Goodwill and Other Intangibles - Schedule of Amortization and Retirement of Intangible Assets (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Total amortization	$ 495	$ 168	$ 134
Depreciation and amortization	785	435	373
Emission Allowances
Finite-Lived Intangible Assets [Line Items]
Total amortization	24	28	32
Customer and Supply Contracts
Finite-Lived Intangible Assets [Line Items]
Total amortization	66	12	14
Customer Relationships
Finite-Lived Intangible Assets [Line Items]
Total amortization	327	74	44
Marketing Partnerships
Finite-Lived Intangible Assets [Line Items]
Total amortization	24	24	15
Trade Names
Finite-Lived Intangible Assets [Line Items]
Total amortization	47	27	25
Other
Finite-Lived Intangible Assets [Line Items]
Total amortization	7	3	4
Depreciation and amortization	$ 3	$ 3	$ 4