Changes in Accumulated Other Comprehensive (Loss) Income (Changes by Component) (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	$ 2,869
Other comprehensive (loss) income before reclassifications	0	$ 227	$ 4
Amounts reclassified from accumulated other comprehensive loss	(30)	(160)	25
Net current-period other comprehensive income	(30)	67	29
Balance	4,724	2,869
Changes related to cash flow derivative hedges
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	(639)	(647)	(651)
Other comprehensive (loss) income before reclassifications	3	171	(17)
Amounts reclassified from accumulated other comprehensive loss	(30)	(163)	21
Net current-period other comprehensive income	(27)	8	4
Balance	(666)	(639)	(647)
Changes in defined benefit plans
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	(8)	(57)	(66)
Other comprehensive (loss) income before reclassifications	6	46	5
Amounts reclassified from accumulated other comprehensive loss	0	3	4
Net current-period other comprehensive income	6	49	9
Balance	(2)	(8)	(57)
Foreign currency translation adjustments
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	3	(7)	(23)
Other comprehensive (loss) income before reclassifications	(9)	10	16
Amounts reclassified from accumulated other comprehensive loss	0	0	0
Net current-period other comprehensive income	(9)	10	16
Balance	(6)	3	(7)
Accumulated other comprehensive (loss) income
Accumulated Other Comprehensive Income (Loss) [Roll Forward]
Balance	(644)	(711)	(740)
Balance	$ (674)	$ (644)	$ (711)