Fair Value of Financial Instruments - Assets and Liabilities Measured and Recorded at Fair Value (Details) - USD ($) $ in Millions	Dec. 31, 2021	Dec. 31, 2020
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in securities (classified within other current and non-current assets)	$ 32	$ 25
Other trust fund investments (classified within other non-current assets):
Other trust fund investments	1	1
Measured using net asset value practical expedient:
Total assets	8,188	1,745
Derivative liabilities:
Total liabilities	4,799	884
Foreign exchange contract
Derivative assets:
Derivative Assets	1
Derivative liabilities:
Commodity contracts	1
Commodity contracts
Derivative assets:
Derivative Assets	7,139	821
Derivative liabilities:
Commodity contracts	4,798	884
Cash and cash equivalents
Nuclear trust fund investments:
Nuclear trust fund investments	33	23
U.S. government and federal agency obligations
Nuclear trust fund investments:
Nuclear trust fund investments	112	70
Federal agency mortgage-backed securities
Nuclear trust fund investments:
Nuclear trust fund investments	100	89
Commercial mortgage-backed securities
Nuclear trust fund investments:
Nuclear trust fund investments	44	36
Corporate debt securities
Nuclear trust fund investments:
Nuclear trust fund investments	122	144
Equity securities
Nuclear trust fund investments:
Nuclear trust fund investments	494	434
Measured using net asset value practical expedient:
Equity contracts	7	8
Foreign government fixed income securities
Nuclear trust fund investments:
Nuclear trust fund investments	4	7
Equity securities-nuclear trust fund investments
Measured using net asset value practical expedient:
Equity contracts	99	87
Level 1
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in securities (classified within other current and non-current assets)	15	10
Other trust fund investments (classified within other non-current assets):
Other trust fund investments	1	1
Measured using net asset value practical expedient:
Total assets	1,635	597
Derivative liabilities:
Total liabilities	626	86
Level 1 | Foreign exchange contract
Derivative assets:
Derivative Assets	0
Derivative liabilities:
Commodity contracts	0
Level 1 | Commodity contracts
Derivative assets:
Derivative Assets	981	59
Derivative liabilities:
Commodity contracts	626	86
Level 1 | Cash and cash equivalents
Nuclear trust fund investments:
Nuclear trust fund investments	33	23
Level 1 | U.S. government and federal agency obligations
Nuclear trust fund investments:
Nuclear trust fund investments	111	69
Level 1 | Federal agency mortgage-backed securities
Nuclear trust fund investments:
Nuclear trust fund investments	0	0
Level 1 | Commercial mortgage-backed securities
Nuclear trust fund investments:
Nuclear trust fund investments	0	0
Level 1 | Corporate debt securities
Nuclear trust fund investments:
Nuclear trust fund investments	0	0
Level 1 | Equity securities
Nuclear trust fund investments:
Nuclear trust fund investments	494	434
Measured using net asset value practical expedient:
Equity contracts
Level 1 | Foreign government fixed income securities
Nuclear trust fund investments:
Nuclear trust fund investments	0	1
Level 1 | Equity securities-nuclear trust fund investments
Measured using net asset value practical expedient:
Equity contracts
Level 2
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in securities (classified within other current and non-current assets)	17	15
Other trust fund investments (classified within other non-current assets):
Other trust fund investments	0	0
Measured using net asset value practical expedient:
Total assets	5,990	914
Derivative liabilities:
Total liabilities	4,009	643
Level 2 | Foreign exchange contract
Derivative assets:
Derivative Assets	1
Derivative liabilities:
Commodity contracts	1
Level 2 | Commodity contracts
Derivative assets:
Derivative Assets	5,701	623
Derivative liabilities:
Commodity contracts	4,008	643
Level 2 | Cash and cash equivalents
Nuclear trust fund investments:
Nuclear trust fund investments	0	0
Level 2 | U.S. government and federal agency obligations
Nuclear trust fund investments:
Nuclear trust fund investments	1	1
Level 2 | Federal agency mortgage-backed securities
Nuclear trust fund investments:
Nuclear trust fund investments	100	89
Level 2 | Commercial mortgage-backed securities
Nuclear trust fund investments:
Nuclear trust fund investments	44	36
Level 2 | Corporate debt securities
Nuclear trust fund investments:
Nuclear trust fund investments	122	144
Level 2 | Equity securities
Nuclear trust fund investments:
Nuclear trust fund investments	0	0
Measured using net asset value practical expedient:
Equity contracts
Level 2 | Foreign government fixed income securities
Nuclear trust fund investments:
Nuclear trust fund investments	4	6
Level 2 | Equity securities-nuclear trust fund investments
Measured using net asset value practical expedient:
Equity contracts
Level 3
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]
Investments in securities (classified within other current and non-current assets)	0	0
Other trust fund investments (classified within other non-current assets):
Other trust fund investments	0	0
Measured using net asset value practical expedient:
Total assets	457	139
Derivative liabilities:
Total liabilities	164	155
Level 3 | Foreign exchange contract
Derivative assets:
Derivative Assets	0
Derivative liabilities:
Commodity contracts	0
Level 3 | Commodity contracts
Derivative assets:
Derivative Assets	457	139
Derivative liabilities:
Commodity contracts	164	155
Level 3 | Cash and cash equivalents
Nuclear trust fund investments:
Nuclear trust fund investments	0	0
Level 3 | U.S. government and federal agency obligations
Nuclear trust fund investments:
Nuclear trust fund investments	0	0
Level 3 | Federal agency mortgage-backed securities
Nuclear trust fund investments:
Nuclear trust fund investments	0	0
Level 3 | Commercial mortgage-backed securities
Nuclear trust fund investments:
Nuclear trust fund investments	0	0
Level 3 | Corporate debt securities
Nuclear trust fund investments:
Nuclear trust fund investments	0	0
Level 3 | Equity securities
Nuclear trust fund investments:
Nuclear trust fund investments	0	0
Measured using net asset value practical expedient:
Equity contracts
Level 3 | Foreign government fixed income securities
Nuclear trust fund investments:
Nuclear trust fund investments	0	0
Level 3 | Equity securities-nuclear trust fund investments
Measured using net asset value practical expedient:
Equity contracts