Significant Accounting Policies [Line Items]

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- Definition

Present value of lessee's discounted obligation for lease payments from operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977

+ Details

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- Definition

Amount of lessee's right to use underlying asset under operating lease.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 842
-SubTopic 20
-Section 45
-Paragraph 1
-Subparagraph (a)
-URI http://asc.fasb.org/extlink&oid=77888419&loc=SL77918627-209977

+ Details

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- Definition

Amount of each individual error being corrected in the correcting adjustment.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 250
-SubTopic 10
-Section S99
-Paragraph 2
-Subparagraph (SAB Topic 1.N)
-URI http://asc.fasb.org/extlink&oid=112272810&loc=d3e30840-122693

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Significant Accounting Policies - Additional information (Detail) - USD ($) $ in Millions	3 Months Ended
	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019
Significant Accounting Policies [Line Items]
Operating lease right-of-use assets				$ 468
Operating lease liability				510
Accounting Standards Update 2016-02 [Member]
Significant Accounting Policies [Line Items]
Operating lease right-of-use assets				553
Operating lease liability				$ 561
Cost of Sales [Member] \| Error Of Principle [Member]
Significant Accounting Policies [Line Items]
Quantifying Misstatement in Current Year Financial Statements, Amount			$ 33
Selling and Marketing Expenses [Member] \| Error Of Principle [Member]
Significant Accounting Policies [Line Items]
Quantifying Misstatement in Current Year Financial Statements, Amount	$ 44	$ 28