Accounting Policies and Supplemental Disclosures - Unearned Revenue (Details) - USD ($) $ in Billions	6 Months Ended
	Jun. 30, 2022	Dec. 31, 2021
Accounting Policies [Abstract]
Unearned revenue		$ 14.0
Unearned revenue, revenue recognized	$ 8.1
Unearned revenue, long-term	2.6	$ 2.2
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction, Start Date [Axis]: 2022-07-01
Accounting Policies [Abstract]
Remaining performance obligation, contracts exceeding one year	$ 100.1
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction [Line Items]
Remaining performance obligation, weighted average remaining life	3 years 10 months 24 days