Debt - Commercial Paper Program (Details) - Commercial Paper Program - USD ($)	3 Months Ended	12 Months Ended
	Mar. 31, 2024	Dec. 31, 2023
Debt Instrument
Maximum outstanding amount capacity	$ 2,000,000,000	$ 2,000,000,000
Borrowings	$ 183,000,000	$ 720,000,000
Debt instrument, term (in months)	15 days	37 days
Weighted-average interest rate (as a percent)	5.58%	5.70%