Leases - Leases in Condensed Consolidated Balance Sheet (Details) $ in Millions	Jun. 30, 2020 USD ($)
Finance Lease Assets And Liabilities Lessee
Finance lease right-of-use assets, Net Property	$ 6
Finance lease right-of-use assets, Balance Sheet [Extensible List]	us-gaap:PropertyPlantAndEquipmentAndFinanceLeaseRightOfUseAssetAfterAccumulatedDepreciationAndAmortization
Finance lease liabilities, Short-term debt	$ 3
Finance lease liabilities, current, Balance Sheet [Extensible List]	us-gaap:DebtCurrent
Finance lease liabilities, Long-term debt	$ 3
Finance lease liabilities, noncurrent, Balance Sheet [Extensible List]	us-gaap:LongTermDebtAndCapitalLeaseObligations
Operating Lease Assets And Liabilities Lessee
Operating lease right-of-use assets, Other assets	$ 75
Operating lease right-of-use assets, Balance Sheet [Extensible List]	us-gaap:OtherAssetsNoncurrent
Operating lease liabilities, Other current liabilities	$ 14
Operating lease liabilities, current, Balance Sheet [Extensible List]	us-gaap:OtherLiabilitiesCurrent
Operating lease liabilities, Other liabilities	$ 61
Operating lease liabilities, noncurrent, Balance Sheet [Extensible List]	us-gaap:OtherLiabilitiesNoncurrent