New Accounting Standards New Accounting Standards - Effect of change related to ASU 2016-02 (Details) - Accounting Standards Update 2016-02 [Member] $ in Billions	Sep. 30, 2018 USD ($)
New Accounting Pronouncements or Change in Accounting Principle [Line Items]
Right-of-use assets	$ 1
Lease obligations	$ 1

Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

No definition available.

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Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration