Schedule I-Parent Company Only Financial Statements - Balance Sheets (Details) - USD ($) $ in Millions	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Current Assets:
Cash	$ 555	$ 232
Total Current Assets	1,250	866
TOTAL ASSETS	5,025	4,671
Current Liabilities:
Accounts payable	210	195
Total Current Liabilities	501	480
Capital stock	1,233	874	$ 634	$ 756
Paid in capital	1,891	1,848
Accumulated deficit	(628)	(953)
Accumulated other comprehensive loss, net of tax	(31)	(22)
TOTAL LIABILITIES & STOCKHOLDERS’ EQUITY	5,025	4,671
Parent Company
Current Assets:
Cash	0	0
Total Current Assets	0	0
Investments in and advances to subsidiaries	1,233	874
TOTAL ASSETS	1,233	874
Current Liabilities:
Accounts payable	0	0
Total Current Liabilities	0	0
Capital stock	1	1
Paid in capital	1,891	1,848
Accumulated deficit	(628)	(953)
Accumulated other comprehensive loss, net of tax	(31)	(22)
TOTAL LIABILITIES & STOCKHOLDERS’ EQUITY	$ 1,233	$ 874