Borrowings and Other Debt Obligations - Narrative (Details) $ in Millions	3 Months Ended
	Mar. 31, 2024 USD ($)	Dec. 31, 2023 USD ($)	Oct. 24, 2023 USD ($)	Mar. 24, 2023 USD ($)	Oct. 27, 2021 USD ($)	Sep. 30, 2021 USD ($)	Dec. 12, 2019 USD ($)
Short-term Debt [Line Items]
Debt Instrument, Covenant, Maximum Net Leverage Ratio			2.00
Minimum liquidity amount			$ 400
Letters of credit outstanding, amount	$ 374	$ 376
Performance Letters of Credit
Short-term Debt [Line Items]
Letters of credit outstanding, amount	223	218
Performance Letters of Credit Or Other Borrowings
Short-term Debt [Line Items]
Letters of credit outstanding, amount	50	52
LC Credit Agreement Letters of Credit
Short-term Debt [Line Items]
Letters of credit outstanding, amount	273	270
Uncommitted Letters of Credit
Short-term Debt [Line Items]
Letters of credit outstanding, amount	101	106
Letters of credit outstanding, cash collateral	100	101
Amended LC Credit Agreement
Short-term Debt [Line Items]
Credit agreement, maximum capacity			550				$ 400
Amended LC Credit Agreement | Performance Letters of Credit
Short-term Debt [Line Items]
Credit agreement, maximum capacity			250
Amended LC Credit Agreement | Performance Letters of Credit Or Other Borrowings
Short-term Debt [Line Items]
Credit agreement, maximum capacity			300
Senior Notes | Senior Notes 6.5 Percent Due 2028
Short-term Debt [Line Items]
Stated interest rate on debt						6.50%
Face amount of debt						$ 500
Repayments of Senior Debt	167
Long-Term Debt, Gross	82	248
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net	2	5
Senior Notes | Senior Notes 8.625 Percent Due 2030
Short-term Debt [Line Items]
Stated interest rate on debt					8.625%
Face amount of debt					$ 1,600
Long-Term Debt, Gross	1,600	1,600
Debt Instrument, Unamortized Discount (Premium) and Debt Issuance Costs, Net	12	13
Line of Credit | Amended LC Credit Agreement
Short-term Debt [Line Items]
Credit agreement, maximum capacity	550	550	$ 200	$ 400
Credit Agreement Minimum Liquidity Requirement	250
Credit Agreement Minimum Liquidity Requirement, Increase Limit	$ 400
Debt instrument, covenant, minimum interest coverage ratio	2.50			2.50
Debt Instrument, Covenant, Maximum Net Leverage Ratio	3.50
Debt Instrument, Covenant, Maximum Secured Net Leverage Ratio	1.50
Minimum liquidity amount				$ 300
LC Credit Agreement Letters of Credit
Short-term Debt [Line Items]
Face amount of debt	$ 0	$ 0