Debt - Debt Balances and Activity (Details) - USD ($)	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Debt Balances and Activity [Roll Forward]
Long-term debt, beginning balance			$ 67,076,000,000
Note Redemptions	$ (264,000,000)		(264,000,000)
Repayments	(1,381,000,000)	$ (3,150,000,000)	(3,013,000,000)	$ (5,369,000,000)
Long-term debt, ending balance	66,552,000,000		66,552,000,000
Total Debt
Debt Balances and Activity [Roll Forward]
Total debt, beginning balance			74,193,000,000
Note Redemptions	(2,750,000,000)		(2,750,000,000)
Repayments			(264,000,000)
Reclassifications			0
Other			(190,000,000)
Total debt, ending balance	70,989,000,000		70,989,000,000
Third Party | Total Debt
Debt Balances and Activity [Roll Forward]
Total debt to third parties, beginning balance			70,454,000,000
Note Redemptions	(500,000,000)		(500,000,000)
Repayments			(264,000,000)
Reclassifications			0
Other			(196,000,000)
Total debt to third parties, ending balance	69,494,000,000		69,494,000,000
Short-term Debt | Affiliates
Debt Balances and Activity [Roll Forward]
Short-term debt to affiliates, beginning balance			2,245,000,000
Note Redemptions	(2,250,000,000)		(2,250,000,000)
Repayments			0
Reclassifications			0
Other			5,000,000
Short-term debt to affiliates, ending balance	0		0
Short-term Debt | Third Party
Debt Balances and Activity [Roll Forward]
Short-term debt, beginning balance			3,378,000,000
Note Redemptions	(500,000,000)		(500,000,000)
Repayments			(264,000,000)
Reclassifications			356,000,000
Other			(28,000,000)
Short-term debt, ending balance	2,942,000,000		2,942,000,000
Long-term debt | Affiliates
Debt Balances and Activity [Roll Forward]
Long-term debt to affiliates, beginning balance			1,494,000,000
Note Redemptions	0		0
Repayments			0
Reclassifications			0
Other			1,000,000
Long-term debt to affiliates, ending balance	1,495,000,000		1,495,000,000
Long-term debt | Third Party
Debt Balances and Activity [Roll Forward]
Long-term debt, beginning balance			67,076,000,000
Note Redemptions	0		0
Repayments			0
Reclassifications			(356,000,000)
Other			(168,000,000)
Long-term debt, ending balance	$ 66,552,000,000		$ 66,552,000,000