Leases Maturity of Lease Liabilities (Details) $ in Millions	Jun. 30, 2019 USD ($)
Schedule of Lease Assets and Liabilities [Line Items]
Operating Lease, Remainder of Fiscal Year	$ 95
Finance Lease, Remainder of Fiscal Year	9
Operating Lease, Year Two	136
Finance Lease, Year Two	10
Operating Lease, Year Three	107
Finance Lease, Year Three	2
Operating Lease, Year Four	80
Finance Lease, Year Four	1
Operating Lease, Year Five	60
Finance Lease, Year Five	1
Operating Lease, Year Six and Thereafter	177
Finance Lease, Year Six and Thereafter	2
Operating Lease, Total Lease Payments	655
Finance Lease, Total Lease Payments	25
Operating Lease, Interest	75
Finance Lease, Interest	1
Operating Lease, Liability	580
Finance Lease, Liability	$ 24