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Long-term Debt and Finance Leases - Interest Expense in Connection with Convertible Senior Notes, due 2048 (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Debt Instrument [Line Items]
Amortization of financing costs and debt discounts			$ 11	$ 20
Convertible Senior Notes Due 2048 | Recourse Debt
Debt Instrument [Line Items]
Contractual interest expense	$ 4	$ 4	8	8
Amortization of financing costs and debt discounts	1	4	1	8
Total	$ 5	$ 8	$ 9	$ 16
Effective Interest Rate	0.76%	1.32%	1.52%	2.65%

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Amount of amortization expense attributable to debt discount (premium) and debt issuance costs.

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