Goodwill and Intangible Assets, Net (Changes in Carrying Values of Intangible Assets and Related Accumulated Amortization) (Parenthetical) (Details) - USD ($) $ in Millions	6 Months Ended
	Dec. 31, 2019	Jun. 30, 2019
Intangible Assets [Line Items]
Accumulated amortization of amortizable intangible assets	$ 142	$ 129
Minimum
Intangible Assets [Line Items]
Useful life of amortizable intangible assets	5 years
Maximum
Intangible Assets [Line Items]
Useful life of amortizable intangible assets	20 years