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Goodwill and Other Intangibles - Components of Intangible Assets Subject to Amortization (Details) - USD ($) $ in Millions | 12 Months Ended
--- | ---
Dec. 31, 2022 | Dec. 31, 2021
Finite-lived Intangible Assets [Roll Forward] |  |
Balance at beginning of period | $ 4,147 | $ 2,025
Purchases | 430 | 348
Acquisition of businesses | 55 | 2,352
Usage/Sales/Retirements | (374) | (365)
Write-off of fully amortized balances | (14) | (216)
Other | 0 | 3
Balance at end of period | 4,244 | 4,147
Less accumulated amortization | (2,112) | (1,636)
Net carrying amount | 2,132 | 2,511
Renewables Energy Certificates |  |
Finite-lived Intangible Assets [Roll Forward] |  |
Carrying value | 186 | 123
Emission Allowances |  |
Finite-lived Intangible Assets [Roll Forward] |  |
Balance at beginning of period | 634 | 672
Purchases | 26 | 10
Acquisition of businesses | 0 | 0
Usage/Sales/Retirements | (33) | (1)
Write-off of fully amortized balances | (14) | (51)
Other | 11 | 4
Balance at end of period | 624 | 634
Less accumulated amortization | (528) | (536)
Net carrying amount | 96 | 98
Customer and Supply Contracts |  |
Finite-lived Intangible Assets [Roll Forward] |  |
Balance at beginning of period | 638 | 28
Purchases | 0 | 0
Acquisition of businesses | 0 | 610
Usage/Sales/Retirements | 0 | 0
Write-off of fully amortized balances | 0 | 0
Other | (3) | 0
Balance at end of period | 635 | 638
Less accumulated amortization | (235) | (94)
Net carrying amount | 400 | 544
Customer Relationships |  |
Finite-lived Intangible Assets [Roll Forward] |  |
Balance at beginning of period | 1,679 | 527
Purchases | 0 | 0
Acquisition of businesses | 55 | 1,308
Usage/Sales/Retirements | 0 | 0
Write-off of fully amortized balances | 0 | (158)
Other | (4) | 2
Balance at end of period | 1,730 | 1,679
Less accumulated amortization | (787) | (518)
Net carrying amount | $ 943 | $ 1,161
Weighted average useful life, years | 6 years | 12 years
Marketing Partnerships |  |
Finite-lived Intangible Assets [Roll Forward] |  |
Balance at beginning of period | $ 284 | $ 285
Purchases | 0 | 0
Acquisition of businesses | 0 | 0
Usage/Sales/Retirements | 0 | 0
Write-off of fully amortized balances | 0 | 0
Other | 0 | (1)
Balance at end of period | 284 | 284
Less accumulated amortization | (146) | (123)
Net carrying amount | 138 | 161
Trade Names |  |
Finite-lived Intangible Assets [Roll Forward] |  |
Balance at beginning of period | 683 | 373
Purchases | 0 | 0
Acquisition of businesses | 0 | 310
Usage/Sales/Retirements | 0 | 0
Write-off of fully amortized balances | 0 | 0
Other | (4) | 0
Balance at end of period | 679 | 683
Less accumulated amortization | (341) | (294)
Net carrying amount | 338 | 389
Other |  |
Finite-lived Intangible Assets [Roll Forward] |  |
Balance at beginning of period | 229 | 140
Purchases | 404 | 338
Acquisition of businesses | 0 | 124
Usage/Sales/Retirements | (341) | (364)
Write-off of fully amortized balances | 0 | (7)
Other | 0 | (2)
Balance at end of period | 292 | 229
Less accumulated amortization | (75) | (71)
Net carrying amount | $ 217 | $ 158

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI https://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + Details
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