CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Net income (loss)	$ 740	$ 756	$ (1,480)
Amounts arising during the period - gains (losses), net of tax (expense) benefit:
Foreign currency translation adjustments, net of tax	0	0	372
Qualifying derivatives, net of tax	0	0	(39)
Equity investee's other comprehensive income after tax	1	2	0
Defined benefit plans:
Prior service costs, net of tax	0	(1)	0
Net actuarial gain (loss), net of tax	(41)	11	(1)
Reclassifications from AOCI - (gains) losses, net of tax expense (benefit):
Qualifying derivatives, net of tax	3	2	25
Defined benefit plans:
Prior service costs, net of tax	1	2	2
Net actuarial (gain) loss, net of tax	(3)	17	126
Foreign currency translation adjustments, net of tax (UK Sale Reclassification)	0	0	786
Qualifying derivatives, net of tax (UK Sale Reclassification)	0	0	15
Total other comprehensive income (loss)	(39)	33	4,063
Comprehensive income	701	789	2,583
Net actuarial (gain) loss, net of tax (UK Sale Reclassification)	0	0	2,769
Prior service costs, net of tax (UK Sale Reclassification)	$ 0	$ 0	$ 8