Commitments and Contingencies - Schedule of Changes in Contract Obligations (Details) $ in Millions	9 Months Ended
Sep. 30, 2021 USD ($)
Loss Contingency Accrual [Roll Forward]
Beginning contract obligations	$ 360
Liabilities settled	(159)
Accretion of discount	6
Changes in estimate	(2)
Ending contract obligations	$ 205

Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments.

No definition available.

Name:	us-gaap_ContractualObligation
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant