Income Taxes (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023
Income taxes
Effective tax rate on income from continuing operations (as a percent)	18.80%	15.90%
Valuation allowance, deferred tax assets	$ 66		$ 65
Gross unrecognized tax benefits	156		150
Unrecognized tax benefits, net of federal tax benefits, that would affect the effective tax rate if recognized	126		120
Amount of decrease in unrecognized tax benefits reasonably possible within next 12 months	27
Increase (decrease) in interest and penalties	2	$ 1
Payable related to accrued interest and penalties	28		$ 26
State net operating losses
Income taxes
Valuation allowance, deferred tax assets	31
State deferred tax assets
Income taxes
Valuation allowance, deferred tax assets	2
Foreign net operating losses
Income taxes
Valuation allowance, deferred tax assets	33
State
Income taxes
Deferred tax assets, loss carryforwards	32
Foreign
Income taxes
Deferred tax assets, loss carryforwards	$ 42