Accounting Policies and Supplemental Disclosures - Unearned Revenue (Details) - USD ($) $ in Billions	6 Months Ended
	Jun. 30, 2023	Dec. 31, 2022
Accounting Policies [Abstract]
Unearned revenue		$ 16.1
Unearned revenue, revenue recognized	$ 8.6
Unearned revenue, long-term	2.7	$ 2.9
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2023-07-01
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, contracts exceeding one year	$ 132.1
Remaining performance obligation, weighted average remaining life	3 years 7 months 6 days