And Other Eliminations [Member]
Disaggregation of Revenue [Line Items]
Revenues										(6)	(10)
Corporate Other And Other Eliminations [Member] | Regulated Revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax										0	0
Other non-606 revenue										0	0
Revenues										0	0
Corporate Other And Other Eliminations [Member] | Non-regulated revenue [Member]
Disaggregation of Revenue [Line Items]
Revenue from Contract with Customer, Including Assessed Tax										(4)	(11)
Other non-606 revenue	[1]									(2)	1
Revenues										$ (6)	$ (10)
[1]	Other non-regulated revenue primarily includes lease and derivative revenue not accounted for under ASC 606.

Revenue Contract Balances (Deta

Revenue Contract Balances (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Jan. 01, 2018	Dec. 31, 2017
Revenue [Abstract]
Contract with Customer, Liability	$ 117	$ 109
Contract with Customer, Liability, Revenue Recognized	13	36
Financing Receivable, before Allowance for Credit Loss, Noncurrent	$ 1,351	$ 1,423	$ 1,490	$ 0

Revenue Remaining Performance O

Revenue Remaining Performance Obligations (Details) $ in Millions	Dec. 31, 2019USD ($)
Remaining Performance Obligations [Abstract]
Revenue, Remaining Performance Obligation, Amount	$ 12

Other Income and Expense (Nonop

Other Income and Expense (Nonoperating Income) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Liquidation Basis of Accounting, Remeasurement, Gain (Loss) on Asset					$ 0
Total other income	$ 145		$ 72		120
Sales-type and Direct Financing Leases, Profit (Loss)	36	[1]	0		0
Loss On Sale And Disposal Of Assets	22	[2]	30	[2]	28
Defined Benefit Plan, Other Cost (Credit)	17		10		1
Allowance for other receivables	0		7		0
Water Rights Write-Off	0		0		19
Other Cost and Expense, Operating	5		11		10
Other Expenses	80		58		58
Other Income [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Insured Event, Gain (Loss)	118	[3]	0		0
Litigation Settlement, Amount Awarded from Other Party	0		0		60	[4]
Public Utilities, Allowance for Funds Used During Construction, Additions	3		8		26
Other	24		32		34
Total other income	145		$ 72		$ 120
Distributed Energy [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Sales-type and Direct Financing Leases, Profit (Loss)	$ (36)
[1]	Related to losses recognized at commencement of sales-type leases at Distributed Energy. See Note 14 — Leases for further information.
[2]	Associated with a loss due to damage from a lightning incident at the Andres facility in the Dominican Republic in September 2018 and a loss associated with upgrading the tunnel lining at Changuinola in 2019.
[3]	Associated with recoveries for property damage at the Andres facility in the Dominican Republic from a lightning incident in September 2018 and the upgrade of the tunnel lining at Changuinola.
[4]	In December 2016, the Company and YPF entered into a settlement in which all parties agreed to give up any and all legal action related to gas supply contracts that were terminated in 2008 and have been in dispute since 2009. In January 2017, the YPF board approved the agreement and paid the Company $60 million , thereby resolving all uncertainties around the dispute.

Other Income and Expense (Other

Other Income and Expense (Other Expense) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017
Schedule of other operating expense [Line Items]
Sales-type and Direct Financing Leases, Profit (Loss)	$ 36	[1]	$ 0		$ 0
Allowance for other receivables	0		7		0
Loss On Sale And Disposal Of Assets	22	[2]	30	[2]	28
Water Rights Write-Off	0		0		19
Other	5		11		10
Defined Benefit Plan, Other Cost (Credit)	17		10		1
Other Expenses	$ 80		$ 58		$ 58
[1]	Related to losses recognized at commencement of sales-type leases at Distributed Energy. See Note 14 — Leases for further information.
[2]	Associated with a loss due to damage from a lightning incident at the Andres facility in the Dominican Republic in September 2018 and a loss associated with upgrading the tunnel lining at Changuinola in 2019.

Asset Impairment Expense (Impai

Asset Impairment Expense (Impairment of Long-Lived Assets Held and Used by Asset) (Details) - USD ($) $ in Millions	3 Months Ended					12 Months Ended
	Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Asset Impairment Expense [Line Items]
Asset impairment expense	$ (69)	$ (116)	$ (42)	$ (74)	$ (92)	$ (185)	$ (208)	$ (537)
Impairment of Long-Lived Assets Held-for-use						185	208	537
Kilroot and Ballylumford [Member]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use						115	0	37
Hawaii Subsidiary [Member]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use						60	0	0
Shady Point [Member]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use						0	157	0
Nejapa [Member]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use						0	37	0
DPL Subsidiary [Member]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use						0	0	175
Laurel Mountain [Member]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use						0	0	121
Kazakhstan Hydro [Member]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets to be Disposed of						0	0	92
Kazakhstan [Member]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets to be Disposed of						0	0	94
Other
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use						$ 10	$ 14	$ 18

Asset Impairment Expense (Narra

Asset Impairment Expense (Narrative) (Details) - USD ($) $ in Millions		3 Months Ended					12 Months Ended
		Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Mar. 31, 2017
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use							$ 185	$ 208	$ 537
Other Asset Impairment Charges		$ 69	$ 116	$ 42	$ 74	$ 92	185	208	537
Hawaii Subsidiary [Member]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use							60	0	0
Kilroot and Ballylumford [Member]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use							115	0	37
Assets carrying amount		114					114
Shady Point [Member]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use							0	157	0
Assets carrying amount				30				30
Nejapa [Member]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use							0	37	0
Assets carrying amount				$ 5				5
DPL Subsidiary [Member]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use							0	0	175
Laurel Mountain [Member]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use							0	0	121
Kazakhstan Hydro [Member]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets to be Disposed of							0	0	92
Kazakhstan [Member]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets to be Disposed of							0	0	94
Long Lived Assets Held For Sale [Member] | Kilroot and Ballylumford [Member]
Asset Impairment Expense [Line Items]
Other Asset Impairment Charges	[1]						115
Assets carrying amount			$ 232
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Stuart Station [Member]
Asset Impairment Expense [Line Items]
Assets carrying amount									3
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Killen Station [Member]
Asset Impairment Expense [Line Items]
Assets carrying amount									8
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | DPL Subsidiary [Member]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets to be Disposed of									66
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | DPL Peaking Generation [Domain]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets to be Disposed of									109
Assets carrying amount									346
Fair Value Less Costs To Sell									237
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Kazakhstan Hydro [Member]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets to be Disposed of									92
Assets carrying amount		190					190
Disposal Group, Including Discontinued Operation, Foreign Currency Translation Gains (Losses)									100
Fair Value Less Costs To Sell		92					92
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Kazakhstan [Member]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets to be Disposed of									94
Assets carrying amount										$ 171
Disposal Group, Including Discontinued Operation, Foreign Currency Translation Gains (Losses)									92
Fair Value Less Costs To Sell										$ 29
Long Lived Assets Held And Used [Member] | Hawaii Subsidiary [Member]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use							60
Assets carrying amount		103					103
Long Lived Assets Held And Used [Member] | Kilroot [Member]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use								37
Assets carrying amount		$ 20					$ 20
Long Lived Assets Held And Used [Member] | Shady Point [Member]
Asset Impairment Expense [Line Items]
Other Asset Impairment Charges	[1]							157
Long Lived Assets Held And Used [Member] | Nejapa [Member]
Asset Impairment Expense [Line Items]
Other Asset Impairment Charges	[2]							$ 37
Long Lived Assets Held And Used [Member] | Laurel Mountain [Member]
Asset Impairment Expense [Line Items]
Impairment of Long-Lived Assets Held-for-use									121
Assets carrying amount									$ 33
[1]	Per the Company's policy, pre-tax loss is limited to the impairment of long-lived assets. Any additional loss will be recognized on completion of the sale. See Note 22 — Asset Impairment Expense and Note 25 — Held-for-Sale and Dispositions for further information.
[2]	See Note 22 — Asset Impairment Expense for further information.

Income Taxes (Components of Inc

Income Taxes (Components of Income Taxes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Federal:
Current	$ (7)	$ 7	$ 0
Deferred	(4)	186	545
State:
Current	(1)	2	0
Deferred	0	5	1
Foreign:
Current	368	378	335
Deferred	(4)	130	109
Total	$ 352	$ 708	$ 990

Income Taxes (Effective Income

Income Taxes (Effective Income Tax Reconciliation) (Details) - USD ($) $ in Millions	3 Months Ended		12 Months Ended
	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Statutory Federal tax rate			21.00%	21.00%	35.00%
State taxes, net of Federal tax benefit			6.00%	2.00%	(7.00%)
Taxes on foreign earnings			12.00%	9.00%	0.00%
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act, Percent				0.06	0.90
Valuation allowance			(2.00%)	(2.00%)	10.00%
Change in tax law			(1.00%)	6.00%	90.00%
Income Tax Expense (Benefit)			$ 352	$ 708	$ 990
Other—net			(1.00%)	(1.00%)	0.00%
Effective tax rate			35.00%	35.00%	128.00%
Guacolda Affiliate [Member]
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income Tax Expense (Benefit)			$ 19
UNITED STATES
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Statutory Federal tax rate			21.00%
Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Income Tax Expense			$ 124
Tax Cuts and Jobs Act, Income Tax Expense (Benefit)	$ 161	$ 33		$ 194
Tax Cuts and Jobs Act, Measurement Period Adjustment, Income Tax Expense (Benefit)	$ 77		17	$ 77
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act, Percent				0.09	0.88
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability				$ (38)
Non-US [Member]
Effective Income Tax Rate Reconciliation, Amount [Abstract]
Income Tax Expense (Benefit)			$ 26	$ 35	$ 26

Income Taxes (Income Tax Payabl

Income Taxes (Income Tax Payables and Income Tax Receivables) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Income Tax Disclosure [Abstract]
Income taxes receivable—current	$ 131	$ 163
Income Taxes Receivable, Noncurrent	10	8
Total income taxes receivable	141	171
Income taxes payable—current	172	210
Income taxes payable—noncurrent	0	7
Total income taxes payable	$ 172	$ 217

Income Taxes (Deferred Tax Asse

Income Taxes (Deferred Tax Assets and Deferred Tax Liabilities) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Deferred Tax Liabilities:
Differences between book and tax basis of property	$ (1,426)	$ (1,418)
Other taxable temporary differences	(287)	(243)
Deferred Tax Liabilities, Gross	(1,713)	(1,661)
Deferred Tax Assets:
Operating loss carryforwards	1,060	1,066
Capital loss carryforwards	57	52
Bad debt and other book provisions	74	62
Tax credit carryforwards	33	55
Other deductible temporary differences	256	111
Total gross deferred tax asset	1,480	1,346
Less: valuation allowance	(824)	(868)
Total net deferred tax asset	656	478
Total deferred tax liability	$ (1,057)	$ (1,183)

Income Taxes (Income (Loss) fro

Income Taxes (Income (Loss) from Continuing Operations Before Income Tax) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income (Loss) from Continuing Operations before Equity Method Investments, Income Taxes, Extraordinary Items, Noncontrolling Interest [Abstract]
U.S.	$ (57)	$ (218)	$ (511)
Non-U.S.	1,058	2,236	1,282
INCOME FROM CONTINUING OPERATIONS BEFORE TAXES AND EQUITY IN EARNINGS OF AFFILIATES	$ 1,001	$ 2,018	$ 771

Income Taxes (Unrecognized Tax

Income Taxes (Unrecognized Tax Benefits) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Tax Contingency [Line Items]
Unrecognized Tax Benefits, Interest on Income Taxes Accrued	$ 2	$ 4
Unrecognized Tax Benefits, Period Increase (Decrease)	$ (2)	$ (3)	$ 1
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%	21.00%	35.00%
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 448	$ 446	$ 332
Effective Income Tax Rate Reconciliation, Percent	35.00%	35.00%	128.00%
Reconciliation of Unrecognized Tax Benefits, Excluding Amounts Pertaining to Examined Tax Returns [Roll Forward]
Beginning balance	$ 463	$ 348
Additions for current year tax positions	6	2	$ 0
Additions for tax positions of prior years	4	146	2
Reductions for tax positions of prior years	(5)	(26)	(5)
Lapse of statute of limitations	(3)	(7)	(1)
Ending balance	465	463	348
Unrecognized Tax Benefits, Income Tax Penalties Accrued	0	0
Unrecognized Tax Benefits, Income Tax Penalties Expense	$ 0	$ 0	$ 0
UNITED STATES
Income Tax Contingency [Line Items]
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent	21.00%
Unrecognized Tax Benefits that Would Impact Effective Tax Rate	$ 161

Income Taxes (Narrative) (Detai

Income Taxes (Narrative) (Details) - USD ($)	3 Months Ended			12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2015
Income Tax Disclosures [Line Items]
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act, Percent					0.06	0.90
Deferred Tax Liabilities, Undistributed Foreign Earnings	$ 0			$ 0
Undistributed Earnings of Foreign Subsidiaries	4,000,000,000			$ 4,000,000,000
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent				12.00%	9.00%	0.00%
Effective tax rate				35.00%	35.00%	128.00%
Increase (decrease) in valuation allowance				$ (44,000,000)	$ (120,000,000)
Valuation allowance	(824,000,000)	$ (868,000,000)		(824,000,000)	(868,000,000)
Income tax expense				$ (352,000,000)	$ (708,000,000)	$ (990,000,000)
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				21.00%	21.00%	35.00%
Tax benefits related to tax status of operations in countries subject to reduced tax rates per share (in dollars per share)				$ 0.02	$ 0.04	$ 0.03
Unrecognized Tax Benefits, Income Tax Penalties and Interest Accrued:
Interest on income taxes accrued	2,000,000	4,000,000		$ 2,000,000	$ 4,000,000
Unrecognized Tax Benefits, Income Tax Penalties Accrued	0	0		0	0
Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense:
Unrecognized Tax Benefits, Income Tax Penalties Expense				0	0	$ 0
Uncertain Tax Positions Additional Disclosures:
Unrecognized tax benefits	465,000,000	463,000,000		465,000,000	463,000,000	348,000,000	$ 352,000,000
Unrecognized tax benefits that would impact effective tax rate	448,000,000	446,000,000		448,000,000	446,000,000	332,000,000
Unrecognized tax benefits that would impact effective tax rate portion with attributes warranting full valuation allowance	33,000,000	33,000,000		33,000,000	33,000,000	29,000,000
Unrecognized Tax benefits Anticipated To Result In Ne Decrease of Unrecognized Tax Benefits WIthin 12 Months of Balance Sheet Date Minimum	0			0
Unrecognized tax benefits anticipated to result in net decrease of unrecognized tax benefits within 12 months, maximum	10,000,000			10,000,000
Federal
Income Tax Disclosures [Line Items]
Operating loss carryforwards	800,000,000			800,000,000
State and Local Jurisdiction
Income Tax Disclosures [Line Items]
Operating loss carryforwards	6,900,000,000			6,900,000,000
Foreign Tax Authority
Income Tax Disclosures [Line Items]
Operating loss carryforwards	2,700,000,000			2,700,000,000
General Business Tax Credit Carryforward
Income Tax Disclosures [Line Items]
Tax credit carryforward	23,000,000			23,000,000
Investment Tax Credit Carryforward [Member]
Income Tax Disclosures [Line Items]
Tax credit carryforward	8,000,000			8,000,000
Foreign Jurisdictions
Income Tax Disclosures [Line Items]
Tax credit carryforward	14,000,000			14,000,000
2021 Expiration | Foreign Jurisdictions
Income Tax Disclosures [Line Items]
Tax credit carryforward	12,000,000			12,000,000
Non-US [Member]
Income Tax Disclosures [Line Items]
Income tax expense				(26,000,000)	(35,000,000)	(26,000,000)
VIET NAM
Income Tax Disclosures [Line Items]
Income tax expense				$ (13,000,000)	$ (19,000,000)	$ (13,000,000)
Tax benefits related to tax status of operations in countries subject to reduced tax rates per share (in dollars per share)				$ 0.01	$ 0.01	$ 0.01
Guacolda Affiliate [Member]
Income Tax Disclosures [Line Items]
Effective Income Tax Rate Reconciliation, Foreign Income Tax Rate Differential, Percent				(1.00%)
UNITED STATES
Income Tax Disclosures [Line Items]
Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Income Tax Expense				$ 124,000,000
Effective Income Tax Rate Reconciliation, Tax Cuts and Jobs Act, Percent					0.09	0.88
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent						5.00%
Tax Cuts and Jobs Act, Income Tax Expense (Benefit)		161,000,000	$ 33,000,000		$ 194,000,000
Tax Cuts and Jobs Act, Change in Tax Rate, Deferred Tax Liability, Income Tax Benefit				852,000,000	869,000,000
Tax Cuts and Jobs Act, Change in Tax Rate, Deferred Tax Asset, Income Tax Expense				(7,000,000)
Effective Income Tax Rate Reconciliation, Repatriation of Foreign Earnings, Amount					38,000,000
Tax Cuts and Jobs Act, Transition Tax for Accumulated Foreign Earnings, Liability	31,000,000			$ 31,000,000
Effective Income Tax Rate Reconciliation, at Federal Statutory Income Tax Rate, Percent				21.00%
Tax Cuts and Jobs Act, Measurement Period Adjustment, Income Tax Expense (Benefit)		$ 77,000,000		$ 17,000,000	$ 77,000,000
Uncertain Tax Positions Additional Disclosures:
Unrecognized tax benefits that would impact effective tax rate	161,000,000			$ 161,000,000
ARGENTINA
Income Tax Disclosures [Line Items]
Effective Income Tax Rate Reconciliation, Change in Enacted Tax Rate, Percent						3.00%
Effective tax rate					35.00%
Income tax expense	$ (4,000,000)				$ (21,000,000)
ARGENTINA | FY 2018 - 2019 [Member]
Income Tax Disclosures [Line Items]
Effective tax rate					30.00%
ARGENTINA | FY 2020 and beyond [Member]
Income Tax Disclosures [Line Items]
Effective tax rate					25.00%
ARGENTINA | FY 2020-2021 [Domain]
Income Tax Disclosures [Line Items]
Effective tax rate				30.00%
ARGENTINA | FY 2022 and beyond [Domain]
Income Tax Disclosures [Line Items]
Effective tax rate				25.00%

Discontinued Operations and H_2

Discontinued Operations and Held-For-Sale Businesses (Schedule of Disposal Groups, Including Discontinued Operations) (Details) - USD ($) $ in Millions		3 Months Ended					12 Months Ended
		Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash Provided by (Used in) Operating Activities, Discontinued Operations									$ 164
Disposal Group, Including Discontinued Operation, Revenue									3,320
Income tax expense							$ 0	$ 2	21
Income (loss) from operations of discontinued businesses, after income tax							0	(9)	(18)
Net loss from disposal and impairments of discontinued businesses, after income tax							1	225	(611)
Disposal Group, Including Discontinued Operation, Costs of Goods Sold									(3,151)
Disposal Group, Including Discontinued Operation, Other Expense	[1]								(166)
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax									(608)
Discontinued Operation, Tax Effect of Discontinued Operation									(21)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent							1	218	(654)
Cash Provided by (Used in) Investing Activities, Discontinued Operations									(288)
Asset Impairment Charges							277	355	537
Other Asset Impairment Charges		$ 69	$ 116	$ 42	$ 74	$ 92	$ 185	$ 208	537
Eletropaulo Subsidiary [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Net loss from disposal and impairments of discontinued businesses, after income tax						$ 199
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax									$ (633)
[1]	Includes a loss contingency recognized by our equity method investment in discontinued operations.

Discontinued Operations and H_3

Discontinued Operations and Held-For-Sale Businesses (Narrative) (Details) - USD ($) $ in Millions		3 Months Ended						12 Months Ended
		Dec. 31, 2019	Jun. 30, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Dec. 31, 2017	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Cash Provided by (Used in) Operating Activities, Discontinued Operations										$ 164
Cash Provided by (Used in) Investing Activities, Discontinued Operations										(288)
Disposal Group, Including Discontinued Operation, Revenue										3,320
Disposal Group, Including Discontinued Operation, Costs of Goods Sold										(3,151)
Asset Impairment Charges								$ 277	$ 355	537
Net loss from disposal and impairments of discontinued operations								(1)	(225)	611
Other Asset Impairment Charges		$ 69	$ 116	$ 42	$ 74	$ 92		185	208	537
Income (Loss) from Continuing Operations Attributable to Parent								(302)	(985)	507
Impairment Expense Pre Tax Total										(611)
Disposal Group, Including Discontinued Operation, Other Expense	[1]									(166)
Discontinued Operation, Income (Loss) from Discontinued Operation During Phase-out Period, before Income Tax										3
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax										(608)
Income (loss) on discontinued operations, before tax, attributable to Noncontrolling interest										(25)
Income (loss) from discontinued operations, before income tax, attributable to parent										(633)
Discontinued Operation, Tax Effect of Discontinued Operation										(21)
Income (Loss) from Discontinued Operations, Net of Tax, Attributable to Parent								$ 1	$ 218	(654)
Borsod [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued Operation Deferred Gain on Disposal				26
Disposal Group, Including Discontinued Operation, Foreign Currency Translation Gains (Losses)				$ 20
Eletropaulo Subsidiary [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Discontinued Operation, Equity Method Investment Retained after Disposal, Ownership Interest after Disposal							17.00%
Deconsolidation, Gain (Loss), Amount										(611)
Proceeds from divestiture of business						340
Net loss from disposal and impairments of discontinued operations						(199)
Disposal Group, Including Discontinued Operation, Foreign Currency Translation Gains (Losses)										(455)
Disposal Group, Including Discontinued Operation, Pension Gains (Losses)										(243)
Impairment Expense Pre Tax Total						$ 243
Discontinued Operation, Income (Loss) from Discontinued Operation, before Income Tax										$ (633)
[1]	Includes a loss contingency recognized by our equity method investment in discontinued operations.

Acquisitions and Dispositions (

Acquisitions and Dispositions (Details) - USD ($) $ in Millions	Jun. 13, 2019	May 22, 2019	Apr. 07, 2017	Jun. 25, 2014	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019		Dec. 31, 2018		Dec. 31, 2017	Jul. 01, 2019	Mar. 20, 2018
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Gain (Loss) on Disposition of Business					$ 128	$ (21)	$ 89	$ 788	$ 28		$ 984		$ (52)
Proceeds from Divestiture of Businesses and Interests in Affiliates									178		2,020		108
Income (Loss) from Continuing Operations Attributable to Parent									(302)		(985)		507
Dispositions and Held-for-Sales Businesses
Equity method investment														$ 98
Asset Retirement Obligation, Revision of Estimate									58		24
Masinloc Subsidiary [Member]
Dispositions and Held-for-Sales Businesses
Sale of Stock, Consideration Received on Transaction				$ 436
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Redondo Beach [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Assets Carrying Amount Disclosure Nonrecurring									24
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Jordan [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Income (Loss) from Individually Significant Component Disposed of or Held-for-sale, Excluding Discontinued Operations, Attributable to Parent, before Income Tax									19		10		11
Proceeds from Divestiture of Businesses and Interests in Affiliates									86
Capital Contribution to Project									5
Assets Carrying Amount Disclosure Nonrecurring									$ 153
Dispositions and Held-for-Sales Businesses
Ownership interest sold									36.00%
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Income (Loss) from Individually Significant Component Disposed of or Held-for-sale, Excluding Discontinued Operations, Attributable to Parent, before Income Tax									$ 46		161		275
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Kilroot and Ballylumford [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Income (Loss) from Individually Significant Component Disposed of or Held-for-sale, Excluding Discontinued Operations, Attributable to Parent, before Income Tax									(1)		35		38
Gain (Loss) on Disposition of Business	$ 33
Proceeds from Divestiture of Businesses and Interests in Affiliates	$ 118
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | DPL Subsidiary [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Income (Loss) from Individually Significant Component Disposed of or Held-for-sale, Excluding Discontinued Operations, Attributable to Parent, before Income Tax									52	[1]	77	[1],[2]	17
Asset Retirement Obligation, Cash Paid to Settle									51
Dispositions and Held-for-Sales Businesses
Pre-tax gain on disposal									20
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Shady Point [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Income (Loss) from Individually Significant Component Disposed of or Held-for-sale, Excluding Discontinued Operations, Attributable to Parent, before Income Tax									(5)		19		19
Proceeds from Divestiture of Businesses and Interests in Affiliates		$ 29
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Compania Transmisora del Norte Grande [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Gain (Loss) on Disposition of Business											126
Proceeds from Divestiture of Businesses and Interests in Affiliates											225
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Beckjord Facility [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Asset Retirement Obligation, Cash Paid to Settle								15
Dispositions and Held-for-Sales Businesses
Pre-tax gain on disposal								(12)
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Electrica Santiago (Gener ESSA) [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Gain (Loss) on Disposition of Business							70
Proceeds from Divestiture of Businesses and Interests in Affiliates							$ 287
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | DPL Peaking Generation [Domain]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Gain (Loss) on Disposition of Business								(2)
Proceeds from Divestiture of Businesses and Interests in Affiliates								239
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Masinloc Subsidiary [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Income (Loss) from Individually Significant Component Disposed of or Held-for-sale, Excluding Discontinued Operations, Attributable to Parent, before Income Tax									0		9		103
Gain (Loss) on Disposition of Business											772
Proceeds from Divestiture of Businesses and Interests in Affiliates								1,050
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Zimmer and Miami Fort [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Income (Loss) from Individually Significant Component Disposed of or Held-for-sale, Excluding Discontinued Operations, Attributable to Parent, before Income Tax									0		0		26
Gain (Loss) on Disposition of Business													13
Proceeds from Divestiture of Businesses and Interests in Affiliates													70
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Kazakhstan Hydro [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Income (Loss) from Individually Significant Component Disposed of or Held-for-sale, Excluding Discontinued Operations, Attributable to Parent, before Income Tax									0		0		33
Proceeds from Divestiture of Businesses and Interests in Affiliates													75
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Kazakhstan [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Gain (Loss) on Disposition of Business			$ (49)
Proceeds from Divestiture of Businesses and Interests in Affiliates			$ 24
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Other Subsidiaries [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Income (Loss) from Individually Significant Component Disposed of or Held-for-sale, Excluding Discontinued Operations, Attributable to Parent, before Income Tax									0		21		39
Disposal Group, Not Discontinued Operations [Member] | Advancion Energy Storage [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Gain (Loss) on Disposition of Business								$ 23
Masinloc Subsidiary [Member]
Dispositions and Held-for-Sales Businesses
Ownership interest sold				45.00%											51.00%
Divestiture of Businesses, Portion Contingent Upon Achievement of Certain Restructuring Efficiencies				$ 23									23
Kazakhstan Hydro [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Impairment of Long-Lived Assets to be Disposed of									0		0		$ 92
Dispositions and Held-for-Sales Businesses
Ownership interest sold													100.00%
Kazakhstan Hydro [Member] | Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | Kazakhstan Hydro [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Gain (Loss) on Disposition of Business													$ (33)
DPL Subsidiary [Member]
Dispositions and Held-for-Sales Businesses
Asset Retirement Obligation, Revision of Estimate									87		$ 32
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | DPL Peaking Generation [Domain]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Impairment of Long-Lived Assets to be Disposed of													109
Fair Value Less Costs To Sell													237
Assets Carrying Amount Disclosure Nonrecurring													346
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | Kazakhstan Hydro [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Impairment of Long-Lived Assets to be Disposed of													92
Fair Value Less Costs To Sell									92
Assets Carrying Amount Disclosure Nonrecurring									$ 190
Disposal Group, Held-for-sale, Not Discontinued Operations [Member] | DPL Subsidiary [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Impairment of Long-Lived Assets to be Disposed of													$ 66
[1]	After the retirement of Stuart and Killen in 2018, the Company entered into contracts to buy back all open capacity years for the plants at prices lower than the PJM capacity revenue prices. As such, the Company continued to earn capacity margin until the plants were transferred in December 2019.
[2]	Reductions in the asset retirement obligations for ash ponds and landfills at Stuart and Killen in 2018 resulted in a $32 million reduction to cost of sales. See Note 4 — Asset Retirement Obligations for further information.

Acquisitions Acquistions (Detai

Acquisitions Acquistions (Details) - USD ($) $ in Millions	3 Months Ended				12 Months Ended
	Mar. 31, 2020	Dec. 31, 2018	Sep. 30, 2018	Sep. 30, 2017	Dec. 31, 2019	Dec. 31, 2018		Dec. 31, 2017	Nov. 01, 2018	Mar. 31, 2018
Business Acquisition [Line Items]
Liquidation Basis of Accounting, Remeasurement, Gain (Loss) on Asset								$ 0
Project Financing Disbursed					$ 0	$ 119		$ 0
Distributed Energy [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Net of Cash Acquired						$ 23
Business Combination, Ownership Percentage in Acquiree		100.00%				100.00%
Business Combination, Equity Interest in Acquiree, Remeasurement Gain (Loss)		$ 5				$ (5)
Alto Sertao II [Member]
Business Acquisition [Line Items]
Business Combination, Consideration Transferred				$ 179
Business Combination, Recognized Identifiable Assets Acquired and Liabilities Assumed, Liabilities				346
Business Combination, Contingent Consideration, Liability										$ 18
Payments to Acquire Businesses, Net of Cash Acquired				$ 143
Payment for Contingent Consideration Liability, Financing Activities			$ 12
Na Pua Makani Power Partners [Member]
Business Acquisition [Line Items]
Business Acquisition, Percentage of Voting Interests Acquired									100.00%
Business Combination, Consideration Transferred		11				53
Business Combination, Contingent Consideration		$ 5				48
Liquidation Basis of Accounting, Remeasurement, Gain (Loss) on Asset					0	32	[1]
Guaimbe Solar Complex [Member]
Business Acquisition [Line Items]
Project Financing Disbursed						$ 119
Asset acquisition, additional cash paid			33
Asset Acquisition, Consideration Transferred			$ 152
Los Cururos [Member]
Business Acquisition [Line Items]
Asset Acquisition, Consideration Transferred					$ 143
Subsequent Event [Member] | Los Cururos [Member]
Business Acquisition [Line Items]
Payments to Acquire Businesses, Gross	$ 5
[1]	Related to the amendment of the Oahu purchase agreement. See Note 26 — Acquisitions for further information.

Earnings Per Share (Schedule of

Earnings Per Share (Schedule of Earnings Per Share, Basic and Diluted) (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Class of Stock [Line Items]
Income (Loss) from Continuing Operations, Net of Tax, Attributable to Parent									$ 302	$ 985	$ (507)
Weighted Average Number of Shares Outstanding, Basic (in shares)									664	662	660
Income (Loss) from Continuing Operations, Per Basic Share	$ (0.12)	$ 0.32	$ 0.02	$ 0.23	$ 0.15	$ 0.15	$ 0.15	$ 1.04	$ 0.46	$ 1.49	$ (0.77)
Weighted Average Number of Shares Outstanding, Diluted (in shares)									667	665	660
Income (Loss) from Continuing Operations, Per Diluted Share	$ (0.12)	$ 0.32	$ 0.02	$ 0.23	$ 0.15	$ 0.15	$ 0.15	$ 1.03	$ 0.45	$ 1.48	$ (0.77)
Restricted Stock Units (RSUs) [Member]
Class of Stock [Line Items]
Dilutive Securities, Effect on Basic Earnings Per Share, Options and Restrictive Stock Units									$ 0	$ 0	$ 0
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements (in shares)									3	3	0
Dilutive Securities Effect On Basic EPS, dilutive Restricted Stock Units, per diluted share									$ (0.01)	$ (0.01)	$ 0

Earnings Per Share (Narrative)

Earnings Per Share (Narrative) (Details) - shares shares in Millions	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share	2	7
RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share		4
Weighted Average [Member] | RSUs
Antidilutive Securities Excluded from Computation of Earnings Per Share [Line Items]
Antidilutive securities excluded from computation of earnings per share		2

Risks And Uncertainties (Detail

Risks And Uncertainties (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)segmentbusinessinteger	Dec. 31, 2018USD ($)
Unusual Risk or Uncertainty [Line Items]
Number of Reportable Segments | segment	4
Segment Reporting, Additional Information about Entity's Reportable Segments | business	2
Cash and Cash Equivalents, at Carrying Value	$ 1,029	$ 1,166
Percentage of Total Revenue Non-U.S.	68.00%
Goodwill, Gross	$ 3,670	3,792
Number Of Single Customers That Accounted For Ten Percent Or More Of Total Revenue | integer	0
Cash and Cash Equivalents [Member]
Unusual Risk or Uncertainty [Line Items]
Cash and Cash Equivalents, at Carrying Value	$ 1,000
Operating Segments [Member] | ANDES [Member]
Unusual Risk or Uncertainty [Line Items]
Reporting Unit, Percentage of Fair Value in Excess of Carrying Amount	3.00%
Goodwill, Gross	$ 868	$ 868

Related Party Transactions (Sch

Related Party Transactions (Schedule of related Party Transactions) (Details) - Affiliated Entity - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Related Party Transaction [Line Items]
Interest Income	$ 21	$ 14	$ 8
Interest expense	74	54	36
Electricity, Generation [Member]
Related Party Transaction [Line Items]
Revenue—Non-Regulated	1,544	1,533	1,297
Cost of Sales—Non-Regulated	$ 531	$ 342	$ 220

Related Party Transactions (S_2

Related Party Transactions (Schedule of Related Party Receivables Payables) (Details) - USD ($) $ in Millions		Dec. 31, 2019	Dec. 31, 2018
Affiliated Entity [Member]
Related Party Transaction [Line Items]
Receivables from Related Parties		$ 370	$ 371
Accounts and notes payable to related parties (1)	[1]	1,976	754
Mong Duong Finance Holdings B.V._Related Party [Member]
Related Party Transaction [Line Items]
Accounts and notes payable to related parties (1)		1,100
Strabag_EPC Contractor_Related Party [Member]
Related Party Transaction [Line Items]
Accounts and notes payable to related parties (1)		287	165
Banco General_Related Party [Member]
Related Party Transaction [Line Items]
Accounts and notes payable to related parties (1)		$ 415	$ 382
[1]	Includes $1.1 billion of debt to Mong Duong Finance Holdings B.V., an SPV accounted for as an equity affiliate as of December 31, 2019 (See Note 11 — Debt ); $415 million and $382 million of debt to Banco General S.A., a bank in Panama where our minority partner in Colon is part of its board of directors as of December 31, 2019 and 2018, respectively; and $287 million and $165 million of debt to Strabag, our EPC contractor and minority partner in Alto Maipo as of December 31, 2019 and 2018, respectively.

Selected Quarterly Financial _3

Selected Quarterly Financial Data (Details) - USD ($) $ / shares in Units, $ in Millions	Dec. 06, 2019	Dec. 31, 2019		Sep. 30, 2019	Jun. 30, 2019		Mar. 31, 2019	Dec. 31, 2018		Sep. 30, 2018		Jun. 30, 2018		Mar. 31, 2018		Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Gain (Loss) on Disposition of Business								$ 128		$ (21)		$ 89		$ 788		$ 28	$ 984	$ (52)
Other Asset Impairment Charges		$ 69			$ 116			42		74		92				185	208	537
Revenues		2,431		$ 2,625	2,483		$ 2,650	2,622		2,837		2,537		2,740		10,189	10,736	10,530
Net equity in earnings (losses) of affiliates		(175)														(172)	39	71
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax																1	225	(611)
Selected Quarterly Financial Information [Abstract]
Operating margin		560		701	502		586	646		671		600		656		2,349	2,573	2,465
Income (Loss) from Continuing Operations, net of Tax		(120)	[1]	298	66	[1]	233	155	[2]	192	[2]	224	[2]	778	[2]	477	1,349	(148)
Income (Loss) from Discontinued Operations, Net of Tax, Including Portion Attributable to Noncontrolling Interest		0		0	1		0	26		(1)		192	[3]	(1)
NET INCOME (LOSS)		(120)		298	67		233	181		191		416		777		478	1,565	(777)
Net income (loss) attributable to The AES Corporation		$ (78)		$ 210	$ 17		$ 154	$ 128		$ 101		$ 290		$ 684		$ 303	$ 1,203	$ (1,161)
Basic earnings (loss) per share:
Income (loss) from continuing operations attributable to The AES Corporation common stockholders, net of tax		$ (0.12)		$ 0.32	$ 0.02		$ 0.23	$ 0.15		$ 0.15		$ 0.15		$ 1.04		$ 0.46	$ 1.49	$ (0.77)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Basic Share		0		0	0		0	0.04		0		0.29		0		0	0.33	(0.99)
NET INCOME ATTRIBUTABLE TO THE AES CORPORATION COMMON STOCKHOLDERS		(0.12)		0.32	0.02		0.23	0.19		0.15		0.44		1.04		0.46	1.82	(1.76)
Diluted earnings (loss) per share:
Income (loss) from continuing operations attributable to The AES Corporation common stockholders, net of tax		(0.12)		0.32	0.02		0.23	0.15		0.15		0.15		1.03		0.45	1.48	(0.77)
Income (Loss) from Discontinued Operations and Disposal of Discontinued Operations, Net of Tax, Per Diluted Share		0		0	0		0	0.04		0		0.29		0		0	0.33	(0.99)
Earnings Per Share, Diluted		(0.12)		0.32	0.02		0.23	0.19		0.15		0.44		1.03		0.45	1.81	(1.76)
Dividends declared per common share	$ 0.1433	$ 0.28		$ 0.14	$ 0		$ 0.14	$ 0.27		$ 0.13		$ 0		$ 0.13		$ 0.5528	$ 0.5300	$ 0.4900
OPGC Affiliate [Member]
Equity Method Investment, Other than Temporary Impairment		$ 92
Guacolda Affiliate [Member]
Equity Method Investment, Other than Temporary Impairment																	$ 144
Eletropaulo Subsidiary [Member]
Discontinued Operation, Gain (Loss) on Disposal of Discontinued Operation, Net of Tax												$ 199
Deconsolidation, Gain (Loss), Amount																		$ (611)
UNITED STATES
Tax Cuts and Jobs Act, Income Tax Expense (Benefit)								$ 161		$ 33							194
Tax Cuts and Jobs Act, Measurement Period Adjustment, Income Tax Expense (Benefit)								$ (77)								$ (17)	(77)
Income Tax Expense (Benefit), Continuing Operations, Adjustment of Deferred Tax (Asset) Liability																	$ (38)
[1]	Includes pre-tax impairment expense of $116 million and $69 million , in the second and fourth quarters of 2019 , respectively (See Note 22 — Asset Impairment Expense ), other-than-temporary impairment of OPGC of $92 million and net equity in losses of affiliates, primarily at Guacolda, of $175 million , in the fourth quarter of 2019 (See Note 8 — Investments in and Advances to Affiliates ).
[2]	Includes pre-tax gains on sales of business interests of $788 million , $89 million and $128 million , in the first, second and fourth quarters of 2018 , respectively, and pre-tax losses of $21 million in the third quarter of 2018 (See Note 25 — Held-for-Sale and Dispositions ), pre-tax impairment expense of $92 million , $74 million and $42 million , in the second, third and fourth quarters of 2018 , respectively (See Note 22 — Asset Impairment Expense ), other-than-temporary impairment of Guacolda of $144 million in the fourth quarter of 2018 (See Note 8 — Investments in and Advances to Affiliates ), SAB 118 charges to finalize the provisional estimate of one-time transition tax on foreign earnings of $33 million and $161 million in the third and fourth quarters of 2018 , respectively, and a SAB 118 income tax benefit to finalize the provisional estimate of remeasurement of deferred tax assets and liabilities to the lower corporate tax rate of $77 million in the fourth quarter of 2018 (See Note 23 — Income Taxes ).
[3]	Includes gain on sale of Eletropaulo of $199 million in the second quarter of 2018 (See Note 24 — Discontinued Operations ).

Schedule I - Condensed Financ_3

Schedule I - Condensed Financial Information of Parent (Balance Sheet) (Details) - USD ($)	Dec. 31, 2019	Jan. 01, 2019	Dec. 31, 2018	Jun. 30, 2018	Jan. 01, 2018	Dec. 31, 2017	Dec. 31, 2015
Current Assets:
Cash and cash equivalents	$ 1,029,000,000		$ 1,166,000,000
Restricted cash	336,000,000		370,000,000
Total current assets	5,231,000,000		5,015,000,000
Investment in and advances to subsidiaries and affiliates	966,000,000		1,114,000,000			$ 1,197,000,000
Office Equipment:
Cost	25,383,000,000		25,242,000,000
Accumulated depreciation	(8,505,000,000)		(8,227,000,000)
Property, plant and equipment, net	22,574,000,000		21,396,000,000
Other Assets:
Deferred income taxes	156,000,000		97,000,000		$ 106,000,000	130,000,000
Other assets	1,635,000,000	$ 1,767,000,000	1,514,000,000
Total other assets	5,843,000,000		6,110,000,000
TOTAL ASSETS	33,648,000,000		32,521,000,000			33,112,000,000
Current Liabilities:
Accounts payable	1,311,000,000		1,329,000,000
Accrued and other liabilities	1,021,000,000	989,000,000	962,000,000
Total current liabilities	5,096,000,000		4,399,000,000
Long-term Liabilities:
Other long-term liabilities	2,917,000,000	$ 2,949,000,000	2,723,000,000
Total noncurrent liabilities	22,435,000,000		21,639,000,000
Stockholders' equity:
Common stock	8,000,000		8,000,000	$ 16.38
Additional paid-in capital	7,776,000,000		8,154,000,000
Accumulated deficit	(692,000,000)		(1,005,000,000)		(2,209,000,000)	(2,276,000,000)
Accumulated other comprehensive loss	(2,229,000,000)		(2,071,000,000)		$ (1,857,000,000)	(1,876,000,000)
Treasury stock	(1,867,000,000)		(1,878,000,000)
Total AES Corporation stockholders’ equity	2,996,000,000		3,208,000,000
TOTAL LIABILITIES AND EQUITY	33,648,000,000		32,521,000,000
Parent Company [Member]
Current Assets:
Cash and cash equivalents	11,000,000		19,000,000			$ 10,000,000	$ 112,000,000
Accounts and notes receivable from subsidiaries	238,000,000		285,000,000
Prepaid expenses and other current assets	35,000,000		31,000,000
Total current assets	284,000,000		335,000,000
Investment in and advances to subsidiaries and affiliates	6,782,000,000		6,834,000,000
Office Equipment:
Cost	27,000,000		27,000,000
Accumulated depreciation	(20,000,000)		(19,000,000)
Property, plant and equipment, net	7,000,000		8,000,000
Other Intangible Assets, Net	1,000,000		3,000,000
Other Assets:
Deferred financing costs, net of accumulated amortization of $5 and $4, respectively	5,000,000		4,000,000
Deferred income taxes	14,000,000		24,000,000
Other assets	16,000,000		2,000,000
Total other assets	36,000,000		33,000,000
TOTAL ASSETS	7,109,000,000		7,210,000,000
Current Liabilities:
Accounts payable	20,000,000		15,000,000
Accounts and notes payable to subsidiaries	339,000,000		74,000,000
Accrued and other liabilities	221,000,000		206,000,000
Senior notes payable—current portion	5,000,000		5,000,000
Total current liabilities	585,000,000		300,000,000
Long-term Liabilities:
Senior notes payable	3,391,000,000		3,650,000,000
Accounts and notes payable to subsidiaries	28,000,000		28,000,000
Other long-term liabilities	109,000,000		24,000,000
Total noncurrent liabilities	3,528,000,000		3,702,000,000
Stockholders' equity:
Common stock	8,000,000		8,000,000
Additional paid-in capital	7,776,000,000		8,154,000,000
Accumulated deficit	(692,000,000)		(1,005,000,000)
Accumulated other comprehensive loss	(2,229,000,000)		(2,071,000,000)
Treasury stock	(1,867,000,000)		(1,878,000,000)
Total AES Corporation stockholders’ equity	2,996,000,000		3,208,000,000
TOTAL LIABILITIES AND EQUITY	$ 7,109,000,000		$ 7,210,000,000

Schedule I - Condensed Financ_4

Schedule I - Condensed Financial Information of Parent (Balance Sheet Parenthetical) (Details) - USD ($) $ in Millions	Dec. 31, 2019	Dec. 31, 2018
Parent Company
Condensed Financial Statements, Captions [Line Items]
Deferred financing costs, accumulated amortization	$ 5	$ 4

Schedule I - Condensed Financ_5

Schedule I - Condensed Financial Information of Parent Schedule I - Condensed Financial Information of Parent (Statement of Operations) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Income Statements, Captions [Line Items]
Interest income									$ 318	$ 310	$ 244
General and administrative expenses									(196)	(192)	(215)
Other income									145	72	120
Other expense									(80)	(58)	(58)
Loss on extinguishment of debt									(169)	(188)	(68)
Interest expense									(1,050)	(1,056)	(1,170)
Income (loss) before income taxes									(277)	(509)	(521)
Income tax (expense)									(352)	(708)	(990)
NET INCOME (LOSS) ATTRIBUTABLE TO THE AES CORPORATION	$ (78)	$ 210	$ 17	$ 154	$ 128	$ 101	$ 290	$ 684	303	1,203	(1,161)
Parent Company
Condensed Income Statements, Captions [Line Items]
Revenue from subsidiaries and affiliates									30	36	28
Equity in earnings of subsidiaries and affiliates									674	1,909	630
Interest income									53	39	49
General and administrative expenses									(148)	(142)	(158)
Other income									1	25	5
Other expense									(103)	0	(554)
Loss on extinguishment of debt									(5)	(171)	(92)
Interest expense									(197)	(220)	(317)
Income (loss) before income taxes									305	1,476	(409)
Income tax (expense)									(2)	(273)	(752)
NET INCOME (LOSS) ATTRIBUTABLE TO THE AES CORPORATION									$ 303	$ 1,203	$ (1,161)

Schedule I - Condensed Financ_6

Schedule I - Condensed Financial Information of Parent (Statement of Comprehensive Income) (Details) - USD ($) $ in Millions	3 Months Ended								12 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items]
NET INCOME (LOSS) ATTRIBUTABLE TO THE AES CORPORATION	$ (78)	$ 210	$ 17	$ 154	$ 128	$ 101	$ 290	$ 684	$ 303	$ 1,203	$ (1,161)
Foreign currency translation activity:
Foreign currency translation adjustments, net of income tax benefit of $1, $2 and $11, respectively									(33)	(161)	(9)
Reclassification to earnings, net of $0 income tax for all periods									23	(21)	643
Total foreign currency translation adjustments									(10)	(182)	634
Derivative activity:
Change in derivative fair value, net of income tax benefit of $53, $16 and $13, respectively									(265)	(67)	(12)
Reclassification to earnings, net of income tax benefit (expense) of $(4), $(13) and $1, respectively									42	93	50
Total change in fair value of derivatives									(223)	26	38
Pension activity:
Prior service cost for the period, net of income tax expense of $0, $1 and $1, respectively									1	(2)	2
Change in pension adjustments due to net actuarial gain (loss) for the period, net of income tax benefit (expense) of $6, $(1) and $6, respectively									(23)	(1)	(21)
Reclassification of earnings, net of income tax expense of $13, $2 and $126, respectively									(28)	(8)	(266)
Total pension adjustments									6	5	247
OTHER COMPREHENSIVE INCOME (LOSS)									(227)	(151)	919
COMPREHENSIVE INCOME (LOSS)									251	1,414	142
Parent Company
Condensed Financial Statements, Captions [Line Items]
NET INCOME (LOSS) ATTRIBUTABLE TO THE AES CORPORATION									303	1,203	(1,161)
Foreign currency translation activity:
Foreign currency translation adjustments, net of income tax benefit of $1, $2 and $11, respectively									(23)	(214)	18
Reclassification to earnings, net of $0 income tax for all periods									23	(21)	643
Total foreign currency translation adjustments									0	(235)	661
Derivative activity:
Change in derivative fair value, net of income tax benefit of $53, $16 and $13, respectively									(202)	(64)	(14)
Reclassification to earnings, net of income tax benefit (expense) of $(4), $(13) and $1, respectively									36	78	37
Total change in fair value of derivatives									(166)	14	23
Pension activity:
Prior service cost for the period, net of income tax expense of $0, $1 and $1, respectively									1	(2)	1
Change in pension adjustments due to net actuarial gain (loss) for the period, net of income tax benefit (expense) of $6, $(1) and $6, respectively									(16)	2	(20)
Reclassification of earnings, net of income tax expense of $13, $2 and $126, respectively									27	7	248
Total pension adjustments									12	7	229
OTHER COMPREHENSIVE INCOME (LOSS)									(154)	(214)	913
COMPREHENSIVE INCOME (LOSS)									$ 149	$ 989	$ (248)

Schedule I - Condensed Financ_7

Schedule I - Condensed Financial Information of Parent (Statement of Comprehensive Income Parenthetical) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Financial Statements, Captions [Line Items]
Foreign currency translation adjustments, income tax benefit (expense)	$ 1	$ 2	$ 17
Foreign currency, reclassification to earnings, income tax benefit (expense)	0	0	0
Change in derivative fair value, income tax benefit (expense)	(74)	(27)	(10)
Derivative reclassification to earnings, income tax benefit (expense)	12	24	1
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Tax	0	(1)	1
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax	(10)	(1)	(6)
Pension, amortization of net actuarial loss, income tax benefit (expense)	13	2	135
Parent Company
Condensed Financial Statements, Captions [Line Items]
Foreign currency translation adjustments, income tax benefit (expense)	1	2	11
Foreign currency, reclassification to earnings, income tax benefit (expense)	0	0	0
Change in derivative fair value, income tax benefit (expense)	53	16	13
Derivative reclassification to earnings, income tax benefit (expense)	(4)	(13)	1
Other Comprehensive (Income) Loss, Defined Benefit Plan, Prior Service Cost (Credit), Tax	0	(1)	(1)
Other Comprehensive Income (Loss), Defined Benefit Plan, Gain (Loss) Arising During Period, Tax	6	(1)	6
Pension, amortization of net actuarial loss, income tax benefit (expense)	$ (13)	$ (2)	$ (126)

Schedule I - Condensed Financ_8

Schedule I - Condensed Financial Information of Parent (Statement of Cash Flows) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	$ 2,466	$ 2,343	$ 2,504
Investing Activities:
Purchase of short term investments, net	(192)	(66)	(609)
Net cash used in investing activities	(2,721)	(505)	(2,599)
Financing Activities:
(Repayments) Borrowings under the revolver, net	2,026	1,865	2,156
Common stock dividends paid	(362)	(344)	(317)
Payments for deferred financing costs	(126)	(39)	(100)
Payments to Noncontrolling Interests	(427)	(340)	(424)
Proceeds from (Payments for) Other Financing Activities	120	101	42
Net cash provided by (used in) financing activities	(86)	(1,643)	43
Effect of exchange rate changes on cash	(18)	(54)	8
Cash and cash equivalents, beginning	1,166
Cash and cash equivalents, ending	1,029	1,166
SUPPLEMENTAL DISCLOSURES:
Cash payments for interest, net of amounts capitalized	(946)	(1,003)	(1,196)
Cash payments for income taxes, net of refunds	(363)	(370)	(377)
Parent Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Net cash provided by operating activities	583	409	148
Investing Activities:
Proceeds from the sale of business interests, net of expenses	196	1,222	0
Investment in and net advances to subsidiaries	(596)	(216)	(339)
Return of capital	411	242	243
Additions to property, plant and equipment	(8)	(13)	(13)
Net cash used in investing activities	3	1,235	(109)
Financing Activities:
(Repayments) Borrowings under the revolver, net	180	(207)	207
Borrowings of notes payable and other coupon bearing securities	0	1,000	1,025
Repayments of notes payable and other coupon bearing securities	(450)	(1,933)	(1,353)
Loans from (Repayments to) subsidiaries	40	(143)	309
Proceeds from issuance of common stock	6	7	1
Common stock dividends paid	(362)	(344)	(317)
Payments for deferred financing costs	(3)	(11)	(12)
Proceeds from (Payments for) Other Financing Activities	(4)	(5)	(7)
Net cash provided by (used in) financing activities	(593)	(1,636)	(147)
Effect of exchange rate changes on cash	(1)	1	6
Total increase (decrease) in cash, cash equivalents and restricted cash	(8)	9	(102)
Cash and cash equivalents, beginning	19	10
Cash and cash equivalents, ending	11	19	10
SUPPLEMENTAL DISCLOSURES:
Cash payments for interest, net of amounts capitalized	192	232	282
Cash payments for income taxes, net of refunds	$ (5)	$ 10	$ 2

Schedule I - Condensed Financ_9

Schedule I - Condensed Financial Information of Parent (Senior Notes and Junior Subordinated Notes) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	$ 3,396	$ 3,655
Less: Current maturities	(5)	(5)
Recourse Debt Non Current	3,391	$ 3,650
Unamortized (discounts)/premiums & debt issuance (costs)
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	$ (22)
Recourse Debt | LIBOR | Senior Secured Term Loan due 2022 [Member]
Condensed Financial Statements, Captions [Line Items]
Basis spread on variable rate	1.75%	1.75%
Recourse Debt | LIBOR | Revolving Credit Facility [Member]
Condensed Financial Statements, Captions [Line Items]
Basis spread on variable rate	1.75%	1.75%
Parent Company
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	$ 3,396
Parent Company | Unamortized (discounts)/premiums & debt issuance (costs)
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	(22)	$ (31)
Parent Company | Recourse Debt | Senior Secured Term Loan due 2022 [Member]
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	$ 18	366
Parent Company | Recourse Debt | 4.5% Senior Notes Due 2023 [Domain] [Domain]
Condensed Financial Statements, Captions [Line Items]
Interest Rate	4.50%
Recourse Debt Total	$ 500	500
Parent Company | Recourse Debt | 4.875% Senior Notes Due 2023 [Member] [Member]
Condensed Financial Statements, Captions [Line Items]
Interest Rate	4.875%
Recourse Debt Total	$ 613	713
Parent Company | Recourse Debt | Revolving Credit Facility [Member]
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	$ 180	0
Parent Company | Recourse Debt | 4.0% Senior Notes Due 2021 [Domain] [Domain]
Condensed Financial Statements, Captions [Line Items]
Interest Rate	4.00%
Recourse Debt Total	$ 500	500
Parent Company | Recourse Debt | 5.50% Senior Unsecured Note Due 2024
Condensed Financial Statements, Captions [Line Items]
Interest Rate	5.50%
Recourse Debt Total	$ 63	63
Parent Company | Recourse Debt | 5.50% Unsecured senior notes due 2025 [Domain]
Condensed Financial Statements, Captions [Line Items]
Interest Rate	5.50%
Recourse Debt Total	$ 544	544
Parent Company | Recourse Debt | 6.00% senior notes due 2026 [Domain]
Condensed Financial Statements, Captions [Line Items]
Interest Rate	6.00%
Recourse Debt Total	$ 500	500
Parent Company | Recourse Debt Excluding Junior Subordinated Debt
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	3,396	3,655
Recourse Debt Non Current	3,391	$ 3,650
Debt Maturity Year One [Member] | Parent Company
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	5
Debt Maturity Year Two [Member] | Parent Company
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	505
Debt Maturity Year Three [Member] | Parent Company
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	8
Debt Maturity Year Four [Member] | Parent Company
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	1,113
Debt Maturity Year Five [Member] | Parent Company
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	243
Debt Maturity Thereafter [Member] | Parent Company
Condensed Financial Statements, Captions [Line Items]
Recourse Debt Total	$ 1,544

Schedule I - Condensed Finan_10

Schedule I - Condensed Financial Information of Parent (Dividends from Subsidiaries and Affiliates) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Condensed Cash Flow Statements, Captions [Line Items]
Proceeds from Divestiture of Businesses and Interests in Affiliates	$ 178	$ 2,020	$ 108
SEC Schedule, 12-04, Cash Dividends Paid to Registrant, Consolidated Subsidiaries	1,000	1,900	$ 1,200
Parent Company [Member]
Condensed Cash Flow Statements, Captions [Line Items]
Proceeds from Divestiture of Businesses and Interests in Affiliates	$ 200	$ 1,200

Schedule I - Condensed Finan_11

Schedule I - Condensed Financial Information of Parent (Guarantees and Letters of Credit) (Details) $ in Millions	12 Months Ended
	Dec. 31, 2019USD ($)agreement	Sep. 30, 2019USD ($)
Condensed Financial Statements, Captions [Line Items]
Obligations number of agreements | agreement	77
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 1,226
Guarantees [Member] | Parent Company
Condensed Financial Statements, Captions [Line Items]
Obligations number of agreements	38
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 865
Standby Letters of Credit [Member] | Minimum
Condensed Financial Statements, Captions [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	1.00%
Standby Letters of Credit [Member] | Maximum
Condensed Financial Statements, Captions [Line Items]
Line of Credit Facility, Unused Capacity, Commitment Fee Percentage	3.00%
Guarantee Obligations [Member]
Condensed Financial Statements, Captions [Line Items]
Obligations number of agreements	37
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 853
Guarantee Obligations [Member] | Minimum
Condensed Financial Statements, Captions [Line Items]
Loss Contingency, Estimate of Possible Loss	0
Guarantee Obligations [Member] | Maximum
Condensed Financial Statements, Captions [Line Items]
Loss Contingency, Estimate of Possible Loss	$ 157
Unsecured Debt [Member] | Financial Standby Letter of Credit [Member]
Condensed Financial Statements, Captions [Line Items]
Obligations number of agreements	11
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 342
Unsecured Debt [Member] | Financial Standby Letter of Credit [Member] | Minimum
Condensed Financial Statements, Captions [Line Items]
Loss Contingency, Estimate of Possible Loss	1	$ 1
Unsecured Debt [Member] | Financial Standby Letter of Credit [Member] | Maximum
Condensed Financial Statements, Captions [Line Items]
Loss Contingency, Estimate of Possible Loss	$ 296	296
Secured Debt [Member] | Financial Standby Letter of Credit [Member]
Condensed Financial Statements, Captions [Line Items]
Obligations number of agreements	28
Guarantor Obligations, Maximum Exposure, Undiscounted	$ 19
Secured Debt [Member] | Financial Standby Letter of Credit [Member] | Minimum
Condensed Financial Statements, Captions [Line Items]
Loss Contingency, Estimate of Possible Loss	0
Secured Debt [Member] | Financial Standby Letter of Credit [Member] | Maximum
Condensed Financial Statements, Captions [Line Items]
Loss Contingency, Estimate of Possible Loss	$ 4	$ 4