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Long-term Debt and Finance Leases - Senior Notes (Details) - USD ($) $ / shares in Units, $ in Millions	9 Months Ended
	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Jan. 01, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2021	Mar. 31, 2021	Dec. 31, 2020
Debt Instrument [Line Items]
Discount amortization period	7 years
Adjustment for adoption of new accounting guidance	$ 5,130	$ 5,300	$ 5,030		$ 3,600	$ 4,078	$ 2,544	$ 1,517	$ 1,680
Additional Paid-In Capital
Debt Instrument [Line Items]
Adjustment for adoption of new accounting guidance	8,450	8,442	8,433		8,531	8,525	8,519	8,513	8,517
Retained Earnings
Debt Instrument [Line Items]
Adjustment for adoption of new accounting guidance	$ 2,584	$ 2,600	$ 2,171		464	$ 971	$ (567)	$ (1,565)	$ (1,403)
Cumulative Effect, Period of Adoption, Adjustment
Debt Instrument [Line Items]
Adjustment for adoption of new accounting guidance					(43)
Debt discount				$ 57
Deferred tax liabilities				14
Cumulative Effect, Period of Adoption, Adjustment | Additional Paid-In Capital
Debt Instrument [Line Items]
Adjustment for adoption of new accounting guidance				(100)	(100)
Cumulative Effect, Period of Adoption, Adjustment | Retained Earnings
Debt Instrument [Line Items]
Adjustment for adoption of new accounting guidance				$ 57	$ 57
Recourse Debt | Convertible Senior Notes due 2048
Debt Instrument [Line Items]
Convertible notes, conversion price (in usd per share)	$ 43.77

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