Segments and Geographic Information Segment and Geographic Information (Assets, Depreciation and Amortization and Capital Expenditures ) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Segment Reporting Information [Line Items]
Total Assets	$ 32,963	$ 34,603	$ 33,648
Depreciation and Amortization	1,056	1,068	1,045
Capital Expenditures	2,140	1,960	2,551
Interest Income	298	268	318
Interest Expense	911	1,038	1,050
Investments in and Advances to Affiliates	1,080	835	966
Net Equity in Earnings (Losses) of Affiliates	(24)	(123)	(172)
Operating Segments [Member] | US and Utilities SBU
Segment Reporting Information [Line Items]
Total Assets	16,512	14,464	13,334
Depreciation and Amortization	549	534	465
Capital Expenditures	1,115	1,099	1,484
Interest Income	28	17	18
Interest Expense	362	371	301
Investments in and Advances to Affiliates	510	568	465
Net Equity in Earnings (Losses) of Affiliates	83	(8)	11
Operating Segments [Member] | South America
Segment Reporting Information [Line Items]
Total Assets	7,728	11,329	11,314
Depreciation and Amortization	273	294	315
Capital Expenditures	833	650	692
Interest Income	100	64	95
Interest Expense	239	237	285
Investments in and Advances to Affiliates	19	13	77
Net Equity in Earnings (Losses) of Affiliates	0	(80)	(129)
Operating Segments [Member] | MCAC SBU
Segment Reporting Information [Line Items]
Total Assets	4,545	4,847	4,770
Depreciation and Amortization	155	164	183
Capital Expenditures	143	183	344
Interest Income	7	14	22
Interest Expense	139	157	142
Investments in and Advances to Affiliates	144	168	107
Net Equity in Earnings (Losses) of Affiliates	(23)	(11)	(13)
Operating Segments [Member] | EURASIA [Member]
Segment Reporting Information [Line Items]
Total Assets	3,466	3,621	3,990
Depreciation and Amortization	66	63	67
Capital Expenditures	20	9	30
Interest Income	161	171	180
Interest Expense	98	113	127
Investments in and Advances to Affiliates	0	1	215
Net Equity in Earnings (Losses) of Affiliates	2	4	(9)
Corporate, Non-Segment [Member] | Corporate and Other
Segment Reporting Information [Line Items]
Total Assets	712	342	240
Depreciation and Amortization	13	13	15
Capital Expenditures	29	19	1
Interest Income	2	2	3
Interest Expense	73	160	195
Investments in and Advances to Affiliates	407	85	102
Net Equity in Earnings (Losses) of Affiliates	$ (86)	$ (28)	$ (32)