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Fair Value Measurements Narrative (Details) - USD ($) $ in Millions	Sep. 30, 2021	Jun. 30, 2021
Liabilities:
Disposal Group, Including Discontinued Operation, Liabilities	$ 0	$ 96
Recurring
Assets:
Other investments	119	126
Liabilities:
Derivative Assets (Liabilities), at Fair Value, Net	47	42
Recurring | Level 1
Assets:
Other investments	119	126
Cash and Cash Equivalents, Fair Value Disclosure	812	1,883
Liabilities:
Derivative Assets (Liabilities), at Fair Value, Net	0	0
Recurring | Level 2
Assets:
Other investments	0	0
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Liabilities:
Derivative Assets (Liabilities), at Fair Value, Net	47	42
Recurring | Level 3
Assets:
Other investments	0	0
Cash and Cash Equivalents, Fair Value Disclosure	0	0
Liabilities:
Derivative Assets (Liabilities), at Fair Value, Net	0	0
Recurring | Fair Value, Inputs, Level 1, 2 and 3
Assets:
Cash and Cash Equivalents, Fair Value Disclosure	$ 812	$ 1,883

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