Financing Activities - Schedule of Debt Extinguishment (Details) - USD ($) $ in Millions	3 Months Ended		6 Months Ended
	Jun. 30, 2023	Jun. 30, 2022	Jun. 30, 2023	Jun. 30, 2022	May 01, 2020
Debt Instrument [Line Items]
Loss on extinguishment of debt	$ 0	$ 43	$ 0	$ 116
Convertible Debt And Unsecured Debt
Debt Instrument [Line Items]
Cash paid for debt and interest		209		474
Principal repayment		168		362
Loss on extinguishment of debt		43		116
Non-cash amortization of debt discount and (issuance) costs		(2)		(4)
Convertible Debt
Debt Instrument [Line Items]
Stated interest rate					1.25%
1.25% Convertible Notes due 2025 | Convertible Debt
Debt Instrument [Line Items]
Stated interest rate	1.25%		1.25%
Cash paid for debt and interest		178		409
Principal repayment		138		302
Loss on extinguishment of debt		42		112
Non-cash amortization of debt discount and (issuance) costs		(2)		(5)
5.125% Notes due 2027 | Unsecured Debt
Debt Instrument [Line Items]
Stated interest rate	5.125%		5.125%
Cash paid for debt and interest		27		61
Principal repayment		26		56
Loss on extinguishment of debt		1		4
Non-cash amortization of debt discount and (issuance) costs		0		1
4.75% Notes due 2023 | Unsecured Debt
Debt Instrument [Line Items]
Stated interest rate	4.75%		4.75%
Cash paid for debt and interest		3		3
Principal repayment		3		3
Loss on extinguishment of debt		0		0
Non-cash amortization of debt discount and (issuance) costs		0		0
5.25% Notes due 2025 | Unsecured Debt
Debt Instrument [Line Items]
Stated interest rate	5.25%		5.25%
Cash paid for debt and interest		1		1
Principal repayment		1		1
Loss on extinguishment of debt		0		0
Non-cash amortization of debt discount and (issuance) costs		$ 0		$ 0