Subsequent Events Subsequent Events (Details) - Subsequent Event [Member] - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2019	Jun. 30, 2019
Subsequent Event [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost (Credit), Gain (Loss) Due to Settlement	$ 50
Minimum [Member]
Subsequent Event [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost, Remeasurement Charge		$ 55
Maximum [Member]
Subsequent Event [Line Items]
Defined Benefit Plan, Net Periodic Benefit Cost, Remeasurement Charge		$ 75