Goodwill and Other Intangible Assets (Goodwill Roll Forward) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Goodwill [Roll Forward]
Goodwill	$ 3,788	$ 3,672
Accumulated impairment losses	(2,611)	(2,611)
Net balance	1,177	1,061
Goodwill, Acquired During Period	340
Goodwill, Written off Related to Sale of Business Unit	(224)
Operating Segments [Member] | MCAC [Member]
Goodwill [Roll Forward]
Goodwill	16	16
Accumulated impairment losses	0	0
Net balance	16	16
Goodwill, Acquired During Period	0
Goodwill, Written off Related to Sale of Business Unit	0
Operating Segments [Member] | EURASIA [Member]
Goodwill [Roll Forward]
Goodwill	0	0
Accumulated impairment losses	0	0
Net balance	0	0
Goodwill, Acquired During Period	0
Goodwill, Written off Related to Sale of Business Unit	0
Operating Segments [Member] | US and Utilities SBU
Goodwill [Roll Forward]
Goodwill	3,127	2,788
Accumulated impairment losses	(2,611)	(2,611)
Net balance	516	177
Goodwill, Acquired During Period	339
Goodwill, Written off Related to Sale of Business Unit	0
Operating Segments [Member] | South America
Goodwill [Roll Forward]
Goodwill	644	868
Accumulated impairment losses	0	0
Net balance	644	868
Goodwill, Acquired During Period	0
Goodwill, Written off Related to Sale of Business Unit	(224)
Operating Segments [Member] | Corporate and Other
Goodwill [Roll Forward]
Goodwill	1	0
Accumulated impairment losses	0	0
Net balance	1	$ 0
Goodwill, Acquired During Period	1
Goodwill, Written off Related to Sale of Business Unit	$ 0